中文摘要：

为了实现装备多段液压机械无级变速器（HMCVT）拖拉机按目标速度行驶的控制,对装备多段HMCVT拖拉机的模糊自适应PID控制进行了研究。基于Matlab/Simulink平台建立了装备多段HMCVT拖拉机传动系统动力学模型和模糊自适应PID控制模型。根据实际车速和设定车速的实际偏差采用模糊控制的方法自动整定PID控制参数,从而达到车速控制的目的。在拖拉机动力学模型上对模糊自适应PID控制仿真并与PID控制仿真对比,结果表明装备多段HMCVT拖拉机的模糊自适应PID控制具有更强的自适应能力和鲁棒性。

英文摘要：

In order to realize the control for multi - range hydro - mechanical continuously variable trans- mission （HMCVT） in tractor, the fuzzy adaptive PID control for multi- range HMCVT in tractor is studied. The transmission system dynamics model of tractor and fuzzy adaptive PID control model are established based on Matlab/Simulink platform. According to the actual deviation of the actual vehicle speed and the target vehicle, the fuzzy control method is adopted to automatically adjust the PID control parameters, so as to achieve the purpose of control. The fuzzy adaptive PID control simulation on the tractor dynamics model and comparison with the PID control simulation. The results show that the stronger adaptive ability and robustness of fuzzy adaptive PID control of tractor.