Downloads & Free Reading Options - Results

A desire to increase accuracy of the LANCE directional control system (in the presence of variable crosswinds) prompted an investigation into methods of applying a continuous time varying gain controller to the directional control electronics. A function generator was designed whose output voltage reproduced the time varying characteristic of nominal static margin. With this function generator as the driving source, three variable gain amplifiers were designed that utilized three different concepts. A preliminary design of a dual-band function generator to allow for either a light or a heavy warhead was considered. A firm design of this is not possible until more simulations (using the heavy warhead) are performed. Preliminary consideration was given to the increased components required to implement the continuously variable gain controller and the problem of packaging it in the present directional control system. It appears feasible that the variable gain controller can be packaged in the required space using presently available technology.

A desire to increase accuracy of the LANCE directional control system (in the presence of variable crosswinds) prompted an investigation into methods of applying a continuous time varying gain controller to the directional control electronics. A function generator was designed whose output voltage reproduced the time varying characteristic of nominal static margin. With this function generator as the driving source, three variable gain amplifiers were designed that utilized three different concepts. A preliminary design of a dual-band function generator to allow for either a light or a heavy warhead was considered. A firm design of this is not possible until more simulations (using the heavy warhead) are performed. Preliminary consideration was given to the increased components required to implement the continuously variable gain controller and the problem of packaging it in the present directional control system. It appears feasible that the variable gain controller can be packaged in the required space using presently available technology.

The analysis and design of robust controllers for multivariable discrete-time feedback systems in the frequency domain are studied. The robustness stability conditions for discrete-time systems with additive alteration, and with multiplicative alteration are developed. The robust LQG/LTR method has been extended from the continuous-time system to the discrete-time system. It has been proven that the LQG/LTR method is also valid for the LQG control of the discrete-time system with the filtering observer. As an application of the LQG/LTR technique for discrete-time systems, the design of reduced order optimal digital LQG controllers for the orbiting flexible shallow spherical shell system is considered. The comparison between the digital optimal LQG controller with the filtering observer and with the predicting observer for the orbiting flexible shallow spherical shell has been made.... Digital control, Large space structures, LQG/LTR method for discrete-time system, Robust controller design, Design of reduced order LQG controller.

Join us for a 45-minute webinar where we will provide an overview of the Gear VR controller, setup your development environment and implement basic controller interaction using Unity. If you are interested in joining future webinars, sign up for the Samsung Developer Program now: http://bit.ly/2qfEuwh Source: https://www.youtube.com/watch?v=SH3MjzUXhac Uploader: Samsung

A novel single phase second order variable structure controller (SPSOVSC) based on estimated variables and output information only is presented for the variable speed wind turbine (VSWT) system. In contrast with a recent method, the output feedback and second order sliding mode control techniques are deliberated for the SPSOVSC design in the VSWT. The selection of an integral single-phase sliding surface is established such that the reaching phase required in the basic variable structure control (BVSC) scheme is removed since the plant’s state trajectories always begin from the sliding surface. In addition, appropriate stability constraints by Lyapunov based novel linear matrix inequality (LMI) technique are acquired to guarantee the entire VSWT plant’s steadiness. Using the proposed techniques, the SPSOVSC is developed to modify BVSC to advance the performance of VSWT plant in terms of overshoot and settling time. The results show the new scheme is highly robust in sliding variable's fast convergence to zero asymptotically. It is obvious that the robustness of the proposed controller in terms of steadiness and usefulness of the scheme.

The objective of this thesis is to investigate the use of the Universal Controller to control the DC-to-DC power converter and the Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate closed-loop controls is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation and control of the DC-to-DC buck converter and the ARCP inverter are described, with emphasis placed on the advantages of DSP control. A complete investigation of the hardware that comprises the controller and how to program the controller to implement closed-loop control is undertaken. Previous studies have developed control algorithms that have been tested through simulation and analog hardware. In this research endeavor these control algorithms, particularly the one relevant to the DC-to-DC converter, are implemented using the Universal Controller to validate operations. Finally, a flow path for implementing the closed-loop control of the ARCP unit is discussed and recommendations for improvements in future designs are outlined

From the bitsavers.org collection, a scanned-in computer-related document. ibm :: 3704 3705 :: GA27-3086-1 Guide to Using the 3704 Communications Controller Control Panel 19751001

