Study On The Design And Test Of Automobile Suspension With Hydraulic Inerter

Inerter can possess great inertia with low mass, which is called "virtual mass". Introducing the inerter to the automobile suspension with its characteristic of "virtual mass" can not only enrich the network structure of automobile suspension, but also provide some new approaches to research vehicle suspension, and at the same time, a series of new topics are put forward. In this paper, the ISD suspension vibration isolation mechanism was studies, and a new type of ISD suspension system was designed. The frequency characteristic of this new suspension was analyzed, the key technology of the suspension applying in automobile was researched. And the performance of automobile suspension was improved with inerter.Six kinds of generalized mechanical network system based on "inerter-spring-damper" are analyzed on amplitude-frequency characteristic with their single quality model. And the connection law among "inerter-spring-damper" was summarized. And in the last, an excellent suspension was designed.The four parameters, auxiliary spring stiffness, inerter coefficient, auxiliary damping coefficient, and main damping coefficient, influencing on the amplitude-frequency characteristic was analyzed. The method, multi-objective genetic algorithm, was proposed to optimize and determine the parameter of ISD suspension.The integration design scheme of the inerter and damper was put forward, and the scheme feasibility was verified through the modeling and simulation analysis.The prototype of the ISD suspension was exploited, and the relevant test system of the ISD suspension was set up. Sine and random road simulation test was completed. The result shows that ISD suspension can effectively improve the frequency characteristics of the vehicle suspension, and better the ride comfort, but worsen the suspension travel and tire dynamic load in a certain degree.