本文着重研究了因近场感应电压相位差引起的耦合误差，以及近场天线差斜率变化引起的定向灵敏度的变化；
This paper mainly studies the coupling error caused by induction voltage phase difference, and fluctuation of directional sensitivity caused by changes in near-field difference slope.
引入柔度差值斜率的概念确定结构可能出现损伤单元的位置，采用基于二阶特征灵敏度的方法确定可能损伤单元的损伤程度。
The slope of flexibility difference was introduced to locate possible damage elements, and the damage extent was estimated using the second order eigen-sensitivity approximation method.
结果表明，飞行品质对操纵导数及惯矩的变化最灵敏，对升力线斜率变化呈一定的灵敏度，而对其它参数变化则不太灵敏；
The results show that the flying qualities are most sensitive to variations of the longitudinal control effectiveness and the moment of inertia besides a little to variation of the lift curve slope.
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