Optimization Design of Flexible Micro-Displacement Amplification Mechanism Based on Parameters

To optimize the flexible micro-displacement amplification mechanism, it is necessary to design the flexure hinge parametrically.Anew general structural parameter ε was proposed, the effect law of ε to the compliance coefficients of different types of flexure hinges was discussed, and the compliance features of the commonly used flexure hinges were compared horizontally. Conversely, based on the influence analysis of the compliance features, a new parameter λ, the compliance ratio, was proposed, and the main form of sensitivity in the output displacement of the flexure hinges with different λ was analyzed. An actual flexible micro-displacement amplification mechanism with two stage levers was taken as an example, which achieved the type selection by making use of the parameters ε and λ, and the amplification ratio of the flexible mechanism was also validated by FEM simulation and experiment. Under the same driven force (10N), the amplification ratio k before and after optimization based on the parameters of ε and λ are 6.72 and 8.96, respectively; while the experiment results are 6.28 and 8.88, respectively. The simulation and experiment results show that the working range of flexible amplification mechanism could be enhanced effectively based on flexure hinges with the parameters ε and λ. It is feasible and correct to design the flexible amplification mechanism parametrically by the structure parameters of the flexure hinges, and it is helpful to optimize this type of flexible amplification mechanism.

並列關鍵字

Flexure Hinge ； Flexible Amplification Mechanism ； Structure Parameter ； Compliance Ratio ； Parametric Design

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