Neal-Smith准则改进分析

Analysis of Neal-Smith criterion improvement

驾驶员在环振荡判定准则较多,其中Neal-Smith准则的应用较为普遍。但Neal-Smith准则并不能准确反映PIO趋势,与驾驶员评估结论也存在一定差异。根据Neal-Smith准则进行飞机纵向驾驶员在环振荡分析的基本方法与程序,结合系统频域响应估算工具,分析得出满足系统性能要求的驾驶员相位补偿和增益区域,并基于该区域面积定义了新的PIO判断准则。与现有Neal-Smith准则相比,新的PIO判断准则可反映一类和二类PIO趋势随闭环系统参数的连续变化情况。

There are many pilot-in-the-loop oscillation criteria,and the Neal-Smith criterion is popular.But Neal-Smith criterion can＇t reflect PIO tendency exactly and the results from Neal-Smith criterion have some differences from PIOR. With the basic approach and procedure of Neal-Smith longitudinal PIO analysis,combined with frequency response estimation tools,a pilot phase compensation and gain region which meet system performance requirements can be obtained. A new PIO criterion is defined based on the region. Compared with Neal-Smith criterion,the new defined PIO criterion can express the continuous change of PIO tendency with the parameters of pilot-in-the-loop system.