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ON CONTROLLING A CHAOTIC VEHICLE DYNAMIC SYSTEM BY USING DITHER  

Chang, S.C. (Department of Mechanical and Automation Engineering, Dayeh University)
Publication Information
International Journal of Automotive Technology / v.8, no.4, 2007 , pp. 467-476 More about this Journal
Abstract
This work verifies the chaotic motion of a steer-by-wire vehicle dynamic system, and then elucidates an application of dither smoothing to control the chaos of a vehicle model. The largest Lyapunov exponent is estimated from the synchronization to identify periodic and chaotic motions. Then, a bifurcation diagram reveals complex nonlinear behaviors over a range of parameter values. Finally, a method for controlling a chaotic vehicle dynamic system is proposed. This method involves applying another external input, called a dither signal, to the system. The designed controller is demonstrated to work quite well for nonlinear systems in achieving robust stability and protecting the vehicle from slip or spin. Some simulation results are presented to establish the feasibility of the proposed method.
Keywords
Chaos; Steer-by-wire; Synchronization; Lyapunov exponent; Dither;
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