GAP准则在驾驶员诱发振荡预测中的应用

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。

Application of GAP Criterion in Prediction of Pilot Induced Oscillations

Along with flight control of electric drive high plus widely apply to advanced large-scale aerotransport and advanced battleplan,flight safety problem caused by pilot induced oscillations,the GAP criterion was applied to predict pilot induced oscillations,the sinusoidal input/triangle output describing function model of rate limiting was built and the Neal-Smith pilot model was improved.The describing function method is proposed to investigate the mechanism of PIO.The calculation method of GAP criterion is attained.Finally,the PIO sensitivity of a type of fighter is predicted by GAP criterion and the results are verified by simulation.The results prove that GAP criterion has specific physical significance and illustrative results,calculate efficiently,and can predict the occurrence of PIO accurately.The important theoretical references can be provided for designing flight control systems.