柔性铰链, 变截面, 等效刚度, 微位移放大机构

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The equivalent stiffness k of a variable cross section flexure hinge was researched.The paper presented two methods about calculating the equivalent stiffness k.One was named as the correcting coefficient method, the other was named as variable cross section method. Though examples, the results of the two methods are quiet close to each other and the variable cross section method is simpler and genericer than that of correcting coefficient method. The variable cross section method was used to calculate the equivalent stiffness k of the flexure hinge in compliant micro-displacement amplification mechanism,the compliant mechanism was analysed and the input displacement, output displacement and the amplification ratio were calculated under different forces.The results are contrasted with that of the finite element simulation, the similar results are obtained,which indicates the validity of the variable cross section method.