Abstract
To reduce energy consumption or improve energy efficiency, the regenerative devices recently have drawn the public’s eyes. In this paper, a novel hydraulic energy-regenerative shock absorber (HERSA) is developed for vehicle suspension to regenerate the vibration energy which is dissipated by conventional viscous dampers into heat waste. At first, the schematic of HERSA is presented and a mathematic model is developed to describe the characteristic of HERSA. Then the parametric sensitivity analysis of the vibration energy is expounded, and the ranking of their influences is k1≫m2>m1>k2≈cs. Besides, a parametric study of HERSA is adopted to research the influences of the key parameters on the characteristic of HERSA. Moreover, an optimization of HERSA is carried out to regenerate more power as far as possible without devitalizing the damping characteristic. To make the optimization results more close to the actual condition, the displacement data of the shock absorber in the road test is selected as the excitation in the optimization. The results show that the RMS of regenerated energy is up to 107.94 W under the actual excitation. Moreover it indicates that the HERSA can improve its performance through the damping control.
Highlights
With the energy consumption rising rapidly, the energy crisis is being more and more urgent
Through an overall consideration, the optimization could improve the performance of hydraulic energy-regenerative shock absorber (HERSA), and it showed the semiactive control of HERSA was feasible
This paper presented a novel hydraulic energy-regenerative shock absorber based on the traditional telescopic shock absorber
Summary
With the energy consumption rising rapidly, the energy crisis is being more and more urgent. Singh and Satpute [8] designed an electromagnetic energy harvesting shock absorber, and a simulation with actual road excitation data indicated that the system could harvest 15 W of the average power from each wheel. The results indicated that the harvesting power from vehicle suspension was proportional to tire stiffness and road vertical excitation spectrum. Wang et al [12] designed a regenerative hydraulic shock absorber system which converted oscillatory motion of a vehicle suspension into unidirectional rotary motion of a generator. An optimal analysis was developed to improve performance of ride comfort and road holding. Huang et al [20] proposed a systematic methodology for predicting and optimizing the performance of an energy regeneration suspension system to efficiently capture the vibratory energy induced by the road irregularities. Thereafter, a parameter study and an optimization of HERSA are designed to improve the performance of it
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