有风切变时飞机近地平飞控制参数的优化设计

OPTIMIZATION OF THE CONTROL PARAMETERS FOR AN AIRCRAFT IN LEVEL FLIGHT THROUGH LOW-ALTITUDE WIND SHEAR

本文主要讨论有风切变时飞机近地平飞控制参数的优化设计问题。列出了有风切变时飞机的纵向运动方程及其线化形式,以此为出发点探讨了基于无限时域二次型佳能指标的最优控制问题及其逆问题.分别采用给定增益矩阵P求权矩阵Q和给定Q阵求P阵的两种方法来求解Riccati矩阵代数方程。以Y-8飞机作为算例进行了计算,从而得出最优控制规律。并且对两种算法进行了比较和分析,提供了具有一定参考价值的优化结果.

In this paper, the optimal problem of the control parameters for th aircraft in level flight through low-altitude wind shear is discussed. Based on the linearized equations of longitudinal motion, containing the wind shear terms, the optimal control problem with infinite time quadratic performance index as well as the reversal problem are investigated. Two approaches are taken for solving the Riccati algebraic equation.As an example of calculation the optimal control law for the transport airplane Y-8 is obtained. In the meantime, the two approaches are analized and compared with each other. Some useful results are presented.