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随着高增益、全权限电传飞行控制系统在大型运输机和先进战斗机上的广泛应用,非线性驾驶员诱发震荡现象不断增加,已造成多起事故,严重影响飞行安全,运用GAP准则对驾驶员诱发振荡现象预测。需要建立舵机速率限制正弦输入/三角输出描述函数模型和尼尔-史密斯驾驶员模型,运用描述函数法研究P IO的产生机理,介绍GAP准则的一般计算方法,最后运用GAP准则对某型飞机展开研究并进行仿真验证。结果表明:GAP准则物理计算高效、结果直观、意义明晰,可以有效预测P IO的发生。研究结果能为飞机飞行控制系统的设计提供重要的理论依据。
With the wide application of high gain and full-flight fly-by-wire flight control system on large transport aircraft and advanced fighter jets, the non-linear driver-induced oscillation phenomenon has been increasing. Many accidents have been caused and the flight safety has been seriously affected. Induced oscillation phenomenon prediction. Need to establish the servo speed limit sinusoidal input / triangular output description function model and the Neil Smith driver model, the use of descriptive function method to study the mechanism of P IO, GAP guidelines introduced the general calculation method, and finally the use of GAP guidelines for a certain type of aircraft Study and simulation. The results show that the GAP criterion is highly efficient in physical calculation, intuitive in result and clear in meaning, which can effectively predict the occurrence of P IO. The results can provide important theoretical basis for the design of aircraft flight control system.