【作者】 秦僮； 刘磊； 王博； 樊慧津；

【Author】 Tong Qin;Lei Liu;Bo Wang;Huijin Fan;Huazhong University of Science and Technology;

【机构】 华中科技大学；

【摘要】 针对弹性运载火箭刚体状态与弹性模态在时间尺度上的较大差异,本文采用奇异摄动理论对弹性运载火箭系统进行时标分解,将原系统转换为刚体慢变子系统以及弹性快变子系统,然后分别进行控制器设计。针对传统复合控制策略的次优性,本文采用了一种新的矫正复合控制思想得到整个系统的控制律。仿真结果表明,将奇异摄动思想运用在弹性运载火箭控制上是可行的,同时采用的矫正复合控制相比传统复合控制使得弹性模态峰值更小,收敛更快。更多还原

【Abstract】 In view of the large difference in time scale between the rigid body state and the elastic mode of the elastic launch vehicle, in this paper, we convert the original system into a rigid body slowly changing subsystem and an elastic fast changing subsystem by time-scale decomposition using the singular perturbation theory, and the controllers are designed respectively. Aiming at the suboptimality of the conventional composite control strategy, we adopt a new corrected composite control idea to obtain the control law of the whole system. The simulation results show that it is feasible to apply the singular perturbation idea to the elastic launch vehicle control, and at the same time, the corrected composite control adopted here makes the elastic mode peak smaller and the convergence faster than the conventional composite control.更多还原