Abstract: Topology and location and size of actuation element integrated optimization method of compliant mechanism system with output coupling terms control is presented. Firstly, a multi-criteria optimization model with output coupling terms suppression and electromechanical coupling effect in the system caused by the actuator and mechanism is developed. The compliance and stiffness of the system can be adjusted according to the working condition. Secondly, the computational procedure of the topology and the actuation element optimization algorithm is also developed. Finally, numerical examples are presented to show the validity of the presented method.

Key words: Compliant mechanism, Coupling terms, Piezoelectric actuation, Topology optimization, Arc bubble, Mechanical constraint, Microstructure, Welding stability, Underwater wet welding