Behavior of linear compliant mechanism using numerical and experimental method

Abstract

In today's fast-moving and competitive world, the engineering applications are evaluated based on the precise and accurate results. The intense need for precision motion is achieved with the help of deflection of beams in compliant mechanism. A special class of mechanism is referred to as compliant mechanisms that are based on the rigidity and mobility of a component, which lead to greater precision without affecting its accuracy. Major failures of compliant mechanism are due to in plane and out of plane movement of compliant beams for the repetitive use. Life of compliant mechanism needs to improve for large deflection values. Motion is created by molecular deformation with bending of beams in elastic zone. Compliant mechanism are used in modern techniques such as micro-nano processing microscopy, biomedical scanner are existing mechanisms for precision scanning. Available biomedical scanner is using ball screw mechanism to achieve X directional and Y Directional scanning range. Ball screw mechanism provides 0.5 mm displacement in single stroke which takes so much times to stabilize the image. Compliant mechanism provides displacement of 0.1 mm in step. Biomedical scanner required X and Y Direction scanning range of 6 mm which we can achieve by using compliant mechanism. In present paper Experimental and Numerical analysis of compliant mechanism is done for linear motion which is used in biomedical scanner. Static structural analysis on Compliant mechanism is performed to get linear displacement values with steel, Titanium alloy and Aluminium alloy. Modal analysis of Compliant mechanism is performed to get natural frequency of system with steel, Titanium alloy and Aluminium alloy for better stability of mechanism we can operate Compliant system below that resonance frequency. By using Compliant mechanism we will get smooth range of motion over ball screw mechanism.