旋转质量矩弹头双环滑模变结构姿态控制

为解决质量矩弹头的复杂非线性控制问题,把质量块运动引起的转动惯量的变化和惯性力矩作为参数不确定性因素,考虑了气动力矩参数的变化,提出了基于时间尺度分离的两环变结构姿态控制,设计了含有跟踪误差及其积分函数的滑动超平面,基于李雅普洛夫函数证明了能达阶段的收敛性,分析了闭环系统的稳定性.仿真结果表明,该控制策略具有很好的快速性、稳定性,对上述3种不确定性具有一定的鲁棒性.

Variable Structure Control for the Attitude of Moving Mass Rotating Missile

To solve the complicated nonlinear control equations of moving mass rotating misile, the variation of rotation inertia caused by mass movement and inertial moment were taken as uncertainty. Aerodynamic moment was also considered. Two-loop variable-structure attitude control strategy was presented. The sliding hyperplane containing tracking error and integral function was designed. Based on the Lyapunov function, convergence at the reaching phase was proved. The stability of closed-loop system was analyzed. The result shows that the control strategy is of speediness and stability, and it is of robustness to the above three kinds of uncertainty.