JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2018, Vol. 48 ›› Issue (1): 78-88.doi: 10.6040/j.issn.1672-3961.0.2017.022

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Analysis and design optimization of the performance in flexible lever mechanism for static unbalance measurement system

MIAO Huihua1, LI Peixing1, HU Baizhen2, ZHANG Jiankun2, YAN Weixin1, ZHAO Yanzheng1*   

  1. 1. Research Inst. of Robotics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Shanghai Aerospace Control Technology Institute, Shanghai 201109, China
  • Received:2017-01-13 Online:2018-02-20 Published:2017-01-13

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Abstract: Based on the centroid projection method and flexible mechanism, a set of static unbalance measurement system was designed as well as reducing the flexible lever output flexibility, which could effectively improve the accuracy of measurement by analyzing the measuring principle and components characteristics. The flexible lever flexibility model was established by the circular flexure hinge closed equation, then the finite element analysis software Ansys was used to verify the exactness of the flexibility model. Through reasonable optimization function and constraint conditions, the performance of the input and output in flexible lever mechanism were optimized. The result showed that it was feasible to establish the model flexibility by using the closed-form equation. The error between theoretical value and simulation value was within 9%, and the optimization function was feasible. Under the premise that variation of the lever amplification coefficient was only 2%, leverage output flexibility was reduced by 18.63%. The optimizing result showed that the leverage linearity range was increased to effectively improve the measuring accuracy of static unbalance measurement system.

Key words: closed-form equation, second-order lever, static imbalance measurement, flexible hinge, flexibility model

CLC Number: 

  • TH823
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