Vibration isolation performance of energy-regenerative semi-active suspension with variable stiffness and damping

The vibration isolation performance of energy-regenerative semi-active suspension with variable stiffness and damping is investigated. A quarter car model with one degree of freedom with semi-active suspension model is used as the research subject. First, the magnitude frequency response characteristics of the model to road bumpiness excitation and external force excitation are analyzed. Then, a simple switch on-off damping control algorithm is designed based on the skyhook control method. Nine different on/off control modes are defined subsequently. Finally, with the input of sinusoidal function and random vibration, the control performances are simulated and compared using Matlab/Simulink. The results show that the control modes, which have on-off status for both variable dampers, lead the suspension to have excellent performance of vibration isolation. © 2017, Editorial Board of Jilin University. All right reserved.