Temperature Control of a Regasification System for LNG-fuelled Marine Engines Using Nonlinear Control Techniques

• Published in: International journal of control, automation, and systems Vol. 16; no. 6; pp. 3047 - 3054
• Main Authors: So, Gun-Baek, Yi, Hyun-Sik, Son, Yung-Deug, Jin, Gang-Gyoo
• Format: Journal Article
• Language: English
• Published: Bucheon / Seoul Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers 01.12.2018; Springer Nature B.V; 제어·로봇·시스템학회
• Subjects: Automation; Circle criterion; Computer simulation; Control; Controllers; Engineering; Engines; Fuzzy control; Gases; Genetic algorithms; Heat exchangers; Liquefied natural gas; Marine engines; Marine propulsion; Mechatronics; Nonlinear control; Proportional integral derivative; Regular Papers; Robotics; Temperature control; 제어계측공학; nonlinear PID controller; T-S fuzzy model; Circle criterion; temperature control
• ISSN: 1598-6446; 2005-4092
• DOI: 10.1007/s12555-018-0179-6

This paper presents two nonlinear PID (NPID) controllers which control the glycol temperature of a regasification system for LNG-fuelled engines. The NPID controllers have a parallel structure of the three nonlinear P, I, D actions or the linear P, D actions and nonlinear I action. A nonlinear function is employed to scale the error as input of the integral and implemented as a Takagi-Sugeno (T-S) fuzzy model. The controller parameters are optimally tuned by using a genetic algorithm. Furthermore, the stability problem of the overall system is verified based on the circle criterion. A set of simulation works is carried out to validate the efficiency of the two proposed controllers.