Jixie chuandong (Jan 2018)
Statics Analysis of a New Type of Probe with Parallel Compliant Constraint
Abstract
The probe is the key component of the precision measurement equipment,and the development of the new type of probe is the focus of the field of precision measurement technology. The existing research mainly focuses on improving the measurement theory and optimizing the sensor performance,and has little research on the structural innovation of the probe body. Based on the basic property of the mechanism that the parallel mechanism is located in the singular configuration,a new kind of parallel compliant probe is constructed by using the method of rigid body replacement. The line geometry and the null space method of the force Jacobian matrix are used to explain the function freedom of mechanism required for the 3D probe. Based on the statics of the parallel compliant support mechanism and the stiffness model of the branched chain,the overall stiffness matrix of the mechanism and the force-displacement model of the probe are established. Besides,the correctness of theoretical analysis is verified by numerical simulation and finite element software. The research content expands the application scope of the parallel compliant mechanism,enriches the structural innovation method of the precision probe constraint support mechanism,and lays an important theoretical foundation for further constructing the new probe based on the type of parallel compliant mechanism.
