Cooperative compensation control for a novel semi-active electromagnetic suspension integrating with variable damper and variable inertance

Conventional variable damping suspension can only do negative work, so that its performance is limited. Although the advanced variable inertance suspension can make up for this deficiency to a certain extent, it has disadvantages in reducing the resonance peak. Therefore, a novel Variable Damping and Variable Inertance Electromagnetic Device (VDVIED) for vehicle suspension in this paper is proposed and its damping and inertial characteristics can be equivalently regulated in real time by adjusting the circuit resistance. The dynamic model of VDVIED is developed and integrated into a quarter-vehicle suspension model. An H∞ controller is designed based on this model to obtain the desired control force. And then, a self-sensing based cooperative compensation control strategy for synergistically controlling damping force and inertial force is proposed to more precise track the desired control force. The bench tests for characteristic verification and performance evaluation of VDVIED were carried out. The experimental results demonstrate that the proposed VDVIED can adjust the damping and inertial characteristics of suspension in real time, and its vibration damping performance is significantly better than that of passive suspension, as well as variable damping suspension and variable inertance suspension by using the proposed cooperative compensation control strategy.