Finite Element and Experimental Validation of Stiffness Analysis of Precision Feedback Spring and Flexure Tube of Jet Pipe Electrohydraulic Servovalve

摘要

Electrohydraulic servovalve has a major part to play in feedback control system. The feedback spring and flexure tube elements are identified as more critical spring elements in servovalve operation. If these elements are properly designed with respect to stiffness, automatically dynamic performance of the servovalve is improved. Hence an attempt has been made to predict the stiffness of these elements by finite element method. The solid model of these components are carried out in IDEAS-Master module and simulated with appropriate boundary conditions. Also an experimental prototype model is designed and fabricated to test these precise components. The obtained results are validated with FEM results. The FEM gives complete behavior of these components. Results related to stress concentration areas due to loading are also included in the paper.