Linearity of the Force Leverage Mechanism Based on Flexure Hinges

This paper proposes development of a force leverage mechanism based on the flexure hinges. The primary function of this leverage mechanism is to transform an objective unbalance force/moment to a force sensor in the static unbalance measure system. The measure precision is dependent on the linearity of the force transmission of the force leverage mechanism. The kinematics of the force leverage mechanism is modeled based on the elastic model. The finite element method is used to verify the analytical solutions. Moreover, the effect of the initial external load on the linearity is investigated. Further, the virtual experiment is carried on to verify the linearity and sensitivity. The static unbalance measure system employing the proposed leverage mechanism has the advanced sensitivity of less than 0.03 gcm and performs excellent linearity.

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