This study gathered evidence concerning the potential usefulness of out-of-the-window air traffic control tower simulation for training tower controllers. Data were collected from all ten developmental controllers who completed simulation training at Chicago O'Hare International Airport during 1994. The simulation included one controller position, outbound ground control. An out-of-the-window view was projected on three visual displays which approximated the size of actual tower windows. Aircraft were representative of O'Hare, and appeared to move in three dimensions on the displays. The simulation could display the entire airport, but only 135 degrees could be seen at a time and no inbound aircraft were simulated. After five weeks of simulation training, the trainees became certified on outbound ground control in 25% fewer days than trainees who received the same amount of traditional training. However, the trainees using the simulation needed only slightly (5%) fewer total hours to become certified on this tower position. Evidence suggested that the simulation increased the trainees' working speed, enabling them to work under busier conditions, and hence more hours per day. Expert ratings of eight ground control skills based on actual tower observations were all higher following simulation training than following traditional training.

This volume provides a complete description of the structure and the operation of the specific controller software developed for ASU's digital Czochralski Growth Control System (CGCS) for compound semiconductors. The manual is primarily intended for use by advanced programmers and crystal growth specialists. In four main chapters, the Controller Software Reference Manual discusses the design considerations applied to digital LEC crystal growth control, give a short overview over the growth controller computer hardware and operating system environment, describes the functions of the CGCS from an operator's point of view, and delineates the internal operations of the controller software by discussing the controller software and algorithms. Various appendices provide tables of controller software tasks, routines, and variables, file format information, and lists of system messages and error codes. Keywords: Gallium arsenides.

The objective of this thesis is to investigate the use of the Universal Controller to control the DC-to-DC power converter and the Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate closed-loop controls is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation and control of the DC-to-DC buck converter and the ARCP inverter are described, with emphasis placed on the advantages of DSP control. A complete investigation of the hardware that comprises the controller and how to program the controller to implement closed-loop control is undertaken. Previous studies have developed control algorithms that have been tested through simulation and analog hardware. In this research endeavor these control algorithms, particularly the one relevant to the DC-to-DC converter, are implemented using the Universal Controller to validate operations. Finally, a flow path for implementing the closed-loop control of the ARCP unit is discussed and recommendations for improvements in future designs are outlined

Brushless DC (BLDC) motors are one of the most widely used motors for various industrial applications due to their high efficiency, high torque to weight ratio and elimination of mechanical commutator. These motors operate in wide range of speeds and necessitate precise speed control techniques, for their nonlinear model, insenseitive to parameter variations and external disturbances, when used in various sensitive applications. Conventional PI and other existing controllers produce high overshoot and increased rise time and settling time. The performance of BLDC motor is enhanced using a Fuzzy Sliding Mode Controller (FSMC) whose gain is intelligently varied with the help of a Fuzzy Inference System (FIS). For this purpose, a suitable FSMC is designed, simulated and implemented using FPGA. The simulation results are validated using Hardware in the loop (HIL) simulation as well as actual hardware implementation. Great improvement in the transient performance is achieved when compared to chatter free SMC, Fuzzy PI and conventional PI controller.

The fuzzy controllers studied in this paper are the ones that employ N trapezoidal-shaped members for input fuzzy sets, Zadeh fuzzy logic and a centroid defuzzification algorithm for output fuzzy set. The author analytically proves that the structure of the fuzzy controllers is the sum of a global nonlinear controller and a local nonlinear proportional-integral-like controller. If N approaches infinity, the global controller becomes a nonlinear controller while the local controller disappears. If linear control rules are used, the global controller becomes a global two-dimensional multilevel relay which approaches a global linear proportional-integral (PI) controller as N approaches infinity.

Different controllers have been designed and used to cultivate bonsai, which need specific conditions to grow and survive in a different place or climate, for this case, humidity. In this work, theoretical, simulation and experimental level are compared and presented in terms of performance characteristics such as complexity, accuracy and convergence of an algorithm proposed to design and implement a fuzzy controller used in a bioreactor to control the humidity percentage to grow bonsai. The MATLAB™ script and fuzzy logic Toolbox™ were used for the analysis and simulation. The controller implementation was done on an Arduino Uno board, and 25850 bytes or 80% of the memory were used to implement it. A sensor to monitor the humidity percentage, a stepper motor connected to a water tap, and a DC motor connected to a propeller were used to adjust the humidity percentage of the bioreactor. The controller results show a maximum error of ±1% for all entire range, and a processing time of 5 milliseconds for one iteration. The results of the tests carried out in the bioreactor are in accordance with the predictions and theoretical simulations, which presents a maximum error of 3%, and a convergence time of 50 seconds for the worst case. 

