Coupling analysis of torsional vibration and engine rotational speed control system of marine propulsion shafting

摘要

For general simulation of engine rotational speed control system, the shafting is always assumed to be rigid. The torsional vibration characteristics of the shafting are neglected. The possible relationship between the rotational speed oscillation phenomenon and coupling of the torsional vibration and the engine rotational speed control system will not then be revealed in such simulation. In this paper, by assuming the shafting to be elastic instead of rigid, a coupling simulation model is established. The influences of different PID control parameters and variation of the propeller damping to the speed-control performance are analysed to illustrate the coupling characteristics of the shafting torsional vibration.