For problems of too long testing time,the difficulty to determine the number of sensors,and the difficulty to determine measurement points in vibration modal tests of a dicing saw,a method to combine the effective independent method,QR decomposition method,the mode assurance criterion (MAC) and Shannon expansion method was proposed to optimize measuring points for the main system of a dicing saw.The hammering modal test method was adopted to measure modes of a certain type of dicing saw before and after optimizing measurement points.Meanwhile,the vibration modes and modal parameters for the main system of the dicing saw were identified.The modal parameters before and after measuring points optimization were compared.The results showed that the modal tests after test points optimization can realize the target as close as possible to the real information using limited sensors arranged on key measure points,the test time is shortened,and the accuracy of tests is improved.The results provided a reference for the vibration modal testing of complex equipments.
Key words
dicing saws /
vibration mode /
measurement points optimization /
mode assurance criterion
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] Ma Y. Research on performance of diamond blade in dicing saw based on ANSYS method [J], Journal of Advanced Manufacturing Systems, 2012,11(2): 25-33.
[2] 张喜清，项昌乐，刘辉等．基于预试验分析的复杂箱体结构试验模态研究[J]．振动与冲击，2011,30（04）：109-112+14．
Zhang Xi- qing，Xiang Chang- le，Liu Hui，etc. Modal testing study on a complicated housing structure based on pre- test analysis[J], Journal of Vibration and Shock,2011,30(04): 109-112+14．
[3] 白向贺. 数控机床模态实验的激励点选择和响应测点布置优化[D],武汉：华中科技大学, 2012.
Bai Xiang-he. Nc machine tool modal experiment of point selection and arrangement of measure points in response optimization [D], Wu Han: Huazhong University of Science and Technology, 2012.
[4] 刘伟，高维成，李惠，等．基于有效独立的改进传感器优化布置方法研究[J]．振动与冲击，2013,32（06）：54-62．
Liu Wei,Gao Wei-cheng,Li Hui,etc.Improved optimal sensor placement methods based on effective independence[J]. Journal of Vibration and Shock,2013,32(06):54-62.
[5] Xiaohe Xu, Youfa Yang, Shuai Li, etc. A Modified Optimal Sensor Placement Method Based on the Effective Independence Method[J]. Journal of Information & Computational Science, 2015,12(11): 4457-4464.
[6] Kammer D C. Effects of noise on sensor placement for on-orbit modal identification of large space structures[J]. Journal of dynamic systems, measurement, and control, 1992, 15(2):341-352.
[7] Bai X H, Mao X Y, Li B. Optimal sensor placement for CNC Machine tools[J], Advanced Materials Research, 2012,479-481:1813-1821.
[8] Stubbs N.Park S. Optimal sensor placement for mode shapes via Shannon's sampling theorem. Computer-Aided Civil and Infrastructure Engineering, 1996, 11(06): 411-419.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(1512 KB)