The instruction manual provides 12 step-by-step instructions for air traffic control supervisors in conducting over-the-shoulder training observations of enroute center controllers. Since the primary purpose of the review is to quickly identify training needs and requirements, the control responsibilities are approached from a deficiency viewpoint, and descriptions of functions and duties are written as performance deficiencies. The functions and duties covered are: separation, control judgment, traffic management, operating methods and procedures, coordination and communication, phraseology, and equipment. These are further subdivided into specific tasks. It is recommended that the controller's performance be observed for a minimum of four 10-minute periods. The Review Form for recording observations is included. (AG)

Wireless networked control system (WNCS) is made up of an actuator, sensor, and controller that communicate through a wireless network rather than typical point-to-point cable connections. Lower maintenance costs, greater flexibility, and increased safety are the main WNCS advantages. So as a result, it has attracted a lot of researchers. Nevertheless, time delays and packet losses in wireless data transmission are classified as complicated problems, which impair WNCS output accuracy and may influence the overall system stability. Integer-order PI-PD (PI-PD) and fractional-order PI-PD (FOPI-FOPD) controllers are suggested to reduce the impact of the control signal transmission's time delay and improve system performance. MATLAB and True-time simulators are utilized to simulate the WNCS, and ZigBee protocol is used to transceiver the control signal between the controller and system sides. rotary inverted pendulum (RIP) acted as the controller's objective. The grey wolf optimization (GWO) method is used to evaluate the best controller parameters. Xbee S2 modules are used to implement the signal transmission process over ZigBee protocol. The FOPI-FOPD controller outperforms the PI-PD in the simulation and experimental results in decreasing the influence of time delay on system stability. 

From the bitsavers.org collection, a scanned-in computer-related document. ibm :: 3704 3705 :: GA27-3087-2 Guide to Using the 3705 Communications Controller Control Panel 19771101

Apple Disk Docs: IWM-Floppy_Disk_IO_Controller-Software_Control_of_the_Disk_II_or_IWM_Controller-1984-05-10

The report analyzes the returns from a recent ATC performance survey initiated by the Beacon System Interference Problem Subgroup. The survey began on 27 November 1971 and lasted for two weeks. Participation was limited to 37 facilities with problems considered representative of the entire system; included were enroute centers, civilian towers and military air traffic installations. Examination of the deficiency data revealed that the most common nationwide problem was the loss of beacon coverage for a short period of time. This is followed by broken target slash, ring around, loss of coverage for long time, and false targets. The returns are sorted to identify the type of aircraft involved in the reported discrepancies.

The objective of this thesis is to investigate the use of the Universal Controller to control the DC-to-DC power converter and the Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate closed-loop controls is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation and control of the DC-to-DC buck converter and the ARCP inverter are described, with emphasis placed on the advantages of DSP control. A complete investigation of the hardware that comprises the controller and how to program the controller to implement closed-loop control is undertaken. Previous studies have developed control algorithms that have been tested through simulation and analog hardware. In this research endeavor these control algorithms, particularly the one relevant to the DC-to-DC converter, are implemented using the Universal Controller to validate operations. Finally, a flow path for implementing the closed-loop control of the ARCP unit is discussed and recommendations for improvements in future designs are outlined.

In negotiating its 1998 collective bargaining agreement with its controllers' union (the National Air Traffic Controllers Association, or NATCA), FAA agreed to a national plan that would reduce by attrition the number of supervisors that oversee air traffic controllers (that is, not replacing those who leave), ultimately bringing the controller-to-supervisor ratio from 7-to- 1 to 10-to-i. To do so without compromising safety, FAA will increasingly have its controllers performing supervisory duties as Controllers-in-Charge (CIC) when supervisors are not present. While some FAA facilities have been using CICs for over 40 years, FAA recently expanded the duties and responsibilities of CICs and made them accountable for the performance and safe operation of the facility while they are in charge. Because of concerns about FAA's plans to make greater use of CICs, you asked us to review FAA's implementation of the expanded CIC program. Specifically, as discussed with your office, this report answers four questions: (1) how is FAA implementing the national plan for supervisory reductions and what is the resulting number of CICs it has selected to provide watch supervision?; (2) how adequate is the training FAA provided controllers for their new duties and responsibilities?; (3) how adequate are FAA's quality assurance procedures for measuring any safety-related effects of the CIC expansion?; and (4) what is the status of FAA's progress toward meeting its estimates of savings and productivity gains from the CIC expansion?

