In this study, the load fluctuation of the main engine is considered to be a disturbance for the jacket coolant temperature control system of the low-speed two-stroke main diesel engine on the ships. A nonlinear PID temperature control system with satisfactory disturbance rejection performance was designed by rapidly transmitting the load change value to the controller for following the reference set value. The feed-forwarded load fluctuation is considered the set points of the dual loop control system to be changed. Real-coded genetic algorithms were used as an optimization tool to tune the gains for the nonlinear PID controller. ITAE was used as an evaluation function for optimization. For the evaluation function, the engine jacket coolant outlet temperature was considered. As a result of simulating the proposed cascade nonlinear PID control system, it was confirmed that the disturbance caused by the load fluctuation was eliminated with satisfactory performance and that the changed set value was followed.

• 이유수(윈터투어 가스앤디젤 코리아 엔지니어) | Yu-Soo LEE (Technical Expert, Global Customer Operation Experts, Winterthur Gas & Diesel Korea)
• 황순규(대우조선해양 에너지시스템 연구개발부 책임연구원) | Soon-Kyu HWANG (Principal Researcher, Energy System R&D Department, DSME)
• 안종갑(경상국립대학교 실습선 운영관리센터 교수) | Jong-Kap AHN (Professor, Training Ship Operation Center, Gyeongsang National University) Corresponding Author