【摘要】 针对拖拉机阻力控制系统这一复杂非线性系统，通过分析与实验确立了系统模型结构，并进而运用广义最小二来辨识方法（RGLS）建立了其完整的数学模型，从而认定了该系统是一个含死区非线性环节的三阶闭环系统。更多还原

【Abstract】 The indoor imination test system of the tractor draught control system is established. Then,by analyse and experiment the structure of the system model is sured and the global model is set up with the method of system identification.Thus,it is confirmed the tractor draught control system is a third-order closed loop system wiht a deadband element.更多还原