摘要
针对在跨声速风洞试验过程中试验模型出现的低频大幅振动现象,研制了一套基于压电陶瓷作动器的主动振动控制系统并设计了一种多模态PD控制算法,在数值仿真计算、地面试验和风洞试验中均取得了较好的控制效果。主动控制算法以抑制振幅最大的俯仰方向振动为目标,利用傅里叶级数对俯仰方向振动数据进行模态分解得到前两阶主振动模态,利用递推最小二乘法对单模态进行通道传递函数参数辨识,针对单模态通道传递函数设计控制算法。结果表明所采用的算法能够对被控对象实现较好的控制。将所设计的控制算法加载到主动振动抑制系统,通过地面调试验证和风洞试验,最终表明研制的减振系统能够实现对风洞模型振动的有效抑制,振动衰减可以达到80%以上,风洞试验时长增加了50 s左右,增大试验攻角5°。研究具有工程实用价值,并且为后续开展多自由度控制、多执行机构协同控制、智能控制算法研究提供有力支撑。
Considering the phenomenon of low frequency and large amplitude vibration of the test model in the process of transonic wind tunnel test,a multi-mode PD control algorithm was designed and good control effect was achieved in numerical simulation,ground test and wind tunnel test.The algorithm was designed to suppress the pitch direction vibration with the largest amplitude,the first two main vibration modes were obtained by modal decomposition of the pitching direction vibration data using Fourier series,the recursive least square method was used to identify the parameters of the channel transfer function of the single mode,the control algorithm was designed for the single-mode channel transfer function.The adopted theoretical methods and algorithm design ideas were discussed,and the methods adopted by numerical simulation were verified.The results showed that the algorithm can achieve better control of the controlled object.The designed control algorithm was loaded into the active vibration suppression system.Through ground debugging verification and wind tunnel test,it was finally shown that the developed damping system can effectively suppress the vibration of the wind tunnel model,and the vibration attenuation can reach more than 80%.The wind tunnel test duration increased by about 50 s,and the measured value of the test angle of attack balance increased to 5°.Thanks to its engineering practical value,this research can provide strong support for the follow-up research of multi-freedom control,multiactuator collaborative control,and intelligent control algorithm.
作者
寇西平
李斌斌
杨智春
曾开春
杨兴华
KOU Xiping;LI Binbin;YANG Zhichun;ZENG Kaichun;YANG Xinghua(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;High Speed Aerodynamics Institute,China Aerodynamic Research and Development Center,Mianyang Sichuan 621000,China)
出处
《航空动力学报》
北大核心
2025年第5期350-359,共10页
Journal of Aerospace Power
关键词
PD控制
风洞试验
主动振动控制
传递函数
系统建模
参数辨识
PD control
wind tunnel test
active vibration control
transfer function
system modeling
parameter identification
