Energy-saving and carbon reduction course-keeping control method based on double nonlinear positive feedback
[Objectives]This paper seeks to solve the problem of excessive energy consumption caused by the excessive amplitude of the rudder angle and high frequency of rudder angle change during ship course-keeping.[Methods]A closed-loop gain shaping algorithm(CGSA)is used to design the controller;a double nonlinear feedback algorithm is introduced;the steering amplitude and frequency are reduced by a combina-tion of the bipolar S-function and arc-tangent function;and the whole control system is controlled by the posi-tive feedback method.[Results]The simulation results show that the proposed double nonlinear feedback algorithm improves the comprehensive energy-saving evaluation index of steering gear energy consumption by 31.53%and 18.63%under Beaufort No.6 and Beaufort No.8 respectively.[Conclusions]It is verified that the double nonlinear feedback method has a positive effect on saving the power consumption of the steering gear and reducing carbon emissions in the course of ship navigation,and an equivalent control effect of posi-tive feedback and negative feedback,providing valuable references for the study of ship course-keeping control.
ship engineeringcourse-keeping controlgreen energy-savingdouble nonlinear feedbackpositive feedbackclosed-loop gain shaping algorithm(CGSA)