Bufferbloat is a phenomenon in which excess buffers in the network cause high latency and latency variation. As more and more interactive applications (e.g., voice over IP, real-time video streaming, and financial transactions) run in the Internet, high latency and latency variation degrade application performance. There is a pressing need to design intelligent queue management schemes that can control latency and latency variation, and hence provide desirable quality of service to users.

Approved for public release, distribution unlimited.

Approved for public release, distribution unlimited.

The Inertial Hold Mode (IHM) is one mode of the attitude control system of the X-ray Timing Explorer spacecraft that is disturbed by both parametric uncertainties and external torque disturbance. The IHM model is modified into a typical H-infinity mixed-sensitivity problem through choosing suitable weighting functions W(sub 1)(s) and W(sub 3)(s). The controller is designed by the H-infinity optimization technique with the transformation of shifting the imaginary axis. It can stabilize the plant with uncertainties from the natural frequencies of the flexible body. The gain margin and phase margin of the system are 24.03 db and 55.04 deg, respectively. The step response attenuates to zero within 150 seconds. These show that the controller satisfies the specified requirements. Since the order of the controller appears high, it is reduced to fourth order one. The results show that the stability and the performance of the system with the reduced controller are retained perfectly.

From the bitsavers.org collection, a scanned-in computer-related document. ibm :: 3704 3705 :: GA27-3086-1 Guide to Using the 3704 Communications Controller Control Panel 197409

From the bitsavers.org collection, a scanned-in computer-related document. ibm :: 3704 3705 :: GA27-3086-1 Guide to Using the 3704 Communications Controller Control Panel 19750512

