基于联合仿真的全液压驱动履带车辆转速感应控制策略

Speed Sensing Control Strategy of Fully Hydraulic Driven Tracked Vehicle Based on Co-simulation

为解决某型全液压驱动履带车辆工作负荷多变,发动机输出功率与行走液压系统吸收功率匹配不合理等问题,提出基于联合仿真环境的发动机转速感应控制策略设计方法。利用AMESim软件对发动机、行走液压系统以及控制器进行建模,设计了以发动机稳定转速为控制目标的泵-马达变量调节算法,并利用RecurDyn(LM)软件对整车动力学模型和行驶路面进行建模,对车辆变负荷行驶工况进行了联合仿真分析。结果表明:该控制算法能够根据负荷变化实时调节变量泵、变量马达的排量,使发动机稳定工作在最佳燃油经济转速区得以实现。

In order to solve the problems of a fully hydraulic driven tracked vehicle,such as variable workload and unreasonable matching between the engine output power and the absorbed power of the vehicle hydraulic system,a design method of speed sensing control strategy based on co-simulation environment is put forward.The AMESim software is used to model the engine,the vehicle hydraulic system and the control unit,and the pump-motor displacement control algorithm is designed with the stable speed of the engine as the control objective.The Recur Dyn(LM)software is used to model the vehicle dynamics model and the driving road surface,and the vehicle variable load driving condition is jointly simulated and analyzed.The results show that the control algorithm can adjust the displacement of the variable pump and variable motor in real time according to the load change,so that the engine can work stably in the optimal fuel economy speed zone.