Research on dynamics of sorting arms with high frequency reciprocating motion

Journal of Vibroengineering

Wei Jiang¹  Xinyong Mao²  Songping He²  Xuchu Jiang²  Bin Li² 

[1] School of Information and Security Engineering, Zhongnan University of Economics and Law,Wuhan, Hubei, China;School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China;

关键词: high-frequency reciprocation;    strain modal analysis;    EMA;    OMA;   

DOI  :  10.21595/jve.2018.18892

来源: DOAJ

【 摘 要 】

The characters of high frequency reciprocating equipment are quick starting and stopping, short range, high frequency and multi-freedom reciprocating motion. The inertia introduced by the high frequency reciprocating motion of a LED chip sorter has complicated effects on the positional accuracy. It is necessary to obtain dynamics of the sorting arm to suppress the vibration of the high frequency operation. The positioning precision and positioning time are affected by the natural vibration of the sorting arm by analyzing the displacement response. The paper verifies that the inherent vibration of the sorting arm has a crucial effect on its positioning precision and positioning time. Under static condition, due to the additional mass of the accelerometers, the research results show that there is no obvious difference in the experimental modal analysis (EMA) based on multi-type sensors. The modal parameters identified by accelerometers and strain gauges are very close. The modal parameters are obtained through the modal analysis method, which combines the strain modal analysis and operational modal analysis (OMA), under high frequency reciprocating motion. The paper verifies that the modal parameters of lightweight structure are very different in the static and operation. The key points of each mode are found by analyzing the modal amplitudes at different speeds which provide the guiding principle and basis for the dynamic optimization of the sorting arm mechanism.

【 授权许可】

Unknown