CHEN Dong-yun1, YANG Li-kang1,2, CAI Ming-long2

(1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014; 2.School of

Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China)

Abstract: Aiming at the energy-regenerative active suspension is faced with the problem of lower energy recovery efficiency and the limit dynamic performance, which can not satisfy the modern advanced car with overall performance requirements of harvesting energy and vibration reduction. To optimize the actual structure and the vibration control algorithm, the actual recycled vibration energy should be estimated. Therefore, a vibration energy power flow calculation method was put forward. Focused on the energy-regenerative active suspension of linear motor,and with the same amplitude, the different frequency of the sinusoidal road excitation, the relationship between body acceleration root means square value and harvesting energy was calculated through Matlab simulation analysis.The results indicate that the worse road excitation, the greater the recovery of energy, up to 1.4kW with 25% harvesting energy efficiency. At the same time, the riding comfort is worse. The calculation method provides the theoretical practical reference of the design of energy-regenerative active suspension parameters and active control algorithm,meeting the requirements of a certain riding comfort of the vehicle when recycle more energy and improve the harvesting energy efficiency at the same time.

Key words: energy-harvesting suspension;linear motor;power flow;harvesting energy calculation