A hydraulic and pneumatic suspension was introduced to reduce the vehicle roll angle during cornering. A two-track vehicle model was used to dynamically analysis the body motion of the vehicle. The modelling and simulation of the suspension are validated with experiment. The design of the sliding-mode controller is introduced. The simulation results of the suspension with different control methods were compared. The results show the performance of active suspension with sliding-mode control is superior to that of a passive system. The sliding-mode controller leads to lower power consumption and longer lifetime of valve actuators of the suspension.
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Li et al. (2009) studied this question.