Large Deformation Analysis for Flexure Hinged Displacement Amplifier based on Minimum Potential Energy

摘要

This paper presents a method for large deformation analysis for flexure hinged displacement amplifier by minimum potential energy. The flexure hinged displacement amplifier is widely used in micro electromechanical system, micro manipulation, gyroscopes. Different from conventional hinge, monolithic flexure hinge has the advantages of no friction, no wear, no backlash. With the great development, flexure hinge is not just applied in the elastic stage. But the nonlinear analysis of large deformation restricts the application of flexure hinge. This paper presents a method for large deformation analysis for flexure hinged displacement. The difference between small deformation and large deformation is discussed. And then a bridge-type displacement amplifier is designed and its performance is studied by MPE. The results by MPE and FEA is compared.