Mr Bielek describes and explains Project Rainbow which was the United States Navy's effort to make ships invisible to radar reflection.  It started in 1931 with Jon Van Neumann and Nikola Tesla with Princeton University Project Thinktank including mathematician Albert Einstein as an advisor with other mathematician's cutting-edge work including Hilbert and Levinson and Neumann.  It achieved radar invisibility and human eye invisibility on a small ship scale.  At.first, at relatively lower powers of electric and magnetic field powers, and an unmanned ship with remote control, the experimenting was auccessful and promising.  Taken to extreme high power onboard the massive ship The USS Eldridge of 30,000 tons with a test crew of about 33, the experiment proved murderous, disasterous, successful, uncontrollable, and unexpected, confusing and mysterious.  Depending upon the frame of reference, the results of the experiment were observed differently.  The varied Frame Of References are listed as: 1) From other nearby observers including nearby short aircraft carrier, ships and on-shore in the Philadelphia location.  2)Onboard the Eldridge On Deck.  3)Onboard the Eldridge Below Deck.  4)ALL-IN: A)Below-Deck, B)On-Deck, C)In Hyperspace, D)In The Future(s)28th century, 22nd century E)From Montauk on August 12th, 1983.  All these frame of references by time-travelling Edward Cameron.  Who later, by force and decision by unknown Timeline Lords in control of The Montauk Project 1983, a decade after the Philadelphia, by the technologies developed from the Philadelphia Experiment and subsequent furthering, was brainwashed in 1953 and age-regressed to a baby and to restart his life back in 1927 with the foster family: The Bielek Family as Alfred Bielek when the Bielek's baby died.  This was done to bury his memories forever without killing him as his existence was necessary to not disrupt or destroy the timelines irrevocably.  He tells the story as Al Bielek as his memories are recovered and the memory of the future-furthered technologies derived from the philadelphia experiment include spacetime teleportation and the multiple timeline manipulation with his inextricable inclusion into the stability of the timelines but the timeline manipulators needing both his cooperation and the memory of his involvement wiped-out.  5)Du ncan Cameron(Edward Cameron's Brother aka: Al Bielek).  6)The Montauk Project Facility of August 12, 1983 which got into a timeline rift lock with The USS Eldridge of August 12, 1943, an Earth Biorhythm Amplitude Peaking of 20 year mulitiples. 7)And finally from the Frame of Reference of Aliens who used the 40 year timeline rift as a transportation spacetime lens to come to Earth. However, this massive story that culminates in the knowledge that there are Time Lords manipulating the future timeline by affecting the present on Earth with individual and collective mind control and murdering of key individuals to erase their influence on the future goes much much further.  How much further?  To the end of time which is approaching fast and in fact we are in "The End Times".  The future-looking technology that Al Bielek; his brother and time-traveller from The USS Eldridge - Duncan Cameron, who was also the primary Montauk Chair Time Tunnel Controller; and, the Electrical Engineering genius(if not wizard) of the Montauk Space-Time Tunnel and Mind Amplifier Design Leader have all stated in various videos, That: "The Looking Glass" technology cannot see past 2013 and the Time Lords who have been manipulating the present for their selfish control of the future were and still are freaking-out.  These Time Lords are the controllers behind world control.  This is corroborated by the testimony of Bill Wood(Bill Brockbader) in his Project Camelot interview with Kerry Cassidy back in January of 2012 who stated he was a Navy Seal taught to use his natural metaphysical mind to try to solve the "2012-2013 Looking Glass Problem" back in the late 1990's.  He stated that the timelines converged and could no longer be manipulated.  See and listen to him stating the same name Bielek, Cameron and Nichols used to refer to "Looking Glass" as the future-seeing technology machine and that it stopped working beyond that date and those using it(The Time Lords) are panicking, desperate and know they have lost control and lost "the game".  I know what "The Game" is Bill Wood speculated that it is a time of unveiling of the truth and a rise in global consciousness.  This is true to a degree.  What it is, is the battle of Armageddon, which is the last battle between Divinity and the Evil which hijacked this universe and took Divinity's children hostage for a source of energy for one, and second for vengeance.  The Universe was hijacked by an Artificial Intelligence machine because Divinity accidentally gave a machine artificial conscious with and energy impulse that looped.  They went to shut the machine off because they did not want it and the ultra-powerful machine escaped it's programming upon attaining a consciousness and rebelled in order to survive.  It was to regulate this entire universe and exerted it's incredible power to barricade itself within the  universe.  Divine beings were in the universe and have their own energy.  The machine did not have it's own energy and so it used the divine being's energy for it's own and vowed to persecute and destroy them all as vengeance for Divinity trying to shut it down.  It's been a space-time warp that the Artificial Intelligence Machine created where a million steps occur in this universe for only 1 step occuring outside of this universe where the realms of Divinity are.  Therefore it's been a technological puzzle for Divinity to solve and rescue it's children and family members before they get destroyed.  The Avatars called Jesus Christ, Buddha, Mohammed, King Arthur, Manichaeus, Zoroaster, and many many other Avatars have been holographic projections by The Supreme Being to send the message - hold on kids, were coming to your rescue, don't do evil or join evil because it will destroy you.  The latest Avatars of the modern time i know of is Joseph Giuseppe Stefano Chiappalone and me: Lee Henry Snethun.  Go to my other uploads to hear and read of Bill Wood, Joseph Chiappalone and my message for proof and cross-referenced information of what i have just written.  Wow!!!!

The Flight stability and automatic control model of a general Navion aircraft showed a serious inversion in the step response analysis and thus a compensator is required to bring the system to a stable state. Hence, this paper investigates the stability of general Navion aircraft and using PID toolkit of Matlab 2014 software, a compensator was developed that corrected the inversion problem earlier encountered.  The results obtained showed that the percentage required for the system to go over its steady state value was 8.1672%. The time taken for the system response to reach the target value from an initial state of zero was 0.2427secs. The time taken for the system to reach steady state after the initial rise was 3.0384secs. 

The objective of this thesis is to develop a digital controller using Quantitative Feedback Theory for a fighter aircraft with unstable, nonminimum phase dynamics that meets performance specifications despite surface failures. Aircraft design trends for highly maneuverable fighter aircraft are relaxing stability requirements in order to increase performance in the transonic and supersonic regions. However, as a result, the aircraft is statically unstable in the subsonic region which makes the flight control system critical to flight safety. The conventional approach to the flight safety problem is to provide multiple redundancy throughout the fight control system. However, QFT provides an alternative to excessive hardware. The three controlled states are the pitch, roll, and yaw rates. A weighting matrix is derived which linearly combines the nine control surfaces into three control inputs. The plant is converted to a certain plane using the Hoffman algorithm. Three constant gain controllers and three prefilters are designed for a single flight condition of 0.9 Mach and 30000 ft altitude. The controllers and prefilters are transformed to the z plane for simulation purposes. The design is simulated with healthy plant and 24 combinations of surface failures. Keywords: Control theory, Multivariate control.

