测量参数时间延迟对气动导数辨识结果的影响

THE EFFECTS OF TIME DELAY IN MEASURED PARAMETERS ON AERODYNAMIC DERIVATIVE IDENTIFICATION

主要讨论了测量参数间的时间延迟对飞机气动导数辨识结果的影响。通过对飞机仿真数据的计算表明,为了保证气动导数辨识的准确性,必须对测量参数间的延迟时间作一定的限制。结果表明,飞机的主要导数对时间延迟不敏感,而一些小值导数则较敏感。文中还根据实际计算经验对测量参数间的延迟时间给出了适当的限制。这些结果可为工程应用提供理论参考。

This paper briefly discusses the effects on the aerodynamic derivative identification results caused by time delay in measured parameters. The results, show that the time delay in measured parameters must be limited in a rang so as to estimate the derivative accurately. This paper also shows that the main derivative of aeroplane are not sensetive to the time delay, but some little derivatives are. The limits of the time delay are also given in this paper based on our experience of derivative identifications, The results here cart be used as a reference to the aerodynamic identification calculating.