基于多项式理论的飞行控制律性能评估

Performance evaluation of flight control law based on polynomial theory

随着设计要求的不断提高,飞行器气动特性愈加复杂,传统的选定特征点再逐点设计控制律并校核的方式越来越难以满足要求。为了解决这个问题,给出了一种基于多项式理论的控制律评估方法。该方法根据线性相关程度对不确定参数区间进行划分,对不同区间内的频率/阻尼比性能进行评估,可以有效评估控制律性能,查找出控制律设计可能存在问题的区域,指出控制律进一步优化的方向。经算例验证结果表明,评估方法合理、可行。

With the continuous improvement of design requirements,the aerodynamic characteristics of aircraft are becoming more complicated.The traditional methods that select feature points and design control law point by point become more difficult to meet the requirements.In order to solve this problem,this paper presents a control law performance evaluation method based on polynomial theory.This method divides the uncertain parameter space according to the degree of linear correlation,and evaluates the frequency and damping ratio in different intervals.This method can effectively evaluate the control law performance,finds out the areas where the control law design may have problems,and indicates the optimization direction.It is considered that this method is feasible by verifying with an example.