Abstract: Nonlinear control methods are presented based on theory of
sliding mode control (SMC) or variable structure control (VSC)
for application to active automobile suspensions. Requirements
of reducing manufacturing cost and energy consumption of the
active suspension system may be satisfied by reasonable design
of the sliding surface and hydraulic servo system. Emphasis is
placed on the study of the discrete sliding mode control method
(DSMC) applicable for a new sort of speed on-off solenoid valves
of antidust capability and low price. Robustness and
effectiveness of the feedback linearized controller in typical
road conditions are demonstrated by numerical results for a
quarter-car suspension model.
Key words: Automobile
suspension Siding mode control Nonlinear dynamics
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This work is
supported by the Ford China Research & Development Fund of Ford Motors
Company and National Natural Science Foundation of China. Manuscript
received on January 29, 1997; revised manuscript April 15, 1997
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