民用飞机控制律对偏航机动载荷影响分析  

The Influence of Control Law on Yaw Maneuver Load about Civil Aircraft

作　　者：阮文斌 张智[1] RUAN Wenbin;ZHANG Zhi(Aircraft Structure and Stress Division,COMAC Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]中国商飞上海飞机设计研究院飞机结构强度工程技术所,上海201210

出　　处：《航空工程进展》2020年第6期900-906,共7页Advances in Aeronautical Science and Engineering

摘　　要：飞机机动过程中方向舵快速大幅偏转会使方向舵和垂尾上产生较大气动载荷并传递到后机身,导致驾驶员来回往复蹬舵造成安全事故。针对CCAR-25部25.351条规定的偏航机动情况及CS-25部25.353规定的偏航机动新条款——方向舵往复偏转,本文首先对两种偏航机动条款分别进行分析;然后考虑控制律进行偏航机动情况机动仿真计算;最后通过比较分析飞机响应运动参数及垂尾载荷计算结果,并分析控制律对偏航机动载荷的影响。结果表明:对于偏航机动,考虑控制律后飞机的响应幅度有所缓减,导致垂尾载荷有所降低;对于偏航机动新条款,由于方向舵反向偏转导致侧滑角贡献和方向舵偏度贡献垂尾载荷两者叠加,从而导致垂尾载荷大幅增加;P-Beta控制律有效降低了方向舵往复偏转的垂尾载荷。The fast and sharp deflection of rudder in aircraft maneuvering process can produce large aerodynamic loading on rudder and vertical fin,and transmit them to the rear fuselage,even cause the safety accident of reciprocated rudder pedalling of pilot.Based on yaw maneuver situation stipulated in article 25.351 of CCAR-25 and rudder control reversal situation stipulated in article 25.353 of CS-25,the CCAR25.331 and CS25.353 are firstly analyzed;then the maneuver simulation calculation for two yaw maneuver situations with/without the consideration of control law respectively is carried out;and finally a comparative analysis of the aircraft response and the vertical-tail load is conducted,and the influence of control law on yaw maneuvering load is analyzed.The results show that,for the yaw maneuver situation,the response amplitude of the aircraft is reduced after considering the control law,and the vertical-tail load is reduced;after considering the rudder control reversal,the response amplitude of the aircraft and the angle of side slip are increased,and the vertical-tail load is finally increased;the vertical-tail load caused by the rudder control reversal can effectively be reduced after considering the P-Beta control law.

关 键 词：偏航机动 方向舵往复偏转 控制律 垂尾载荷 机动仿真 

分 类 号：V215.1[航空宇航科学与技术—航空宇航推进理论与工程]