Sharif Digital Repository

Increasing and diversified use of micro electromechanical components necessitates further development of methods for their secure gripping and transfer. In this research, a piezoelectrically driven microgripper including two gripping sets with four arms has been designed. The system can hold and handle microparts from 100 to 150 microns by applying corresponding voltages between 80 to 20 volts. The design is such that after positioning the work piece between the two microgripper arms the piezoelectric comb-drive actuators are activated. Then the two gripping arms are moved toward each other and ultimately grasp the work piece. In order to determine the behavior of the... 

Herein, an introduction to optimization, aiming to help knowledge development in design optimization techniques is given. Besides, a new method of using the theory of topology optimization to optimize a microgripper system, with a piezoelectric ceramic driver (PZT) microactuator is presented as well. An optimization method is also presented to generate better control conditions. In this study a micro object gripper of 9200 µm length, 8100 µm width, and 500 µm thickness is optimized, and performances improvement is analyzed. This thesis is to investigate best practice and give advice on how to understand the process of topology optimization and how to setup an optimization run. At first, an...