高超音速飞行器鲁棒控制器设计

Design of Robust Controller for Hypersonic Flight Vehicles

摘要:

军事变革和信息化战场环境的变化,促使空天攻防作战成为未来作战的战场之一;临近空间高超音速飞机和导弹会对传统攻防体系带来颠覆性冲击;复杂环境对高超音速飞行器控制技术的发展提出了严峻的挑战,文章针对吸气式高超音速飞行器在飞行包线内动态特性易变、稳定性较差、不确定因素较多以及对外界扰动敏感以及整个执行机构控制能力弱和动态特性低等的控制问题,首次提出了一种能同时抑制扰动和模型不确定性的基于优化控制的鲁棒控制方法,保证飞行器能得到很好地控制,快速响应环境变化并很快回到稳定飞行的状态;采用线性矩阵不等式方法来设计飞行控制系统,给出了不确定系统稳定的条件, 将反馈稳定问题转化为了一个最优控制问题;同时将闭环极点在一定区域内参与优化,进一步提高优化效率;与文献方法仿真对比结果证实了文章方法的优越性。

Abstract:

The new changes in military innovation and information battlefield make the air-space incorporation battle into one of main future battles. The arriving of Air-breathing Hypersonic Flight Vehicles (AHFV) will give a shock to the traditional offensive and defensive systems. Considering the complex environments, a design of robust and performance oriented control system is the key issue of AHFV. This paper proposes a new methodology, which taking into account the problems of uncertainty and disturbances, to design a robust controller for AHFV. With bounds on the uncertainties, a feedback stabilization problem is converted to an optimal control problem with the demand of pole placement. The contrasts of simulation results indicate that the proposed control law has a good performance and the stability and performance of system can be guaranteed.