大气层外拦截器开关式姿态控制律设计

以大气层外拦截器为背景,为了提高姿态控制系统对干扰力矩的鲁棒性,基于预测控制方法设计了开关式姿态控制律.将导引头视场约束和姿态角速度约束以输出约束的形式添加到预测控制的优化问题中,保证了目标不脱离视场.针对线性化后的姿态运动模型,采用约束"紧缩"的方法,通过适当的调整约束集,保证了算法的鲁棒性.在此基础上得到了带有开关输入的姿态控制对应的优化问题.仿真结果表明,本文给出的设计方法即使在存在较大干扰力矩的情况下仍然能够满足姿态控制精度要求.

Design of on-off attitude control law based on model predictive control

For exo-atmospheric interceptor, in order to improve robust of attitude control system to disturbance moment, the on-off attitude control law is designed based on predictive control. The constraint on field of view and angular velocity form of output constraint is added to optimization problem of predictive control, the target leaving field of view is avoided. For the linearization attitude control model, the robust of algorithm is guaranteed by applying constraint tightening. Based on this, the optimization problem corresponding to attitude control with on-off inputs is obtained. Simulation results show that the proposed method meets accuracy requirements even if large disturbance moment.