Semi-active hydro-pneumatic suspension system of mining dump truck and control method

Abstract

The invention discloses a semi-active hydro-pneumatic suspension system of a mining dump truck and a control method, the system comprises a hydro-pneumatic spring, an acceleration sensor arranged on the hydro-pneumatic spring, a damping adjusting unit and a truck body height adjusting unit, and according to the method, the acceleration of mass on the hydro-pneumatic spring is measured through the acceleration sensor; the measured acceleration is compared with a set expected value, the output voltage is calculated and controlled through an ABC-BP neural network PID controller, the current of a two-position two-way electromagnetic proportional valve in the damping adjusting unit is changed, and then the opening degree of the damping adjusting unit is controlled, so that the damping force is adjusted in real time, the smoothness of the whole vehicle is improved. Meanwhile, opening and closing of a two-position three-way electromagnetic valve and a two-position two-way electromagnetic valve in the adjusting unit can be controlled, the height of a vehicle body is adjusted, rigid locking of the suspension is achieved, and the trafficability and loading safety of a vehicle are improved.

Description

technical field [0001] The invention relates to the field of mine dump truck suspension systems, in particular to a mine dump truck semi-active oil-gas suspension system and a control method. Background technique [0002] Mining dump truck is a heavy-duty dump truck used in open-pit mines to complete the tasks of rock and earth stripping and ore transportation. Mining point. Due to the extremely harsh driving conditions in the mining area, usually driving on muddy roads or even roadless conditions, the excitation of the road surface has a strong impact on the wheels, thus greatly affecting the ride comfort of the vehicle and the safety performance of the vehicle suspension. Impact. Due to its good stiffness and non-linear damping characteristics, the oil-pneumatic suspension can well match the driving conditions of the vehicle, thereby improving the ride comfort of the vehicle and the comfort of the driver, and can prevent the suspension stroke of the vehicle from being to...

AI Technical Summary

Problems solved by technology

However, due to the extremely harsh and changeable roads in the mining area, the range of damping and stiffness of the passive oil-gas suspension is limited, and it cannot be guaranteed that the suspension damping is at the optimal working damping in real time

Chinese patent CN106523574A discloses a damping adaptive oil-pneumatic suspension, which uses multiple pistons and air chambers to realize multi-stage damping adjustment of the oil-pneumatic suspension without introducing additional control force, but the structure is relatively complicated and the reliability is not good. high

Images