高超声速飞行器强鲁棒自适应控制器设计新方法

Novel Design Method of Strength Robustness Adaptive Controller for Hypersonic Vehicle

针对高超声速飞行器飞行过程系统参数大范围剧烈变化以及存在严重不确定性的特点,同时考虑外界环境干扰复杂,内部干扰严重的特殊问题,提出了一种新型强鲁棒自适应控制器构型。该新型强鲁棒自适应控制器将控制器分为标称控制器和补偿控制器。标称控制器可采用成熟的控制理论来设计,主要考虑闭环系统的性能;采用合适的手段估计系统参数大范围剧烈变化、系统的不确定性以及内、外部干扰等"系统扰动"作为补偿控制器的输入,通过设计强鲁棒补偿控制器对"系统扰动"进行补偿,使整个闭环控制系统对"系统扰动"具有强鲁棒性。将新型强鲁棒自适应控制器应用于高超声速飞行器的姿态控制系统的设计,大大提高了高超声速飞行器控制系统对内、外部干扰的抑制和对系统参数大范围剧烈变化以及严重不确定性的适应能力,可满足高超声速飞行器飞行控制的需求。

For special problems of hypersonic vehicle flight including the dramatic change of system parameters and severe system uncertainty, taking complex external environmental disturbance and serious internal interference into account, this paper proposes a novel strength robustness adaptive controller. This new controller is divided into nominal controller and compensate controller. The nominal controller is designed by sophisticated control theory taking the performance of closed - loop system as a major consideration. The estimation of the dramatic system parameters change and system uncertainty as well as system disturbance are used as the input signal of compensate controller. Strong robust compensation controller is designed to compensate system disturbance, which strengthens the entire closed -loop control system robustness. Through designing strong robustness attitude controller of hypersonic vehicle based on this method, the capacity of resisting interfer- ence and the adaptability to dramatic change of system parameters and uncertainty during hypersonic vehicle flight can be promoted, which meets the requirements of hypersonic vehicle control system.