舰船螺旋桨推进轴系多维耦合振动自适应控制

Adaptive control of multi-dimensional coupled vibration of ship propeller propulsion shaft system

推进轴系振动会造成其位移,由此影响舰船螺旋桨推进轴系的稳定性和可靠性,本文针对此问题,提出舰船螺旋桨推进轴系多维耦合振动自适应控制方法。取基座振动为观测点,采用前馈式控制方法控制轴系纵向维度振动;设计并联电磁执行器,抑制螺旋桨区域将受到周频力、叶频力以及频力叠加造成的周期性扰动力影响所形成的横向维度振动;将纵向维度振动与横向维度振动控制参数作为模糊PID控制算法的输入,控制器会根据这些输入以及预设的控制规则,自动调整其控制参数,以达到对多维耦合振动的最佳控制效果。实验结果显示,该方法纵向振动抑制水平达到15 dB以上,月内位移降低7 mm,说明该方法可提高推进轴系工作过程的稳定性和可靠性。

The vibration of the propulsion shaft system can cause displacement,which affects the stability and reliability of the ship propeller propulsion shaft system.To address this issue,a multi-dimensional coupled vibration adaptive control method for the ship propeller propulsion shaft system is proposed.Taking the base vibration as the observation point,a feedforward control method is used to control the longitudinal vibration of the shaft system.Design parallel electromagnetic actuators to suppress lateral vibrations in the propeller area caused by cyclic forces,blade frequency forces,and periodic disturbances caused by frequency force superposition.The longitudinal and transverse vibration control parameters are used as inputs for the fuzzy PID control algorithm.The controller will automatically adjust its control parameters based on these inputs and preset control rules to achieve the best control effect on multi-dimensional coupled vibration.The experimental results show that the longitudinal vibration suppression level of this method reaches over 15 dB,and the monthly displacement is reduced by 7 mm,indicating that this method can improve the stability and reliability of the propulsion shaft system working process.