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驾驶员诱发振荡问题的分析,一般通过模拟试验或飞行试验进行。但为了设计计算的需要,本文参考有关资料,提出两种理论分析方法,即频率法和根轨迹法。 文中首先给出飞机的纵向运动方程、助力及非助力操纵系统方程以及有关传递函数,然后根据飞机与操纵系统组合的闭环动力学模型,计算舵偏角对杆力输入的频率反应或绘制根轨迹曲线,从而可以分析飞机的诱发振荡趋势。 此外,还介绍了几种纵向驾驶员诱发振荡的简化判据。并对主要影响因素,特别是对操纵系统配重的影响进行了讨论。
Driver-induced oscillation analysis, usually through a simulation test or flight test. However, in order to design and calculate the need, this paper refers to the relevant data, proposed two theoretical analysis methods, namely the frequency method and root locus method. In this paper, the longitudinal motion equations, the assisting and non-boosting control equations and the transfer functions are given first. Then the frequency response of the steering angle to the input of the rod force or the root locus is calculated according to the closed-loop dynamics model of the combination of the aircraft and the control system Curve, which can analyze the induced vibration of the aircraft trend. In addition, several simplified criteria for driver induced oscillation are introduced. The main influencing factors, especially the influence on the weight of the control system are discussed.