双振动台随机振动H_∞双自由度综合控制研究  

Dual-shaker random vibration test control with two-degree-of-freedom H_∞ controller

作　　者：游伟倩[1] 崔旭利[1] 陈怀海[1] 贺旭东[1] 

机构地区：[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,南京210016

出　　处：《振动与冲击》2011年第5期179-183,204,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(10972104);江苏省研究生科研创新计划(CX07B-062z)

摘　　要：在不考虑互谱的情况下,提出了一种双振动台随机振动控制试验的H∞双自由度控制新方法。研究了基于Η∞控制理论的双振动台解耦控制方法,应用Η∞双自由度控制方法进行双振动台随机振动控制。用一悬臂梁模型进行数值仿真验证,仿真结果表明在20 Hz^2 000 Hz频率范围内,利用Η∞双自由度控制方法设计的控制器,能使输出控制谱和参考谱的自谱密度误差控制在±1 dB以内,完全符合双振动台设计的控制要求。同时试验结果表明该方法可实现综合控制的所有要求,各项控制精度均满足实际工程要求。A new approach was presented for dual-shaker random vibration test using H∞-based optimal decoupling method with two-degree-of-freedom controller,without taking cross-spectra into account.A cantilever beam was used to verify the proposed control approach.A two-input two-output control model was set up based on the beam.The simulation results demonstrated that,in frequency range of 20 Hz to 2000 Hz,the controller can make the error between the output PSD（power spectral density） and the reference PSD be less than ±1dB,which is perfect for the dual-shaker random vibration control test.Finally,a test was performed and the test results showed that the proposed method can meet the engineering demands.

关 键 词：Η∞控制 振动控制 随机振动 双振动台 振动环境试验 

分 类 号：O324[理学—一般力学与力学基础]