Research on Multi-mode Control Strategy of ISD Suspension Based on Simulink/Stateflow

Based on the three-element parallel "Inerter-Spring-Damper" suspension (ISD suspension) configuration, combined with the design idea of parameter switching in the semi-active suspension, a multi-mode switching is designed to solve the problem of poor low-frequency vibration response of traditional passive suspension. The vehicle parameters in the actual state are analyzed, and the operating conditions of each working mode and the boundary conditions of mode switching are determined. The finite state machine (FSM) theory is used as the theoretical basis for control strategy modeling, and the logic rules for mode switching are established by using the Simulink/Stateflow module. The simulation results show that the semi-active suspension mode based on multi-mode switching control reduces the root-mean-square value of the suspended mass acceleration by 3.77% and 2.52%, respectively.