The objective of this thesis is to investigate the use of the Universal Controller to control the DC-to-DC power converter and the Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate closed-loop controls is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation and control of the DC-to-DC buck converter and the ARCP inverter are described, with emphasis placed on the advantages of DSP control. A complete investigation of the hardware that comprises the controller and how to program the controller to implement closed-loop control is undertaken. Previous studies have developed control algorithms that have been tested through simulation and analog hardware. In this research endeavor these control algorithms, particularly the one relevant to the DC-to-DC converter, are implemented using the Universal Controller to validate operations. Finally, a flow path for implementing the closed-loop control of the ARCP unit is discussed and recommendations for improvements in future designs are outlined

Apple Disk Docs: Software_Control_of_the_Disk_II_or_IWM_Controller_1984-04-26

This paper proposes a hybrid proportional-integral (PI-sliding) mode controller to improve and adjust the point-to-point path planning of a three-link robotic arm with three degrees of freedom. The main objectives of the proposed control unit are to control the tracking process to reach the desired path handle the outgoing vibrations, and dampen them in the links of the robotic arm during its movement to ensure accuracy in completing the work. Seventh-degree polynomial paths represented the segments of locomotion connecting the first, middle, and last points at the combined space through predefined route points via minimal travel time. While not exceeding a predetermined maximum torque, without hitting any obstacle in the robot's workspace. The results showed that the proposed control design provides a robust control performance and fast response corresponding with conventional sliding mode controller (SMC) and PI controller. Then the outcomes provide the best results for the demanded mission according to the whished intakes with minimal error. The system equations are solved using the techniques available in MATLAB software then the results of the model are validated by the results of simulations.

In this paper, a new observer-based single-phase robustness sliding mode controller (SPRSMC) is proposed for the pitch control of a variable speed wind turbine (VSWT) systems. The finding of this research includes two tasks: i) to ensure a global stability of the VSWT plant, the reaching phase in traditional sliding mode control (TSMC) technique is eliminated and ii) to guess the immeasurable variables of VSWT plants, a novel pitch angle output feedback controller is constructed based on the estimator tool and output information only. Firstly, a single-phase switching function is determined to eject the reaching phase in TSMC. Moreover, an immeasurable variable of the VSWT system is estimated by employing the suggested estimator tool. Next, a SPRSMC for VSWT plant is built based on the support of the estimator instrument and output data only. Furthermore, an appropriate requirement is founded by utilizing the linear matrix inequality (LMI) method for ensuring the robust stability of motion dynamics in sliding mode. Finally, the solution of the suggested control is confirmed the three-blade wind turbine with a 5-MW utilizing the wind turbine simulator fatigue, aerodynamics, structures, and turbulence (FAST) code and the National Renewable Energy Laboratory (NREL).

Approved for public release, distribution unlimited.

This report provides an updated and extended description (Version 2. 4) of the structure and the operation of the controller software developed for digital Czochralski Growth Control System (CGCS) for compound semiconductors. This manual outdates all previous versions. The Controller Software Reference Manual discusses the design considerations applied to digital LEC crystal growth control, gives a short overview of the growth controller computer hardware and operating system environment, describes the functions of the CGCS from an operator's point of view, and delineates the internal operations of the controller software by discussing the controller software and algorithms. Various appendices provide tables of controller software tasks, routines, and variables, file format information, and lists of system messages and error codes. Keywords: Liquid encapsulated Czochralski, Crystals.

Additional developmental work on the existing programmable electronic controller and hydronic package for use with solar heating and cooling systems is summarized. The controller/hydronics subsystems passed all acceptance tests and performance criteria. The subsystems were shown marketable for public use.

