飞行控制系统的鲁棒性评估方法研究

Study on Robustness Evaluation Method of Flight Control System

随着现代飞机气动布局的改进和控制方式的多样化,旧有的评价体系已经不能适应新兴的控制系统。针对目前国内外对飞行控制律鲁棒性评估方法的不足,发展了一种基于MonteCarlo方法的评价控制律鲁棒性能的方法。提出了鲁棒度的概念,给出了具体的系统鲁棒性量化指标及计算方法,通过对飞行控制律鲁棒度的比较,进而完成对飞行控制律鲁棒性的评估。它能直观并且定量地得到控制系统在任意给定性能水平下的鲁棒度数值,从而可对不同飞行控制律鲁棒性能的优劣做出比较,得到更为直观的的评价结果。

With the development of the modern aircraft and control method,the traditional assessment approach cannot meet the requirement of new control systems.An improved robustness evaluation approach based on Monte Carlo method is investigated to overcome the shortcoming of the robustness evaluation approach about flight control.A novel concept named robust degree,quantitative index,and algorithm of system robustness is given.The robustness evaluation of flight control systems can be carried out by analyzing the robust degree.The corresponding results demonstrate the effectiveness of the proposed approaches.The value of robustness degree corresponding to any given performance level can be achieved immediately and quantitatively.Therefore,it is easy to obtain direct results of robustness among different flight control laws.