Isolation and energy-regenerative performance experimental verification of automotive electrical suspension

Current hydraulic active suspension system has several defects such as slow response, high energy consumption and complex structure. An energy-regenerative electrical suspension was adopted whose motor actuator is composed of a permanent-magnet direct-current motor, a ball screw and a nut. The significant characteristic of the suspension is that it can regenerate the vibration energy from the road excitation and transform it into electric energy and meanwhile maintain good isolation performance. The prototype was designed and produced based on the rear suspension structure of a typical passenger car. The performance tests of the DC motor were carried out. The regeneration and vibration control performances were verified by the full-vehicle experiments in the IST roadlab four post rig. The experimental results of the electrical system working as a passive suspension system show the feasibility of vibration energy regeneration.