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K.Rajeswari K.Rajeswari
P.Lakshmi P.Lakshmi


This paper presents a Sliding Mode Observer (SMO) design for quarter car model of an active suspension system. Sliding surface control law using the estimated states is applied to the quarter car model. Control using estimated states is shown to yield ride quality improvement. The performance of Sliding Mode Control (SMC) with SMO is compared to an optimal controller with Luenberger observer. Simulation results show the superiority of the sliding mode observer and control.

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