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| Performance simulation and testing of multi-levels-damping adjustable hydraulic shock absorber |
| 1.School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.School of Mechanical Engineering, Hunan Institute of Technology, Hengyang, Hunan 421002, China |
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Abstract The adjustable damping of traditional damping adjustable shock absorber was achieved mainly by changing throttle opening area with single work mode and limited damping adjustable range. In order to enhance the adjustable damping work mode and the adjustable range, a shock absorber with various state switching was designed based on a passive hydraulic shock absorber. In order to analyze the performance, a mathematical model for multilevelsdamping adjustable hydraulic shock absorber was established based on fluid mechanics and thermodynamics. The relation among shock absorber output force, piston travel and piston frequency was analyzed by Simulink simulation software and compared with the damping performance of adjustable shock absorber by bench test. The results show that the damping force deviation between test results and simulation results is small. The multi-levels-damping states of shock absorber change obviously with high switching control accuracy of damping state, which provides a basis for semi-active suspension control system.
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Received: 12 April 2012
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2013, Vol. 34 
