多输入多输出冲击振动试验研究  

Input Signal Identification in MultipleInput and Multiple-Output Shock Vibration Test

作　　者：徐浩[1] 陈怀海[1] 游伟倩[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《振动．测试与诊断》2010年第2期143-148,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:10672078);航空支撑科技基金资助项目(编号:05D52009);江苏省普通高校研究生科研创新计划资助项目(编号:CX07B-062z)

摘　　要：基于多输入多输出线性系统控制理论,提出了通过时频转换求取多个振动台输入的方法,并用MATLAB对算法进行了数值仿真。在悬臂梁上进行双振动台冲击振动模拟试验,用LabVIEW编写控制软件驱动PXI总线仪器实现输入信号的发生及响应信号的采集、分析与处理。试验结果表明,被控两点的输出加速度信号满足了预定要求,从而验证了本文方法在工程应用中的有效性。Based on the multiple-input and multiple-output(MIMO) linear system theory,a time-frequency transform method was put forward to calculate the input data of a vibration generator system,and its algorithm was simulated by using MATLAB.A shock vibration test with two exciters was conducted on a cantilever beam,and the control software driving the PXI bus was programmed in LabVIEW in order to generate the input signals and sample the response signals.The results show that the multipleoutput signals can be controlled in the tolerance range of the reference signals.The method is proved to be feasible in engineering practice.

关 键 词：多输入多输出 冲击振动 时频转换 波形复现 振动环境试验 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程] O329[理学—一般力学与力学基础]