电传飞机横向Ⅱ类PIO趋势预测技术应用研究  

Study of the application of fly-by-wire aircraft lateral typeⅡPIO tendency predicting technology

作　　者：刘瑜[1] LIU Yu(General Flight Test Technology Institute,CFTE,Xi’an 710089,China)

机构地区：[1]中国飞行试验研究院总体所,陕西西安710089

出　　处：《飞行力学》2020年第4期71-75,共5页Flight Dynamics

摘　　要：针对电传飞机横向Ⅱ类PIO对着陆阶段飞行安全的致命影响,通过分析副翼舵面速率限制成因及产生的效应,结合电传飞控闭环系统稳定性原理,对提出的由速率饱和引发的Ⅱ类PIO趋势时域预测方法进行型号工程应用探索。通过对应用实践中典型电传飞机的着陆试飞数据进行分析和评估,给出了试飞结论和设计改进建议。应用结果表明,该方法分析结果正确、合理,与飞机实际响应一致,能够用于预测由副翼速率饱和引发的横向Ⅱ类PIO趋势。将该方法的应用从理论分析拓展到工程实践,对保障电传飞机试飞安全和优化设计具有一定的指导作用。In light of the fly-by-wire aircraft lateral typeⅡPIO’s fatal influence on flight safety in landing phase,combining with the stability principles of the fly-by-wire flight control closed-loop system,exploration of model engineering applications on a proposed time-domain predicting method for rate saturating induced typeⅡPIO tendency was carried out.By analyzing the origin and effect of the aileron rate limiting,engineering practice through the analysis and evaluation of the fight testing data in the phase of landing,the flight test conclusions and improvement suggestions for design are proposed.The results show that the analysis results of this predicting method are proper,which are consistent with aircraft’s real response.The method can be used to predict the aileron rate saturating induced horizontal PIO tendency and provide guidance how to support the safety of flight test and optimize the design of fly-by-wire aircraft.

关 键 词：电传飞机 预测方法 Ⅱ类PIO 工程实践 

分 类 号：V217[航空宇航科学与技术—航空宇航推进理论与工程]