Dual multi-objective optimization design method for compliant guide mechanism

In this paper, a dual multi-objective optimization design method for compliant mechanism is proposed, and a new compliant guide mechanism is designed by using this method. The method combines the local optimization of multi-objective optimization algorithm and the structural optimization of multi-objective topology analysis, which can carry out the optimization design more systematically and comprehensively. Firstly, we present the specific optimization workflow and construct the mechanism amplification ratio model and pseudo-rigid body model. Secondly, the single design is carried out through using a combination of sensitivity analysis and NSGA-II multi-objective optimization, and meanwhile the EMM + TOPSIS are utilized to ensure the objectivity of the result ordering. On this basis, double design is then conducted and a better comprehensive working performance could be obtained by applying multi-objective topology design. Finally, a prototype is fabricated for experimental testing. The results show that the amplification ratio error between simulation and experiment is just 2.16%, and the operating frequency reaches 1762.9 Hz. The experimental results prove the correctness of the simulation results and show the practical application of the optimization method.