Output feedback based Robust Control for Half-Car Hydraulic Active Suspension System

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (7) : 187-193.

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LI Rong，JIAO Xiao-Hong，YANG Chao

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Abstract

Robust disturbance attenuation problem based on output feedback is investigated for the half-car hydraulic active suspension system. First, the dynamic model of the half-car hydraulic active suspension system is established. Then, in the light of direct measurement not suitable for the position and velocity of car body, the pitch angle and angular velocity automobile body, the position and velocity of front- and rear-wheels, besides, nonlinearity and external disturbance, a dynamic output feedback control strategy with robust disturbance attenuation is proposed. The effectiveness of the designed controller is demonstrated by both theoretical analysis and simulation results. By comparison with the conventional PID algorithm, the improvement in ride comfort as well as the enhancement in handling and stability of vehicle can be further achieved by the controller in this paper.

Key words

active suspension system / unmeasured states / nonlinearity / dynamic output feedback / disturbance attenuation / robust control

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LI Rong;JIAO Xiao-Hong;YANG Chao. Output feedback based Robust Control for Half-Car Hydraulic Active Suspension System[J]. Journal of Vibration and Shock, 2014, 33(7): 187-193