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A model reference adaptive controller for a Wind Energy Conversion System Based on a Permanent Magnet Synchronous Generator Fed by a Matrix Converter

A Model Reference Adaptive Controller for a Wind Energy Conv...

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35th Annual Conference of the IEEE-Industrial-Electronics-Society

作者： Pahlevaninezhad, Majid Eren, Suzan Bakhshai, Alireza Jain, Praveen Queens Univ Kingston ON Canada

ISBN: (纸本)9781424446483

This paper presents a model reference adaptive Control (MRAC) approach for a Wind Energy Conversion System (WECS) to track the maximum power point. This WECS includes a permanent magnet synchronous generator (PMSG) fed by a matrix converter. Since the mechanical power generated by the wind turbine is a function of its shaft speed at a given wind velocity, the proposed controller provides the desired voltage at the output of the matrix converter so as to control the generator speed. This controller is based on the model reference adaptive control approach to track the optimum speed. In addition, the controller is robust against system uncertainties and high frequency disturbances. Theoretical analysis verifies the global stability and performance of the proposed approach. Simulation results are included which show that the proposed approach has a superior performance compared to the conventional PI controller.

关键词： Wind Energy PMSG Matrix Converter Maximum Power Point Tracking model reference adaptive controller

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adaptive Nonlinear Hierarchical Control of a Quad Tilt-Wing UAV

Adaptive Nonlinear Hierarchical Control of a Quad Tilt-Wing ...

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European Control Conference (ECC)

作者： Yildiz, Yildiray Unel, Mustafa Demirel, Ahmet Eren Bilkent Univ Dept Mech Engn TR-06800 Ankara Turkey Sabanci Univ Fac Engn & Nat Sci TR-34956 Istanbul Turkey

ISBN: (纸本)9783952426937

Position control of a quad tilt-wing UAV via a nonlinear hierarchical adaptive control approach is presented. The hierarchy consists of two levels. In the upper level, a model reference adaptive controller creates virtual control commands so as to make the UAV follow a given desired trajectory. The virtual control inputs are then converted to desired attitude angle references which are fed to the lower level attitude controller. Lower level controller is a nonlinear adaptive controller. The overall controller is developed for the full nonlinear dynamics of the tilt-wing UAV and thus no linearization is required. In addition, since the approach is adaptive, uncertainties in the UAV dynamics can be handled. Performance of the controller is presented via simulation results.

关键词： aerospace components attitude control autonomous aerial vehicles hierarchical systems linearisation techniques model reference adaptive control systems nonlinear control systems nonlinear dynamical systems position control trajectory control UAV dynamics lower level attitude controller model reference adaptive controller nonlinear dynamics nonlinear hierarchical adaptive control approach quad tilt-wing UAV virtual control commands virtual control inputs Adaptation models adaptive control Attitude control Nonlinear dynamical systems System dynamics Uncertainty Vehicles

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Modified model reference adaptive controllers for improved regulatory performance

Modified Model Reference Adaptive controllers for improved r...

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IEEE International Conference on Emerging Trends in Computing, Communication and Nanotechnology (ICECCN)

作者： Mohideen, K. Asan Mathi, K. Valar Kalasalingam Univ Dept Instrumentat & Control Engn Anandnagar 626126 Krishnankoil India

ISBN: (纸本)9781467350372;9781467350365;9781467350358

Level control is an important application in process industry. Traditionally PID controller has been used for this purpose. As level process is non-linear, whenever the process is operated outside a linearized region the PID controller parameters need to be tuned. In this case adaptive controllers are more suited. The objective of the paper is to apply a Modified model reference adaptive controller (MRAC) to control level in a hybrid tank system in regulatory mode and compare its disturbance rejection capability with that of a standard direct MRAC and a well-designed PID controller. In this paper, a direct MRAC, two types of modified MRACs and a PID controller are designed for a hybrid tank process and their performances are compared while operated in regulatory mode. The results show that the Modified MRACs give better disturbance rejection when compared with the MRAC and the PID controller. It is concluded that the Modified MRACs can be used to obtain very good regulatory performance during the control of nonlinear processes.

