智能牵引机动力系统功率匹配与自适应控制

Power Matching and Adaptive Control of Intelligent Tractor Power System

为使智能牵引机在负载多变条件下动力系统功率匹配,需通过控制液压泵排量调节发动机转速。建立发动机与液压泵仿真模型,采取模糊控制策略制定发动机与液压泵反馈调节控制系统。利用MATLAB/Simulink建立发动机与液压泵动力系统功率匹配控制系统仿真模型,通过设置发动机油门开度、工作负载和发动机目标转速,仿真模拟牵引机实际施工操作。结果表明,在加入模糊控制系统反馈调节后,当油门开度为80%、发动机目标转速为1300 r/min时,发动机转速能稳定在目标转速附近,实现牵引机动力系统功率匹配与自适应控制。

In order to match the power system of the intelligent tractor under variable load conditions,it is necessary to adjust the engine speed by controlling the displacement of the hydraulic pump.The simulation model of engine and hydraulic pump is established,and the feedback control system of engine and hydraulic pump is developed by adopting fuzzy control strategy.The simulation model of power matching control system of engine and hydraulic pump power system was established by MATLAB/Simulink,and the actual construction operation of tractor was simulated by setting the engine throttle opening,workload and engine target speed.The simulation results show that when the fuzzy control system feedback adjustment is added,when the throttle opening is 80%and the target engine speed is 1300 r/min,the engine speed can be stabilized around the target speed,which realizes the power matching and adaptive control of the tractor power system.