| In recent years, micro-positioning technology has been getting more attentions with the development of technology. This technology has been widely used in the field of precision machinery manufacturing, processing, assembly, micro-electromechanical systems (MEMS), precision optics, biomedical engineering.. These areas requirements more and more high-precision positioning system.. They not only requires that the system has good movement characteristics, high-precision positioning accuracy but also the system has a fast response time. Therefore, to research one complaint parallel mechanism which use in precision positioning platform system has broad application prospects and development potential.The transmission mechanism and control system for precision positioning platform has been researched in this paper. The precision positioning platform system drives by piezoelectric ceramic,3-RPC complaint parallel mechanism use as a transmission mechanism for precision positioning platform. This platform system uses conventional PID control method combined the micro displacement detection device as its control system.This paper analysis3-RPC parallel mechanism configuration and motion characteristics based on parallel mechanism screw theory. Combined with the characteristics of flexible hinge to design3-RPC complaint parallel mechanism. Compared to traditional branched structure, the complaint branched which designs in piece can eliminates assembly errors in the transmission gap, and mechanical friction, improve institutional positioning accuracy.Compliant parallel mechanism static stiffness model is established by the virtual work principle. Using Solidwoks estibilished complaint parallel mechanism model. To obtained mechanism simulation output displacement simulate Structure statics using ANSYS. The results provide a comparative basis for the experimental design. Combined with simulation, structure static stiffness model derivates structure static stiffness matrix.Precision positioning platform control system uses conventional PID control. The paper analyses the working principle of the piezoelectric ceramic actuator and its hysteresis, creep, nonlinear characteristics based on the design of the hardware system. Precision positioning platform control system model is established and designs platform PID controller. The model is simulated by MATLAB.Precision positioning platform experiment system is built to make experimental verification. The piezoelectric ceramic positioning accuracy and platform positioning accuracy are detected. The positioning system error sources and reasoning are analysed. The measurement results verify rationality of the precision positioning system design analysis.
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