Abstract:For the traditional adjustable mechanism of controllable suspension system, there exists a dilemma with sophisticated model construction, high accuracy and high energy consumption. To address this problem, this paper proposes a multi-stage adjustable hydro pneumatic suspension (HPS) structure with control method based on high-speed on-off solenoid valve. Two stiffness modes and four damping modes are realized by controlling the states of four high-speed on-off solenoid valves in the hydro pneumatic suspension, and incorporated with the vibration characteristic mechanism of the new hydro pneumatic suspension, a mathematical model which can accurately reflect its characteristics is established. The key component parameters of the new hydro pneumatic suspension are designed according to the vehicle parameters, while the static and dynamic output characteristics of the hydro pneumatic suspension are verified by simulation and test. Furthermore, the particle swarm optimization (PSO) algorithm is utilized to optimize the stiffness and damping of hydro pneumatic suspension under different profiles, and the mode switching control method is designed to obtain the optimal switching sequence of stiffness and damping under variant working conditions. The simulation results show that compared with the passive hydro pneumatic suspension, the root mean square value of the body vibration acceleration of the new stiffness damping multi-mode switching hydro pneumatic suspension system is reduced by 33.3%, the root mean square value of the suspension dynamic deflection is reduced by 29.6%, and the root mean square value of the wheel dynamic load is reduced by 9.36%, which can effectively improve the vehicle vibration isolation performance.
汪少华,翟旭辉,孙晓强,施德华,殷春芳. 车辆刚度阻尼多级可调式油气悬架系统分析及控制研究[J]. 振动与冲击, 2022, 41(12): 168-177.
WANG Shaohua,ZHAI Xuhui,SUN Xiaoqiang,SHI Dehua,YIN Chunfang. Analysis and control of a vehicle hydro pneumatic suspension system with multistage adjustable stiffness and damping characteristics. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(12): 168-177.
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