The Performance of a Vehicle active suspension system ysing an optimal variabke structure control theory is investihated. The full car model has a 7 DOF which accounts for heave, pitch, roll motions of a sprung mass and vertical motions of 4 unsprung ...
The Performance of a Vehicle active suspension system ysing an optimal variabke structure control theory is investihated. The full car model has a 7 DOF which accounts for heave, pitch, roll motions of a sprung mass and vertical motions of 4 unsprung masses. The transient responses are analyzed when a vehicle passing through a bump with a constant speed and the frequency responses are analyzed for heave, pitch, roll, warp inputs at four wheels ln RMS domain. the two types of correlations are considered to compute the mean square responses of a vehicle to random road disturbance. l.e., the comelation between the left and right tracks. and the time delay between the front and rear wheels. A modified first-order shaping filter suggested by Rill ls used to account for the comelation between the left and right tracts. lt is shown that the optimal variable structure controller gives better performance of the vehicle active suspension system than an optimal controller.