Dynamic performance analysis of hydraulic isd suspension based on virtual prototype model

Abstract

Suspension is an important assembly of vehicle. The emergence of inerter opens up a new direction and field for the development of automotive suspension technology. To study the performance of hydraulic "inerter-spring-damper (ISD)" suspension, on the basis of test prototype, a virtual prototype model of vehicle ISD suspension and hydraulic inerter model are established respectively. Co-simulation is carried out to analyze the dynamic performance of hydraulic ISD suspension with stochastic-road spectrum input and pulse road spectrum input. The principle prototypes of hydraulic inerter and ISD suspension are designed and its four-channel tyre coupling road simulation bench test is performed. The results show that the hydraulic ISD suspension has better vehicle dynamic performance in contrast to the traditional passive suspension, and root mean square values of vertical acceleration of the centre of body mass, pitching angle acceleration, roll angle acceleration, dynamic schedule of the left front suspension and dynamic load of the left front tire decline obviously. The hydraulic ISD suspension can inhibit body's vibration, control the posture of body effectively and coordinate the contradiction between vehicle's ride comfort and driving safety.