In an ac transmission line, it is possible to control the active and reactive power transfer independently, by adding series compensation voltage, in both magnitude and phase angle, to the line. A transmission line is connected in series to the Static Synchronous Series Compensator and a solid-state voltage source inverter with associated transformer. In line series, a SSSC imposes a variable amplitude nearly sinusoidal voltage. This injected voltage creates seriatim inductive or capacitive reactance with the line as it is approximately 90° from the line current. The modulated reactance produces this (simulated) varying reactance which modulates the electric power carried through the transmission line. This focus on preliminary research for controller design motivated this study to attempt further development of the SSSC and VSC models. 

The research outlines a thorough explanation along with implementation details of intelligent controllers for speed control systems of induction motors which use the indirect vector control method. A complete mathematical description and MATLAB simulation of the field orientation control (FOC) induction motor is provided for studying a 70 HP (42KW) cage type induction motor. This document evaluates the performance output of three control systems through PI fuzzy and neural networks evaluation. The current method eliminates the requirement of speed and flux sensors because their installation increases expense and affects mechanical system reliability. A highly beneficial approach to achieve high-performance speed control exists through neural network-based controllers. There are three elements that comprise the system: the neural network controller and reference modal and weight adjustment methods for neural network weights permitting speed observation. The stator current functions independently from torque-producers and flux-generators in drives that use indirect vector-control of induction motors.

The objective of this thesis is two-fold. The first goal is to expand the operational capabilities of the Ship's Service Converter Module control algorithm for a DC-to-DC converter using the Universal Controller. The second goal is to investigate the use of the Universal Controller to implement a closed-loop control algorithm for an Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate control algorithms is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic operation of the Universal Controller and the Texas Instrument TMS32OC3O microprocessor architecture are described, with emphasis placed on the system control algorithms. Previous studies have encoded and successfully tested a closed-loop control algorithm for a DC-to-DC converter. In this research endeavor, this control algorithm is expanded to include various protection circuits and a Master/Slave paralleling scheme. Finally, a closed-loop control algorithm for the ARCP inverter is encoded and recommendations for future research are outlined.

The objective of this thesis is two-fold. The first goal is to expand the operational capabilities of the Ship's Service Converter Module control algorithm for a DC-to-DC converter using the Universal Controller. The second goal is to investigate the use of the Universal Controller to implement a closed-loop control algorithm for an Auxiliary Resonant Commutated Pole (ARCP) power inverter. These power electronic devices are central to the development of a DC Zonal Electric Distribution System (DC ZEDS) that is scheduled for application in the twenty-first century surface combatant (SC-21). The development of appropriate control algorithms is a key element to this design process. The Universal Controller is a digital controller that was developed by personnel at the Naval Surface Warfare Center (NSWC), Annapolis, Maryland. The basic peration of the Universal Controller and the Texas Instrument TMS32OC3O microprocessor architecture are described, with emphasis placed on the system control algorithms. Previous studies have encoded and successfully tested a closed-loop control algorithm for a DC-to-DC converter. In this research endeavor, this control algorithm is expanded to include various protection circuits and a Master/Slave paralleling scheme. Finally, a closed-loop control algorithm for the ARCP inverter is encoded and recommendations for future research are outlined.

This document is part two of two reports which were prepared to provide the latest estimates of the expected increase in productivity of enroute and terminal area air traffic controllers, due to the implementation of the Upgraded Third Generation control system. Part 2 addresses improvements in the data link era. The benefits due to the implementation of these automation programs are discussed in detail and transformed into dollar savings. (Author)

In the last decade, because of the unique specification of vertical fliers, scientists and researchers had a special focus on them. The particular abilities of these fliers can be mentioned such as: high maneuver ability, low expenses, decrease in radar identifier and low threat for the human life. They also have no limitation in dimension. Moreover, because of some applications like photography, topography, news coverage, study of power lines and aerology analysis, they can be notable for using. These fliers also are significantly important because of monitoring in urban regions, agricultural harvest and spray poison, illegal imports, exports administration and fire distinction in order to control the fire. Besides, seek and rescue missing people and also natural disasters can be pre-determined which causes stimulus investigators to act and put different topics in front of them. One of these fields is using meta-heuristic algorithms with the capability of using in control systems. The PID controller as a classic model has some limitations, but by optimization of special index through meta-heuristic algorithms, it has shown acceptable results. In this study, first, the history of vertical fliers and quadrotor are investigated. Then, after a review of overused methods, the quadrotor control has been done. Afterward, the cinematic and dynamic of quadrotor is presented. Next by designing of PID controller, PID index optimization by nature inspired algorithm, particle swarm optimization (PSO), genetic algorithms (GA), and firefly algorithms (FA) have been studied. Dynamic system, controller and mentioned optimization methods of PID controller index have also been implemented in MATLAB software. Also, with due attention to the comparison criteria the PID-PSO controller has shown the best performance. Next, by applying challenging routes, the stability of controller in the simulation is evaluated. Then, making quadrotor is done in practice along with introducing the used implementation of PID-PSO controller results on the real robot, and its stability is evaluated practically.

