摘要
针对一类非匹配不确定非线性系统,设计了一种高阶鲁棒自适应反推滑模变结构控制方法。在控制器设计中,考虑存在系统建模误差和外界未知干扰,借鉴动态面思想降低控制器复杂性,引入双曲正切函数和抖振衰减因子降低控制输入抖振,设计系统建模误差自适应律增强控制器鲁棒性,并将系统的稳定性证明简化为判断一个n阶对称矩阵的正定性问题。将设计的反推滑模控制器用于F-8飞机纵向机动控制并进行仿真,实现了飞机对指定轨迹的稳定跟踪。
A. robust adaptive hackstepping sliding mode control （SMC） method is proposed for matched uncertain nonlinear systems. In the procedure of controller design, model uncertainty and ternal disturbances are considered. In order to simplify the controller, dynamic surface strategy is ing the backstepping. The chattering of control signals is effectively suppressed by the employment bolic tangent function and attenuation factor. An adaptive law is designed to strengthen the system a class of un- unknown ex- adopted dur- of the hyper- robustness for modelling error. The stability of the system is ascribed to the design of an n order positive symmetrical matrix. The proposed control method is applied to the F 8 aircraft longitudinal dynamical model. The simulation results demonstrate that the proposed method can be effectively applied to the control of aircraft trajectory tracking.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2014年第4期740-745,共6页
Systems Engineering and Electronics
基金
航空科学基金(20111396011)
陕西省自然科学基金(2012JM8035)资助课题
关键词
不确定非线性系统
滑模控制
飞行器纵向机动
轨迹跟踪
uncertain nonlinear systems
sliding mode control （SMC）
aircraft longitudinal motion
trajectory tracking
