Research on Sensor Placement Optimization Method in Environmental Vibration Test
LI Qi-zhi[1] [2],CHEN Guo-ping[1] WANG Kai[3]
1.Institute of Vibration Engineering Research,Nanjing University of Aronaustics and Astrounautics,Nanjing 211006, P.R.China; 2. Nanjng of Electronics Technology, Nanjing 210039, China;3. Military Representative Office of PLA in the fourteenth Research Institute, 210039, China
Abstract：In order to obtain the optimal acceleration sensor location, on the basis of electric vibration multipoint control principle and the characteristics of fixture transfer function, the sensor placement optimization calculation model was established. A fixture was taken for example to establish the finite element model and NASTRAN software was used to get the transfer function, then an optimal sensor location was obtained according to the optimization model previously mentioned. Finally, the response of connection site between fixture and test sample was measured by fixture vibration test. The test results indicated that the mean square deviation of response coming from optimization method was significantly smaller than that coming from the traditional method. It was proved that the optimization method is practical and feasible, and the optimization method can provide theory and practice guidance for sensor placement and vibration fixture design in environmental vibration test.
2013, Vol. 32 
