Investigation of longitudinal aerodynamic parameters identifcation method for fly-by-wire passenger airliners  

作　　者：Wu Zhao Wang Lixin Xu Zijian Tan Xiangsheng 

机构地区：[1]School of Aeronautic Science and Engineering,Beihang University [2]Flight Test Center,Commercial Aircraft Corporation of China

出　　处：《Chinese Journal of Aeronautics》2013年第5期1156-1163,共8页中国航空学报（英文版）

摘　　要：The flight control system of a fly-by-wire （FBW） passenger airliner with a complex frame-work and high feedback gain augmentation would change the original characteristic of a loaded signal and suppress the excitation of an airplane＇s pertinent motion modes. Taking a research example of an FBW passenger airliner model with longitudinal relaxed-static-stability, a new method of signal type selection and signal parameter design is proposed, through analysis of signal energy distribution and plane body＇s frequency response. According to CCAR60--the Appraisal and Use Regulation of Flight Simulator Device, the simulation validation of the FBW passenger airliner＇s longitudinal aerodynamic parameters identification is put forward. The validation result indicates that the designed signal could excite the longitudinal motion mode of the FBW passenger airliner adequately and the multiparameter comparison in simulation meets the objective test request of CCAR60. Meanwhile, the relative errors of aerodynamic parameters are less than 10%.The flight control system of a fly-by-wire （FBW） passenger airliner with a complex frame-work and high feedback gain augmentation would change the original characteristic of a loaded signal and suppress the excitation of an airplane＇s pertinent motion modes. Taking a research example of an FBW passenger airliner model with longitudinal relaxed-static-stability, a new method of signal type selection and signal parameter design is proposed, through analysis of signal energy distribution and plane body＇s frequency response. According to CCAR60--the Appraisal and Use Regulation of Flight Simulator Device, the simulation validation of the FBW passenger airliner＇s longitudinal aerodynamic parameters identification is put forward. The validation result indicates that the designed signal could excite the longitudinal motion mode of the FBW passenger airliner adequately and the multiparameter comparison in simulation meets the objective test request of CCAR60. Meanwhile, the relative errors of aerodynamic parameters are less than 10%.

关 键 词：CCAR60 Excitation signal design Fly-by-wire passenger air-liner High feedback gain augmentation Identification Longitudinal aerodynamic parameter Simulation validation 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计] V271.1