反馈线性化与滑模控制方法在汽车AMT中的应用

Application of Feedback Linearization and Sliding Mode Control to AMT of Vehicles

以汽车机械式自动变速系统(AMT)的离合器接合过程为研究对象,建立起离合器动力学系统与控制系统的数学模型,进一步应用基于微分几何的反馈线性化方法,将原非线性系统等价为完全可控线性系统,然后设计了滑模控制器。仿真结果表明,该方法比传统PID控制具有更高的跟踪精度,更快的响应速度,更强的抗干扰能力。

An investigation was made to the clutch engagement of automatic mechanical transmission (AMT) systems for automobiles during start-up, and further for the control purpose a dynamic system and control model was proposed according to the characteristics of the clutch engagement. By means of the feedback linearization procedure of differential geometry, an equivalent, fully controllable and linear model was derived via a homomorphic transformation and a sliding mode controller was constructed for the AMT clutch system. Computer simulation results showed better tracking accuracy, rapider response, and stronger robustness by sliding mode controller than by PID controller.