研究了Gap准则，建立了速率限制舵机的描述函数模型、改进的Neal-Smith模型，介绍了描述函数法研究I类驾驶员诱发振荡（PIO）的机理，得到了Gap准则在预测纵向I类PIO中的计算方法。并应用Gap准则对飞机纵向I类PIO进行了预测，结果表明Gap准则能够有效的预测纵向I类PIO。%In this paper the gap criterion was researched, the description function of rate-limiting actuator was built up, and the Neal-Smith pilot model was perfected. The method of using description function for predicting II PIO was presented. And the whole process to predict the longitudinal II PIO was given. The result showed it was effective.
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