Abstract
The working environment of mining dumping truck is poor and in order to improve the vibration reduction effect of mining dump trucks, a vehicle damping adjustable semi-active suspension based on connected hydro-pneumatic suspension is proposed. The 8 DOF model of hydro-pneumatic suspension and complete vehicle was established for mining dump truck. The fuzzy PID control method is used to optimize the smoothness of the vehicle by controlling the vertical acceleration of the truck, pitch angle acceleration and seat vertical acceleration. The damping performance of semi-active suspension is analyzed by Matlab/Simulink software. The simulation results show that compared with the passive suspension under the condition of random road power spectrum input, the root mean square values of the vertical acceleration of the truck and the vertical acceleration of the seat of the semi-active suspension are reduced by 25.76% and 48.7%. At the same time, the effect of vehicle vibration reduction is also obvious under the different speeds.
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