关键词： Disturbance rejection model reference adaptive controller Modified MRAC nonlinear process control Real-coded Genetic Algorithm

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Effect of parameter variations on the performance of direct current (DC) servomotor drives

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JOURNAL OF VIBRATION AND CONTROL 2013年第10期19卷 1575-1586页

作者： Shanmugasundram, Ramasami Zakaraiah, Karim Muhammed Yadaiah, Narri Sri Ramakrishna Engn Coll Dept Elect & Elect Engn Coimbatore Tamil Nadu India SNS Coll Engn & Technol Dept Elect & Elect Engn Coimbatore Tamil Nadu India JNTUH Coll Engn Dept Elect & Elect Engn Hyderabad Andhra Pradesh India

This paper describes the design and implementation of a proportional-integral-derivative (PID) controller and model reference adaptive controller (MRAC) for the brushless direct current (BLDC) servomotor drive system. The performance of the BLDC servomotor drive system is analyzed under different operating conditions such as change in inertia, resistance, load disturbance and change in reference speed. Simulation and experimental results are presented to prove that the parameter variations will considerably affect the performance of the PID controller based BLDC drive but not the MRAC based BLDC drive due to its inherent capability to adapt itself to the changing environment. Moreover, determining mechanical load parameters accurately for the small DC servomotor drives is a great challenge to the control system designers as they are very essential for the design of controllers. This paper also presents a simple and accurate method for determining the mechanical parameters of motor and load.

关键词： Brushless DC servomotor model reference adaptive controller parameter variation PID controller

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Real Time Control of Ball and Beam System with model reference adaptive Control Strategy using MIT Rule

Real Time Control of Ball and Beam System with Model Referen...

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IEEE International Conference on Computational Intelligence and Computing Research (ICCIC)

作者： Jain, Priyank Nigam, M. J. Indian Inst Technol Dept Elect & Commun Engn Roorkee Uttar Pradesh India

ISBN: (纸本)9781479915941;9781479915958

During real time control of a dynamic system, one needs to design control systems with advanced control strategies to handle inherent nonlinearities and disturbances. This paper deals with the designing of a model reference adaptive control system with the use of MIT rule for real time control of a ball and beam system. This paper uses the gradient theory to develop MIT rule in which one or more parameters of adaptive controller needs to be adjusted so that the plant could track the reference model. A linearized model of ball and beam system is used in this paper to design the controller on MATLAB and the designed controller is then applied for real time control of ball and beam system. Simulations carried on SIMULINK and MATLAB show good performance of the designed adaptive controller in real time.

关键词： adaptive controller ball and beam system gradient theory MIT rule model reference adaptive controller real time control

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Robust Fixed Point Transformations in the model reference adaptive Control of a Three DoF Aeroelastic Wing

Robust Fixed Point Transformations in the Model Reference Ad...

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2nd International Conference on Mechatronics and Applied Mechanics (ICMAM2012)2nd International Conference on Mechatronics and Applied Mechanics (ICMAM2012)

作者： Tar, Jozsef K. Rudas, Imre J. Bito, Janos F. Kosi, Krisztian Obuda Univ Antal Bejczy Ctr IRobot Becsi Ut 96-B H-1034 Budapest Hungary Obuda Univ Inst Appl Math H-1034 Budapest Hungary Obuda Univ Doctoral Sch Appl Informat H-1034 Budapest Hungary

ISBN: (纸本)9783037856512

The model reference adaptive controllers (MRAC) of dynamic systems have the purpose of simulating the dynamics of a reference system for an external control loop while guaranteeing precise tracking of a prescribed nominal trajectory. Such controllers traditionally are designed by the use of some Lyapunov function that can guarantee global and sometimes asymptotic stability but pays only little attention to the primary design intent, has a great number of arbitrary control parameters, and also is a complicated technique. The Robust Fixed Point Transformations (RFPT) were recently introduced as substitutes of Lyapunov's technique in the design of adaptive controllers including MRACs, too. Though this technique guarantees only stability (neither global nor asymptotic), it works with a very limited number of control parameters, directly concentrates on the details of tracking error relaxation, and it is very easily can be designed. In the present paper this novel technique is applied for the MRAC control of a 3 Degrees-of-Freedom (DoF) aeroelastic wing model that is an underactuated system the model-based control of which attracted much attention in the past decades. To exemplify the efficiency of the method via simulations it is applied for PI and PID-type prescribed error relaxation for a reference model the parameters of which considerably differ from that of the actual system.

