Semi-active Suspension of a Full-vehicle Model based on Double-loop Control

A seven-degree-of-freedom full-body dynamic model of vehicle semi-active suspension using a double-loop control is established.The control consists of inner loop and outer loop control.The inner loop control obtained by using fuzzy control isolates sprung mass vibration from usprung mass occilication induced by uneven terrain.The outer loop control obtained by the linear control stabilizes the motion and provides the attitude control of the sprung mass.A variable converter is also designed to blend the inner and the outer loop,and to complete the coordinated control for the full vehicle.The simulation results indicate that the proposed control is very effective in the vibration isolation.