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An energy-regenerative vehicle suspension is proposed. Permanent-magnet direct-current motors are utilized as the active actuators in automotive suspension. The significant characteristic of the suspension is that vibration energy from the road excitation can be regenerated and transformed into electric energy while good suspension performance can be maintained. The modeling of electrical suspension system has been completed and simulated in Matlab/Simulink. The motor actuator working as a generator is proved to maintain the performance of vibration control and energy-regeneration. The prototype of motor actuator is designed and made. The vibration absorption and regeneration performances are verified by full-vehicle experiments.

An electrical active roll stabilizer has been designed and developed for improving the vehicle anti-roll performance. The motor actuator composed by a switched reluctance motor(SRM) and a harmonic gear reducer is a key component of the active roll stabilizer to generate the active anti-roll torque. There are three main steps of studying the performance of the motor actuator in this paper. Firstly, the accurate mathematical model of SRM is built in Matlab/Simulink using the data of magnetization characteristics calculated by the finite element analysis using Maxwell/RMxprt. Secondly, the full vehicle roll model is set up and the sliding mode controller based on feedback linearization for roll control is designed in Matlab/Simulink. The controller calculates the real-time ideal anti-roll torques of the front and rear stabilizers based on the lateral acceleration and roll angle.