In this paper, a parallel control method based on structure characteristic of a half vehicle suspension with six degree freedoms is presented. Based on force analysis of the sprung mass, the coupling quantitative relation of the front and rear quarter suspensions is deduced and a hierarchical model is founded. Then a hierarchical vibration control algorithm is constructed. The vertical and pitch accelerations of the suspension center are treated as central control objects. The Hinfinite and Linear Quadric Gaussian control strategy is respectively adopted by two local controls formed by the front and rear quarter suspensions and harmonized by central control. The simulation results under MATLAB environment show that the computation time of control procedure is shortened compared to traditonal model. Thus exhaustive control could be realized according to road excitation so as to improve ride quality.
