Abstract: A double mass vibrating system of self-synchronization with tri-exciter was put forward. The dynamic differential equation of the double mass vibrating system was established and the electromechanical coupling mathematical model was got. The new electromechanical coupling simulation model was built. By the method of controlling variables, the effects of various factors, such as stiffness of middle spring, resonance, centrifugal force and motor mounting position on self-synchronization of the system and phase difference were studied in a numerical experiment manner. The research results show this system can achieve a stably synchronized motion under certain conditions. The stiffness of intermediate spring, exciting force and installation position of motors have a significant impact on the performance of the system synchronization. System synchronization can’t be obtained when the resonance happens. Increasing horizontal mounting distance of motors of upper body benefits system synchronization.

Key words: double mass vibrating system, electromechanical coupling, controlling variables, self- synchronization