飞机防滑刹车模糊滑模变结构控制研究

摘要

Sliding-mode variable structure control has good rapidity and strong robustness, which is very suitable for the complex working environment of aircraft braking system, but its inherent chattering problem needs to be solved urgently.In order to deal with the high nonlinearity of aircraft braking system, we design a fuzzy sliding-mode varia-ble structure controller.Based on sliding-mode variable structure control, additional control is realized through ad-justment with fuzzy logic, which can make the control signal smooth, weaken the chattering and improve the quality of control.The simulation results and their analysis indicate preliminarily that the anti-skid braking system can track the optimal slip ratio well and the control method is reasonable and effective.%滑模变结构控制具有好的快速性和强的鲁棒性，非常适合工作环境复杂的飞机刹车系统，但其固有的抖振问题亟待解决。针对飞机防滑刹车系统的高度非线性，设计了一个模糊滑模变结构控制器。在滑模变结构控制基础之上，通过模糊逻辑的调节作用实现附加控制，柔滑控制信号，削弱抖振，提高控制品质。仿真结果表明，飞机防滑刹车系统能够很好地跟踪最佳滑移率，控制方法合理有效。