基于自适应鲁棒反演的固体动能拦截器姿态跟踪控制

发布时间：2018-04-23 02:12

本文选题：动能拦截器 + 变推力控制　；参考：《固体火箭技术》2016年05期

【摘要】：针对固体动能拦截器姿控发动机推力恒定、分散式布局控制力矩的强耦合特性及系统模型存在不确定特点的拦截器姿态稳定跟踪控制问题,提出了一种基于自适应鲁棒反演的新型姿态控制器设计方法。充分考虑姿态控制系统中三通道及姿控推力间的相互耦合关系,建立了姿态控制耦合模型,利用反演及滑模方法设计了实际与虚拟控制量。通过自适应方法对系统内各通道间的耦合及不确定项进行估计及补偿,提高了姿态控制的精度。基于PWPF调制方法,将设计的连续控制量解算成可直接用于姿态控制的脉冲控制量,实现了拦截器的数字变推力控制。仿真结果表明,所设计的姿态控制算法在参数摄动及存在不确定干扰的情况下,仍满足姿态稳定跟踪要求。
[Abstract]:Aiming at the steady thrust of the attitude control engine of the solid kinetic energy interceptor, the strong coupling characteristic of the distributed layout control torque and the uncertainty of the system model, the attitude stability tracking control problem of the interceptor is discussed. A novel attitude controller design method based on adaptive robust inversion is proposed. Considering the coupling relationship between the three channels and the thrust of attitude control system, the coupling model of attitude control is established, and the actual and virtual control quantities are designed by means of inversion and sliding mode method. The accuracy of attitude control is improved by self-adaptive method to estimate and compensate the coupling and uncertainty between the channels in the system. Based on the PWPF modulation method, the designed continuous control is calculated as the pulse control which can be directly used in attitude control, and the digital variable thrust control of the interceptor is realized. The simulation results show that the proposed attitude control algorithm still meets the requirements of attitude stability tracking under the condition of parameter perturbation and uncertain disturbance.
【作者单位】：北京理工大学宇航学院;
【基金】：国家高技术研究发展计划资助项目国家“985”工程三期重点建设项目
【分类号】：V448

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