Browsing by Author "Cheng, JW"

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Chaos anticontrol and synchronization of three time scales brushless DC motor system
(2004-12-01)
Ge, ZM
;
Cheng, JW
;
Chen, YS
;
機械工程學系
;
Department of Mechanical Engineering
Chaos anticontrol of three time scale brushless dc motors and chaos synchronization of different order systems are studied. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. By adding constant term, periodic square wave, the periodic triangle wave, the periodic sawtooth wave, and kxx term, to achieve anticontrol of chaotic or periodic systems, it is found that more chaotic phenomena of the system can be observed. Then, by coupled terms and linearization of error dynamics, we obtain the partial synchronization of two different order systems, i.e. brushless DC motor system and rate gyroscope system. (C) 2004 Elsevier Ltd. All rights reserved.
Chaos synchronization and parameter identification of three time scales brushless DC motor system
(2005-04-01)
Ge, ZM
;
Cheng, JW
;
機械工程學系
;
Department of Mechanical Engineering
Chaotic anticontrol and chaos synchronization of brushless DC motor system are studied in this paper. Nondimensional dynamic equations of three time scale brushless DC motor system are presented. Using numerical results, such as phase diagram, bifurcation diagram, and Lyapunov exponent, periodic and chaotic motions can be observed. Then, chaos synchronization of two identical systems via additional inputs and Lyapunov stability theory are studied. And further, the parameter of the system is traced via adaptive control and random optimization method. (C) 2004 Elsevier Ltd. All rights reserved.