Study on Dynamic Modeling and Vibration Noise Suppression Method of AUV

This paper focuses on the key technical problems of the autonomous underwater vehicle (AUV) vibration and noise reduction. The dynamic model of AUV with propeller-shaft-motor by the second Lagrange method is established. The nonlinear bearing and other connecting parts are fully considered, which is solved by Runge-Kutta method, the dynamic behavior mechanism of AUV is revealed. Taking the vibration amplitude of the shell as the cost function and according to the amplitude-frequency response characteristics of the system, the resonance changer (RC) device by parameter design is designed. The results show that the resonance response amplitude can be greatly reduced. The theoretical model of this paper reveals the dynamic response characteristics of AUV. The results can provide new improvement ideas for the optimization design of vibration and noise reduction of AUV, and have theoretical guiding significance.