美军标1797飞行品质规范分析

利用1797品质规范检验现役某第三代战斗机飞行品质过程中，在确定瞬时峰值比、上升时间时，认为通过利用高阶系统传递函数求出的时间响应特性得出的结果更合理；提出了一种利用优化技术确定尼尔一史密斯准则的方法，取得了满意的效果；通过把计算与所反映的飞机实际飞行品质进行比较，发现该规范对短周期飞行品质的某些要求过严，应用时需做某些具体指导和调整。

Study to Ey Quality Criteria of Mil - 1797 - STD

When checking a third fighter aircraft which is in service with the standard of 1797, it is thought that it is more reasonable to get time domain indices such as ratio of peak values uprising time etc. with time response curve obtaining through transferring function of high order system. A method to determine neal- smith criteria with optimization technique is put forward in this paper and the method works very well. By comparing the results calculated out with the actual flying qualities of an aircraft, it shows that some of criteria in 1797 on the short period flying quality of an aircraft are too strict to be met, so when they are applied to evaluating the flying qualities of an aircraft, a reasonable adjustment should be done according to the actual application and some guidelines should be given in detail, in this way, some un -compatible results can be explained very well.