WSEAS Transactions on Systems and Control

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Print ISSN: 1991-8763
E-ISSN: 2224-2856

Volume 7, 2012

Issue 1, Volume 7, January 2012

Title of the Paper: Self-Organizing Control of Urban Traffic Signal Based on Multiway Intersection Offset-Setting Model

Authors: Wisnu Jatmiko, Adi Wibowo, Abdurrahman S. K., Herry, A. A. Krisnadhi, Ade Azurat, T. Fukuda, K. Sekiyama

Abstract: This paper proposes a model of distributed self-organizing tra c control with self-organizing map in real situation. This model can be used as a general setting for controlling almost any type of intersection. It uses nonlinear coupled oscillator with mul

Keywords: Urban Traffic Control, Distributed Self-organizing Control, Multiway Intersection

Title of the Paper: Optimization of an SVM QP Problem Using Mixed Variable Nonlinear Polynomial Kernel Map and Mixed Variable Unimodal Functions

Authors: Emre Tokgöz, Theodore B. Trafalis

Keywords: SVM, Inhomogeneous Polynomial Kernel Map, Unimodal Function, Mixed Convex Function, Minimization.

Title of the Paper: Induction Motor Controls and Implementation using dSPACE

Authors: A. Abbou, T. Nasser, H. Mahmoudi, M. Akherraz, A. Essadki

Abstract: This paper is devoted to the modeling and dSPACE implementation of three-phase squirrel-cage induction motor control using the constant Volts per Hertz principle and rotor flux oriented control (RFOC) strategy. A fuzzy PI controller is used in the speed c

Keywords: Induction Motor (IM), dSPACE, constant V/f principle, RFOC strategy , PI fuzzy

Issue 2, Volume 7, April 2012

Title of the Paper: A Comparative Study of Rotor Time Constant Online Identification of an Induction Motor Using High Gain Observer and Fuzzy Compensator

Authors: Abdelhadi Elbacha, Zakaria Boulghasoul, Elmostafa Elwarraki

Abstract: One of the most critical problems in induction motor drive is the knowledge of the current value of some induction motor parameters such as the rotor time constant, which depends strongly on temperature and frequency. This problem won’t be easy to solve b

Keywords: Induction Motor, Online Identification, High Gain Observer, Fuzzy Compensator, Rotor Time Constant, fault detection, Real Time Implementation, dSPACE 1104.

Title of the Paper: High Performance Speed Control of Direct Current Motors Using Adaptive Inverse Control

Authors: Aamir Hashim Obeid Ahmed

Abstract: At present, the control of a separately excited Direct Current (DC) motor is generally done by means of feedback. This paper proposes the speed control of a separately excited DC motor. The novelty of this paper lies in the application of Adaptive Inverse

Keywords: Adaptive Inverse Control, Adaptive Filters, Direct Current Motor, Speed Control

Title of the Paper: Nonlinear Control of Speed in a Water Pumping System Powered by PV Panels

Authors: Hassan Abouobaida, Mohamed Cherkaoui, Abdlmonime El Magri

Abstract: The present work describes the analysis, modeling and control of a cascade DC-DC power conditioning stage and AC-DC boost rectifier to control a speed of DC motor in water pumping systems. To maximize energy extracted from PV generator and control speed o

Keywords: MPPT, unity power factor, backstepping controller

Issue 3, Volume 7, July 2012

Title of the Paper: A New Electric Brush Cutter

Authors: Chieh-Tsung Chi

Abstract: To integrate power electronic control technology into the most mechanical mechanism of conventional internal combustion engine type has made it possible to design and implement a new electric brush cutter with blade rotation speed control and circuit protection functions. The mechanical power source of tradition mechanical grass cutter is based on a two or four strokes petrol engine. To obtain some very attracting advantages such as low vibration and acoustic noise, free of air pollution and low using cost, a DC motor is used as the mechanical power source of new electric type brush cutter. In addition, a Li-ion battery and electronic control board designed for DC motor speed control and circuit protection purposes were included as well. Designing ideas and the working principle of respective circuit in electronic control board will be explained. The performances of the proposed electric brush cutter were validated through extensive experiments and a laboratory scale implementation.

Keywords: Internal combustion engine, Electric brush cutter, DC motor, Li-ion battery

Title of the Paper: Experimental Set up Verification of Servo DC Motor Position Control Based on Integral Sliding Mode Approach

Authors: Ali Mohamed Yousef

Abstract: In this paper, a novel controller based on the Integral Sliding Mode Controller (ISMC) is proposed and designed for controlling DC motor in a servo drive. The modeling and analysis of the servo DC motor are obtained. To improve the controller performance in steady state (zero error), the integral sliding mode controller (ISMC) is designed and evaluated. Since the main drawback of SMC is a phenomenon, that called chattering resulting from discontinuous controllers. An ISMC with switched gains is used for chattering reduction and controller robustness. For comparison, the proposed ISMC with switched gains is compared with that of a PID controller. Experimental verification and simulations have been carried out in order to validate the effectiveness of the proposed scheme. The proposed controller offers very good tracking, also it is highly robust and controlled plant reached very fast to the final position. Furthermore the application of the SM ensures reduction of the system order by one. Also, quick recovery from matched disturbance in addition to good tracking. Moreover, this scheme is robust against the parameters variations.

