航空学报 > 2010, Vol. 31 Issue (10): 1940-1945

基于回路整型设计的多轴振动控制

姜双燕, 陈怀海, 贺旭东, 游伟倩   

  1. 南京航空航天大学 振动工程研究所 飞行器结构力学与控制教育部重点实验室
  • 收稿日期:2009-11-12 修回日期:2010-03-30 出版日期:2010-10-25 发布日期:2010-10-25
  • 通讯作者: 陈怀海

Multi-axis Vibration Control Research via Loop-shaping Design

Jiang Shuangyan, Chen Huaihai, He Xudong, You Weiqian   

  1. MOE Key Laboratory of Structure Mechanics and Control for Aircraft, Institute of Vibration Engineering Research, Nanjing University of Aeronautics and Astronautics
  • Received:2009-11-12 Revised:2010-03-30 Online:2010-10-25 Published:2010-10-25
  • Contact: Chen Huaihai

摘要: 多激励多轴向振动控制试验中,在频响函数矩阵呈现病态的频率点,控制点响应的自谱和互谱往往难以达到预定参考谱目标。针对这种情况,首先在控制频段对频响函数进行拟合修正,求得系统前置补偿矩阵,然后根据 H回路整型理论对驱动谱矩阵进行整型,将整型后的驱动谱矩阵代替原驱动谱进入控制回路计算。通过试验验证表明,基于回路整型设计的修正算法,能够明显地抑制某些频段内频响函数的不良影响,自谱和互谱响应都能得到比较理想的控制结果。

关键词: 回路整型设计, 多激励多轴向, 振动试验, 振动控制, 多输入多输出

Abstract: In multi-exciter/multi-axis (MEMA) vibration control tests, it is frequently difficult for the auto-spectra of the control point responses to achieve the required reference targets at the frequency points where the frequency response function matrices are ill-conditioned. To cope with this problem, a new method is proposed in this article. The pre-compensator of the plant is obtained by curve fitting and modifying of the frequency response functions in a specified frequency range. The exciting spectrum matrix is then shaped via H loop-shaping theory. The shaped exciting matrix is used in the control loop computation instead of the original one. The experiment shows that the modified algorithm via loop-shaping design is capable of suppressing the adverse effect of the frequency response function at some specific frequencies. The auto-spectra of the control point responses are improved and become satisfactory.

Key words: loop-shaping design, multi-exciter/multi-axis, vibration test, vibration control, multi-input/multi-output

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