前轮操纵系统是大型飞机实现地面滑行机动和按预定轨迹起降控制的关键系统之一。针对轮胎转向时复杂的负载特性以及电液伺服系统自身存在的非线性和参数不确定性的特点,基于滑模控制理论,结合Lyapunov稳定性理论,给出了飞机前轮转向滑模控制方案,并进行了数字仿真。结果表明,所设计的滑模控制器具有鲁棒性强、结构简单、易于实现的优点。 The front wheel steering system is one of the key systems for large aircraft to achieve maneuvering on the ground and take off and land control according to a predetermined trajectory. Aiming at the complicated load characteristic of tire turning and the nonlinear and parameter uncertainties existing in the electro-hydraulic servo system itself, the control scheme of the front wheel steering sliding mode is given based on the sliding mode control theory and the Lyapunov stability theory. And conducted a digital simulation. The results show that the designed sliding mode controller has the advantages of strong robustness, simple structure and easy implementation.