基于QFT的直升机全包线姿态控制器设计

摘要

针对飞行包线上对象数学模型的大范围变化所带来的系统不确定问题,提出基于定量反馈理论(quantitative feedback theory,QFT)的直升机全包线姿态控制器设计方案,讨论了运用QFT设计多输入多输出(multiple-input multiple-output,MIMO)系统控制器的原理及一般设计过程,并采用该理论设计UH-60直升机在6种飞行状态下的全包线姿态控制器.结果证明:QFT能够解决由于模型参数不确定性所造成的控制系统鲁棒性问题,而且具有较强的工程应用价值.%Helicopter full envelop attitude controller based on quantitative feedback theory (QFT) is proposed in this paper for solving the problem of system uncertainties due to the wide rage variations of mathematical models of helicopter in the flight envelop. This paper firstly gives a review and discussion of the principles and basic design procedure of QFT for multiple-input multiple-output (MIMO) system, and then applies QFT for the full envelop attitude control of UH-60 with 6 different flight statuses. The research results show that QFT method can successfully resolve the robust problem of flight control system in the presence of model parameter uncertainties, and also show that this method has good engineering applicability.