【作者】 叶巧灵； 李繁飙； 彭浩； 吴政； 杜城龙；

【Author】 YE Qiao-Ling;LI Fan-Biao;PENG Hao;WU Zheng;DU Cheng-Long;School of Automation, Central South University;Peng Cheng Laboratory;

【机构】 中南大学自动化学院； 鹏城实验室；

【摘要】 飞机防滑刹车系统的控制目标是在特性的稳定区域内,通过跟踪最佳滑移率信号,以获取最优的减速效果.本文提出了一种基于二阶跟踪微分器的刹车系统滑模控制策略,仅根据可实时测量的滑行距离,设计二阶跟踪微分器来同时完成飞机纵向速度及飞机纵向加速度的状态估计,估计误差的收敛条件以及微分器的增益选择由Lyapunov稳定性分析方法得到.通过在不同跑道状态下进行模拟仿真,验证了本文提出的滑模控制策略能很好的适应飞机刹车过程中的非线性因素,均可实现对最优滑移率的跟踪控制.更多还原

【Abstract】 The objective of the ABS is to regulate the wheel slip ratio operating within the stable region of characteristics. It is impossible to directly obtain accurate aircraft speed and acceleration. In this paper, a second-order differentiator is designed to estimate the longitudinal velocity and acceleration of the aircraft at the same time with the available slip distance information. The convergence condition of the estimation error is obtained by Lyapunov stability analysis method, and the gain of the observer is therefore determined. Finally, through the simulation under different runway conditions, it is verified that the sliding mode control strategy proposed in this paper can realize the tracking of the optimal slip rate under different runway conditions, and significantly improve the braking efficiency.更多还原