Suspension Performance Analysis of a Half Car Model with a Fluid Inerter

As a new type of vibration isolation component, inerter has great potential in improving the performance of vibration isolation system. In this paper, a half car model is taken as the research object, and three suspension structure models with inerter are studied. Particle swarm optimization algorithm is used to optimize the parameters of inerter suspension. The performances of the three inerter suspensions are compared with those of the traditional suspension in terms of body acceleration and pitching angular acceleration. The simulation results show that compared with the traditional suspension, the performance of the suspension system with inerter has been significantly improved. In addition, the dynamic model of fluid inerter including friction force, parasitic damping force and inertial force is established, and the nonlinearity of fluid inerter is analyzed in frequency domain and time domain.