闭环气动参数辨识的两步方法

Closed loop identification of aerodynamic parameter using two-step method

对于闭环控制飞行器动力学系统,如果输入输出数据中含有误差和噪声,将其直接用于辨识气动参数是有偏差的。针对这个问题,利用闭环控制飞行仿真数据,采用两步方法辨识飞行器的气动参数,并与直接开环辨识的结果及参数真值进行对比,表明两步方法辨识结果较直接开环辨识方法具有更高的精度,是一种有效的闭环气动参数辨识方法。

For dynamic system of aircraft in closed loop control, the results will be partially inaccurate if in-out data with errors and noises is used for identifying the aerodynamic parameters. In this thesis, the two-step method of aerodynamic parameter identification for aircraft in the closed loop control is developed. The aerodynamic parameters are estimated for simulation example of aircraft in the closed loop control, and the results are compared with parameter＇ s true values and the results of identification by open loop method, it is shown that the closed loop aerodynamic parameter identification method is validated.