Semi-active suspension for ride improvement using stability augmentation system control algorithm

This paper presents the simulation of a full-vehicle semi-active suspension system to simultaneously improve vehicle ride comfort. A validated 7-DOF of vehicle model was used to study the performance of passive suspension system and theoretical desired force for the designed semi-active suspension system. The control algorithm developed for the semi-active suspension known as stability augmentation system (SAS) was used to reduce the effect of disturbances to the dynamics performance of the vehicle. The SAS with inner ride control loops and outer attitude loops are combined together by the input decoupling transformation scheme (DTS) to improve ride. The performance of passive suspension and the semi-active suspension control are demonstrated by simulations.

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