关键词： model reference adaptive controller adaptive Control Robust Fixed Point Transformations Aeroelastic Wing model Underactuated Systems

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Energy Factor modelling and model reference adaptive Control of Chaos in Boost Converter

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INTERNATIONAL JOURNAL OF ONLINE ENGINEERING 2012年第2期8卷 39-44页

作者： Manikumar, R. Kayalvizhi, R. Annamalai Univ Dept Instrumentat Engn Annamalai Tamil Nadu India

Chaos is an apparently disordered deterministic behavior, which is universally occurring in many systems in all areas of science. In this paper, chaos in boost converter has been analyzed by taking the load and supply voltage as a bifurcation parameter under open loop condition. The mathematical model of the boost converter is obtained using Energy Factor modeling approach. A Lyapunov's stability based model reference adaptive controller (MRAC) is designed for the boost converter and is implemented to control chaos by keeping the system stable from chaotic stage. The proposed adaptive controller, in the on line mode has the ability to track a specific high-frequency reference voltage and also to adapt for the variations in the load and high-frequency pulsed supply voltage. The simulation results show that the proposed method updates the adjustable parameter values to guarantee stable operation from chaotic stage and also to provide good dynamical responses than the conventional Proportional Integral Derivative (PID) controller.

关键词： model reference adaptive controller Pulse width modulator Direct current Proportional Integral Derivative Metal Oxide Semi conductor Field Effect Transistor Energy Factor

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SIMULATION STUDYING ON model reference adaptive CONTROL FOR HYDRAULIC SYSTEM

SIMULATION STUDYING ON MODEL REFERENCE ADAPTIVE CONTROL FOR ...

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第四届中国·宁波国际计算机科学与技术学术大会

作者： Huayan Yu~1 Lihua Ren~2 Yu Xu~1 1.Changzhou Institute of Mechatronic technology,Changzhou 213164,P.R.China 2.Ningbo Dahongying University,Ningbo 315175,P.R.China

Designing theory based on model reference adaptive control is widely used in the design of adaptive control *** main idea is to make the adaptive control error approximate zero as time goes *** the paper a model reference adaptive controller based on Diophantine equation is designed to regulate the asymmetric cylinder system controlled by symmetric valve,deduces adaptive control arithmetic that fits the system to make the output of system follow the output of model reference *** that the problems of asymmetry of dynamic characteristic、low accuracy、amplitude damping and delay phase of symmetric valve control asymmetric cylinder system are resolved.

关键词： model reference adaptive controller Asymmetric cylinder Symmetric valve

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A modified adaptive controller design for teleoperation systems

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ROBOTICS AND AUTONOMOUS SYSTEMS 2010年第5期58卷 676-683页

作者： Hosseini-Suny, K. Momeni, H. Janabi-Sharifi, F. Ryerson Univ Dept Mech & Ind Engn Robot Mechatron & Mfg Automat Lab RMAL Toronto ON M5B 2K3 Canada Dept Elect Engn Tehran Iran

In this paper, a new adaptive controller is proposed to ensure the stability and good performance of a teleoperation system while a wide range of time delays is considered. For this means, a feedforward compensator is designed to ensure system passivity and then a new model reference adaptive controller (MRAC) is developed to provide good performance. The developed system demonstrates good stability and force tracking capabilities. A command generator tracker (CGT) is designed for a sample teleoperation system and the results are compared with the proposed system. (C) 2009 Elsevier B.V. All rights reserved.

关键词： Time delay model reference adaptive controller Feedforward compensator Command generator tracker Passive system Teleoperation system

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An Observer Based on-line Rotor Speed Estimation Technique for a Vector Controlled Induction Machine

An Observer Based on-line Rotor Speed Estimation Technique f...

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IEEE International Symposium on Industrial Electronics

作者： Nag, Tridibesh Sen, Agniprotim Chatterjee, Debashis NSEC Kolkata India MSIT Kolkata India Jadavpur Univ Kolkata India

ISBN: (纸本)9781424416653

A novel rotor speed estimation method using model reference adaptive control (MRAC) is proposed to improve the performance of a sensor less vector controller. In MRAC methods, state variables, such as rotor flux and stator back EMF are estimated in a reference model and then compared with state variables estimated by using an adjustable model. The difference of these state variables is then used in an estimation of rotor speed. A new MRAC method is proposed in this paper that uses the stator current as the state variable for estimating the speed. In the proposed method, the stator current error is represented as a function of the first degree for the error value in the speed estimation. The proposed flux observer is designed without any integrator and is based on algebraic equations involving the measured and filtered signals. Thus, the proposed method offers a considerable improvement in the performance of a sensor less vector controller at a low speed. The superiority of the proposed method is verified by simulation and experiments.

关键词： Speed estimator current observer model reference adaptive controller

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