Topology Optimization Realization of a Spatially Parallel Compliant Mechanism With Constant Motion Transmission Characteristics

This paper presents a new topology optimization method of spatial compliant parallel mechanism. The constant motion transmission characteristic matrix of a special parallel mechanism is analyzed. Combining the matrix with topology optimization, a new multi-objective topology optimization formula of multiple input and output compliant mechanism is proposed. The strategy is capable of optimizing the compliant mechanism free of considering the replacement of rigid hinges by flexible ones, so as to obtain a compliant mechanism with higher motion accuracy and there is a linear mapping relationship between input and output. Through several numerical examples, it is verified that the compliant mechanism obtained by this method is isomorphic with the original parallel mechanism in kinematics.