Keywords: Servo DC motor, Integral sliding mode control, PID controller.

Title of the Paper: Predictive Voltage Control of Stand Alone Wind Energy Conversion System

Authors: Ahmed. M. Kassem

Abstract: This paper investigates the application of the model predictive control (MPC) approach to control the voltage and frequency of a stand alone wind generation system. This scheme consists of a wind turbine which drives an induction generator feeding an isolated load. A static reactive power compensator (SVAR) is connected at the induction generator terminals to regulate the load voltage. The rotor speed, and thereby the load frequency are controlled via adjusting the mechanical power input using the blade pitch-angle control. The MPC is used to calculate the optimal control actions including system constraints. To alleviate computational effort and to reduce numerical problems, particularly in large prediction horizon, an exponentially weighted functional model predictive control (FMPC) is employed. Digital simulations have been carried out in order to validate the effectiveness of the proposed scheme. The proposed controller has been tested through step changes in the wind speed and the load impedance. Simulation results show that adequate performance of the proposed wind energy scheme has been achieved. Moreover, this scheme is robust against the parameters variation and eliminates the influence of modeling and measurement errors.

Keywords: Wind turbine; induction generator; constrained predictive control; functional model predictive control

Title of the Paper: Coupling Effects and Decoupling for Supersonic Flight Vehicle

Authors: Tain-Sou Tsay

Abstract: In this paper, a nonlinear decoupling technique is used to design an aerodynamic coupled missile flight control system. The decoupling are get from multiplications of two measurable accelerations and three controllable output commands of the autopilot. They give exact sign and magnitude of aerodynamic coupling directly in missile manoeuvre. From frequency responses of coupling terms, decoupling terms and inner open-loop Bode diagram of the rolling channel, it will be seen that the decoupling and robustness for aerodynamic couplings can be obtained simultaneously. The time responses give same conclusions.

Keywords: Aerodynamic Coupling, Decoupling, Missile Flight Control

Issue 4, Volume 7, October 2012

Title of the Paper: Structure and Extrapolation of a Complex Error Function of Control System with Feedback

Authors: Oleg N. Agamalov

Abstract: In paper considered a new type of the feedback, based on structure and, subsequent, an extrapolation of a complex error function that used for design of a control system

Keywords: Hilbert transform; structure of a complex error function; extrapolation of a complex error function; Wirtinger derivative

Title of the Paper: Multi-Objective Optimization with Combination of Particle Swarm and Extremal Optimization for Constrained Engineering Design

Authors: Chen-Long Yu, Yong-Zai Lu, Jian Chu

Abstract: Engineering optimization problems usually have several conflicting objectives, such that no single solution can be considered optimum with respect to all objectives. In recent years, many efforts have focused on hybrid metaheuristic approaches for their robustness and efficiency to solve the above-mentioned multi-objective optimization problems (MOPs). This paper proposes a novel hybrid algorithm with the integration of particle swarm optimization (PSO) and bio-inspired computational intelligence extremal optimization (EO) for constrained engineering design, which combines the superior functionalities of PSO for search efficency and extremal dynamics oriented EO for global search capability. The performance of proposed PSO-EO algorithm is further tested on several benchmark MOPs in comparison with reported results. The simulations show that the PSO-EO is effective in solving MOPs, could result in faster convergence and better spread.

Keywords: Multi-objective optimization, Evolutionary algorithm, Particle swarm optimization, Extremal optimization, Pareto dominance, Engineering design

Title of the Paper: PID Controller Tuning Using Evolutionary Algorithms

Authors: Mohd S. Saad, Hishamuddin Jamaluddin, Intan Z. M. Darus

Abstract: This paper presents the implementation of PID controller tuning using two sets of evolutionary techniques which are differential evolution (DE) and genetic algorithm (GA). The optimal PID control parameters are applied for a high order system, system with time delay and non-minimum phase system. The performance of the two techniques is evaluated by setting its objective function with mean square error (MSE) and integral absolute error (IAE). Both techniques will compete to achieve the globally minimum value of its objective functions. Meanwhile, reliability between DE and GA in consistently maintaining minimum MSE is also been studied. This paper also compares the performance of the tuned PID controller using GA and DE methods with Ziegler-Nichols method.

Keywords: Differential Evolution, Genetic Algorithm, PID Controller, Ziegler-Nichols

Title of the Paper: Variable Structure Attitude Controller Design for Solely Magnetically Actuated Small Satellites Subject to Environmental Disturbances

Authors: Ahmet Sofyali, Elbrous M. Jafarov

Abstract: Sliding mode control algorithms with classical and modified discontinuous reaching laws for purely magnetic attitude control of small satellites are proposed and compared with each other in this work. They are designed by following the steps characteristic to the variable structure control method and the magnetic attitude control problem. The asymptotical stability of the control laws is proven by using theoretical and intuitive approaches together. The stability of the controllers is verified by converging simulation results of the states. The aim is to obtain a controller superior to the sliding mode magnetic controller with continuous reaching law in terms of steady state error under environmental disturbance effects. The time responses of Euler angles and angular velocities indicate that the aim is reached. The necessity of modifying the classical discontinuous reaching law is made clear by comparing states’ responses obtained by using the classical and the modified sliding mode algorithms.

Keywords: Magnetic attitude control, Satellite dynamics, Variable structure control, Sliding manifold