Parameterized Analysis of Aeroservoelastic Stability for Closed-Loop Aircraft  

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作  者:Jihang Lyu Fei Yang Rong Yang 

机构地区:[1]Beijing ZhongHangZhi Technology Co.,Ltd.,Beijing 100176,China [2]Shanghai Aircraft Design and Research Institute,Shanghai 201210,China [3]AVIC General Huanan Aircraft Industry Co.Ltd.Zhuhai 519040,China

出  处:《Journal of Beijing Institute of Technology》2024年第5期450-464,共15页北京理工大学学报(英文版)

摘  要:The closed-loop flight control system of fly by wire is generally adopted in modern air-craft.Based on the frequency-domain stability analysis,the aeroservoelastic model of closedloop aircraft is established,and aeroservoelastic stability parameterized calculation of design improvement is conducted after the preliminary analysis.The design variables are mounted location of integrated sensors and damping coefficientsζ_(1),ζ_(2) of notch filter,with stability margin of the system as design objective.Results indicate that aeroservoelastic margin of the aircraft in certain states is insufficient.While the mounted location of integrated sensors is adjusted,the system stability can be improved to certain extent.It’s more appropriate to mount the integrated sensors in the overlapping field between the nodal lines of vertical and lateral bending for the fuselage.The system stability is also significantly improved by adding notch filter,both gain margin and phase margin increase when the real number pairζ_(1)-ζ_(2) is located in the zone above the 45°diagonal ofζ_(1),ζ_(2) con-struction plane,and the farther theζ_(1)-ζ_(2) is from the 45°diagonal,the stronger the system stability.Also the decrease in the gain peak of frequency response and the enhancement of relative stability of the system are achieved by the appropriateζ_(1)-ζ_(2) of notch filter.

关 键 词:aeroservoelasticity mounted location of sensors notch filter stability margin response peak 

分 类 号:V249.1[航空宇航科学与技术—飞行器设计]

 

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