摘要
针对弹性飞行器综合鲁棒控制性能受模型降阶误差影响的问题,提出了一种双回路鲁棒控制设计方法。首先利用次优控制方法设计内反馈回路,有效降低了降阶后模型的误差界;然后采用混合灵敏度H∞鲁棒控制方法设计外回路,保证了系统的鲁棒稳定性和性能。仿真结果表明,双回路方法并没有增加控制器阶次,但在满足系统鲁棒稳定性要求的前提下较大地提升了控制器性能,其控制性能明显优于单回路鲁棒控制器。同时这种控制器能够有效降低控制系统与动力学系统间的不利耦合,延缓伺服颤振的发生,是一种非常适用于弹性飞行器的控制方法。
A design method of double-loop robust control for elastic aerocraft is devised in this paper.First,the suboptimal control is used for inner-loop designing to reduce the error boundary of a reduced model.Then the mixed sensitivity H∞control is introduced for out-loop designing to ensure robust stability and capability of the system.The result of simulation shows that the double-loop design method improves the control performance effectively without increasing the orders,and is better than single-loop robust controller clearly.At the same time this controller can restrain the servo-flutter effectively with good dynamic characters,and it is a kind of advanced controller designing method for elastic aerocraft.
出处
《飞行力学》
CSCD
北大核心
2011年第6期68-71,共4页
Flight Dynamics
