In this paper, we carry out the preparatory work for the national "863" project, "two degrees of freedom articulated off-road vehicle" , develop a hydraulic active suspension system witch have the adaptive capacity to the ground.

WTThe weighted functions are selected to design the frequency-domain specifications,the H_∞ control algorithm based on the linear matrix inequalities(LMI) is applied to the design of the electrohydraulic active suspension in the 4 degree-of-freedom half-vehicle model,and the H_∞ linear output-feedback controller is devised.

This paper establishes a vehicle mathematical model of hydraulic suspension of 1/4 body.

When the combinable heavy multi-axis trailer with full load smoothly runs on the straight road,simulate the lifting process of the hydraulic suspension system,get the max pressure of the suspension components,make its three-dimensional model.

Effects of mixed-uncertainty on ride quality for a heavy duty vehicle mounted hydro-pneumatic active suspensions;

Order-reduction of H-infinity controller for the active suspension system of vehicle;

H_∞/generalized H_2 control of active suspension based on moving horizon strategy;

Modeling and simulation of the integrated control system of EPS and active-suspension of vehicles;

Model-following variable structure control for active-suspension in vehicle

Linear-Quadratic-Gaussian(LQG)optional regulator theory is applied to optional control of active-suspension based on quarter vehicle dynamics mod el of active-suspension.