Design and Performance Analysis of ISD Suspension Based on New Mechanical Network Isolation Theory

By analysing the vibration response of two mutual coupling structures between three basic elements 'spring, damper and inerter' on a single degree of freedom system. Focusing on the vibration isolation effect, the optimum coupling relationship of 'spring, damper and inerter' three basic components applied in vehicle suspensions was studied. According to that, three kinds of ISD (Inerter-Spring- Damper) suspension structures were put forward. To verify the validity of the designed structures, building the quarter vehicle ISD suspension model of three chosen structures in matlab/simulink. In order to avoid the traditional genetic algorithm falling into local optimum, using quantum genetic algorithm to optimize the spring stiffness, damping coefficient and inertance in terms of vehicle body acceleration, suspension travel and dynamic tire load. Simulation results show that the performance of vehicle body acceleration mean square root, suspension travel mean square root and tire dynamic load mean square root were decreased at the same time compared to traditional passive suspension. Furthermore, the optimum coupling relationship of 'spring, damper and inerter' three basic elements applied to vehicle suspension is that spring and damper are available in series and parallel, inerter and spring should be in parallel, inerter and damper should be in series.