地面颤振模拟试验中加载系统动态特性的影响研究

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摘要地面颤振模拟试验是指利用激振器模拟分布的气动力载荷，在地面获得飞行器结构颤振特性的一种半物理仿真试验技术。以全动舵面缩比模型为研究对象，通过对给定数目的传感器和激振器进行位置优化，获得降阶重构的时域非定常气动力模型；考虑激振器加载系统的动态特性，进行了地面颤振模拟数值仿真，并搭建地面颤振模拟试验系统，完成了半物理仿真试验；在试验中，采用H∞鲁棒控制器解决了多个激振器与结构之间的动力学耦合问题。仿真结果表明，当不考虑激振器加载系统的动态特性时，预测得到的模型颤振边界偏保守；考虑激振器加载系统的动态特性后的时域数值仿真结果和半物理仿真试验得到的颤振边界吻合很好，证实了在地面颤振模拟试验中考虑加载系统动态特性的重要性。

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	张桂玮1
	谭光辉2
	徐钦炜2
	谷迎松1
	杨智春1

关键词 ：气动弹性, 地面颤振模拟, 加载系统动态特性, 气动力降阶, 多激振器力控制

Abstract：Ground flutter simulation test is a semi-physical simulation test technique that obtains the flutter characteristics of the aircraft structure on the ground.Exciters are used to simulate the distributed aerodynamic loads on the structure.In this paper, the scale model of an all-moving fin was studied.The time-domain reduced order model of unsteady aerodynamics was obtained by optimizing the positions of a given number of sensors and shakers.Considering the dynamic characteristics of the exciter loading system, the ground flutter simulation and semi-physical simulation tests were carried out.An H-infinity robust controller was used to decouple the interaction between exciters and structure in semi-physical simulation experiments.The results show that the prediction of flutter boundary is underestimated when ignoring the dynamic characteristics of the exciter loading system.The flutter boundary obtained by the simulation agrees well with the semi-physical simulation test results, when taking the dynamic characteristics of the exciter loading system into account.It is indicated that the characteristics of the loading system should be included in ground flutter simulation.

Key words： aeroelasticity ground flutter simulation characteristics of the loading system reduced order model multi-exciters force control

收稿日期: 2019-01-31 出版日期: 2020-08-15

引用本文:

张桂玮1，谭光辉2，徐钦炜2，谷迎松1，杨智春1. 地面颤振模拟试验中加载系统动态特性的影响研究[J]. 振动与冲击, 2020, 39(16): 214-221.
ZHANG Guiwei1,TAN Guanghui2,XU Qinwei2,GU Yingsong1, YANG Zhichun1. A study on the impact of dynamic characteristics of a loading system in ground flutter simulation. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(16): 214-221.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I16/214

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