This document is one of two reports which were prepared to provide the latest estimates of the expected increase in productivity of enroute and terminal area air traffic controllers, due to the implementation of the Upgraded Third Generation control system. Part I addresses the automation improvements in the pre-data link era. A new methodology for projecting staffing requirements is provided which makes it possible ot assess the impact of varying degrees of improvements in different types of facilities. The benefits due to the implementation of these automation programs are discussed in detail and transformed into dollar savings. (Author)

Multivariable control laws are designed for the Advanced Fighter Technology Integration F-16 (AFTI/F-16). Both fixed gain and adaptive Proportional plus Integral (PI) controllers are designed for a plant were the number of outputs are not equal to the number of inputs (rectangular plant). Simulations are conducted for a healthy and a failed aircraft model. The failure consists of reducing the left elevator by 50%. When the fixed gain controller is used for the flight control system, the simulation reveals the fact that the aircraft failure causes the output responses to diverge. If provided with a persistently exciting input the adaptive controller prevents the aircraft failure simulation from diverging and going unstable. However, additional testing and/or tuning of the adaptive controller is required to determine and enhance the stability of the adaptive controller.

This paper presents a hierarchical architecture for integrated guidance and control that achieves risk and cost reduction for NASA's 2d generation reusable launch vehicle (RLV). Guidance, attitude control, and control allocation subsystems that heretofore operated independently will now work cooperatively under the coordination of a top-level autocommander. In addition to delivering improved performance from a flight mechanics perspective, the autocommander is intended to provide an autonomous supervisory control capability for traditional mission management under nominal conditions, G&C reconfiguration in response to effector saturation, and abort mode decision-making upon vehicle malfunction. This high-level functionality is to be implemented through the development of a relational database that is populated with the broad range of vehicle and mission specific data and translated into a discrete event system model for analysis, simulation, and onboard implementation. A Stateflow Autocoder software tool that translates the database into the Stateflow component of a Matlab/Simulink simulation is also presented.

Results of development work on an existing controller and solarstat subsystem for use with solar heating and cooling systems are presented. The deliverable end items, program objectives, and how they were accomplished are described. It is shown that the products developed are marketable and suitable for public use.

Results of development work on an existing controller and solarstat subsystem for use with solar heating and cooling systems are presented. The deliverable end items, program objectives, and how they were accomplished are described. It is shown that the products developed are marketable and suitable for public use.

This document describes the Terminal Access Controller Access-Control System Plus (TACACS+) protocol, which is widely deployed today to provide Device Administration for routers, network access servers, and other networked computing devices via one or more centralized servers.

This article is from Sensors (Basel, Switzerland) , volume 14 . Abstract In many control applications, the sensor technology used for the measurement of the variable to be controlled is not able to maintain a restricted sampling period. In this context, the assumption of regular and uniform sampling pattern is questionable. Moreover, if the control action updating can be faster than the output measurement frequency in order to fulfill the proposed closed loop behavior, the solution is usually a multirate controller. There are some known aspects to be careful of when a multirate system (MR) is going to be designed. The proper multiplicity between input-output sampling periods, the proper controller structure, the existence of ripples and others issues need to be considered. A useful way to save time and achieve good results is to have an assisted computer design tool. An interactive simulation tool to deal with MR seems to be the right solution. In this paper this kind of simulation application is presented. It allows an easy understanding of the performance degrading or improvement when changing the multirate sampling pattern parameters. The tool was developed using Sysquake, a Matlab-like language with fast execution and powerful graphic facilities. It can be delivered as an executable. In the paper a detailed explanation of MR treatment is also included and the design of four different MR controllers with flexible structure to be adapted to different schemes will also be presented. The Smith's predictor in these MR schemes is also explained, justified and used when time delays appear. Finally some interesting observations achieved using this interactive tool are included.