基于全程滑动模态的变结构制导律研究  

Study of Variable Structure Guidance Law Based on Global Sliding Mode

作　　者：郑钰[1] 罗继勋[1] 旷艾喜 熊飞[3] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]空军装备部外场部,北京1008432 [3]西北工业大学自动化学院,陕西西安710129

出　　处：《计算机测量与控制》2011年第12期3012-3015,共4页Computer Measurement &Control

基　　金：航空科学基金(20095196013)

摘　　要：针对不确定性定常系统,在非线性运动学基础上,提出了一种基于全程滑动模态的制导律;该方法将目标机动加速度视为有界干扰,并在控制律中引入与状态有关的变因子项,改善了系统的瞬态性能,消除了能达阶段,克服了未知参数摄动的影响,提高了系统的鲁棒稳定性;比较了相同初始条件下基于全程滑动模态的变结构制导和比例制导的脱靶量、视线角速度及控制律;结果表明,基于全程滑模动态的变结构制导律具有精度高、鲁棒性强以及便于工程设计的特点。Invariant for the constant linear system with uncertainly based on the nonlinear kinematics. Proposed a guidance law by using global sliding mode method. This approach is considered the maneuvering acceleration of target is regarded as a disturbance with boundary, in the control law and the state of the introduction of the introduction of variable factors, improve transient performance of the system, improve the robustness of the system. The same initial conditions were compared based on global sliding mode method variable structure guid ance and proportional guidance of miss distance, line of sight angular velocity and the control low. The results show that the dynamics of global sliding mode variable structure guidance law with high accuracy, robustness and ease of engineering design features.

关 键 词：制导律 全程滑动模态 不确定系统 变因子项 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]