Design And Research Of A 2-DOF Micro-motion Stage Based On Lever Amplifying Amplitying Mechanism

With the continuous development of science and technology, humans have gradually widened the research field which has changed from the macroscopical world to the microcosmic micro and nano world and made many significant breakthroughs especially the biomedical research field. The appearance of micro operation robot meant a lot to the biomedical research field and caused rapid development of biomedical research. In recent years, the development direction of science and technology is miniaturization and precision. Micro operation robot has largely changed the lifestyle of humans and convinced people in their life and now a variety of micro operation robots have been designed and produced.This paper makes a research on a 2-DOF micro-motion stage based on lever amplifying mechanism. The parallel mechanism is used in the stage, it can be realized in two directions x and y movement. Flexible hinge is chosen in place of conventional hinge. Because of the small deformation displacement, we choose a two lever amplification mechanism to amplify the output displacement.PZT actuator is selected as the driver. This is the structure of the stage designed in this paper. In the paper, we first make a brief introduction of micro operation robot, then make a description of the research purpose, research significance and the research background at home and abroad, then analyze the performance and principles of the flexible hinge, PZT actuator and lever amplification mechanism. By comparing and making analyses of the alternative structures, the reason of our choices is given. In the next step, we make static analysis of the stage and get the input and output flexibility of the stage, then use PSO to optimize the parameter in order to get the optimal size of the stage. To have greater inherent frequency is the target of the optimization method. At last, we use finite element simulation to analyze the stage and we get the figure of displacement, stress and the first modals of the stage.At the end of this paper, we make a simple summarize of the work we have done and look forward to next work, make detailed analyses of the shortcomings and hope that we can make further breakthroughs in future work.