参数变化对人－机系统特性的影响，是机器设计者和操作者共同关心的问题．研究系统参数的灵敏度，对于现实人－机关系的良好匹配，具有指导意义．本文以驾驶员－飞机构成人－机系统．根据闭环频域准则，推导出闭环特性对驾驶员模型参数和飞机模型参数的灵敏度公式．算例表明了导出的灵敏度公式编程方便、计算准确、省时．计算结果对人－机系统的分析与综合具有良好的实用性．

Both of the designer and controller of a machine are interested in the fact that parameter changing affects the man-machine system characteristics. It is significiant to study the sensitivities of the system parameters for realizing good match between man and machine. In this papre, based on the Neal-Smith criterion of the closed loop system, the sensitivities formula are developed for the parameters of the pilot and aircraft. As an example, the sensitivities of an pilot-aircraft system are calculated and analysed from the formula. The example shows that the formula are very convenient for programing and calculating. The accurate results of the sensitivities can be obtained from these formula. The calculated results are practical for analysing and synthesizing the man-machine system.