Study Of Variable Universe Fuzzy PID Speed Control For Marine Diesel Engine

As the rapid development of computer technology, bus technology, control technology, and network technology, computer has been largely applied in cabin automation systems, especially in the exchange of information, real-time control, and control algorithm areas. With rapid development of Chinese shipbuilding industry, the framework which is based on field bus and configuration software has already been applied in navigation. This system can replace the engineer to act as patrol manager, monitor, and controller.The mathematical model of marine diesel as well as speed control algorithms have been thoroughly researched in this paper. With the combination of PID control and fuzzy logic control, the variable universe fuzzy PID controller has been proposed. Besides, a semi-physical simulation platform as well as a monitoring and control system have also been built, which has already been realized in the simulation system.At first, the average model of marine diesel has been built in MATLAB/SIMULINK. And then, according to such model, some studies on the control algorithms have been conducted. A variable universe fuzzy controller has been designed according to the short points of conventional PID controller as well as the fuzzy logic controller. This variable universe fuzzy PID can not only self-regulate the parameters but also ameliorate the control performances. Comparing with the simulation results of conventional PID control, this variable universe fuzzy PID control has a large improvement in overshot as well as response time. At last, the MATLAB/RTW real-time system has been built in Advantech IPC, which is applied to replace the real marine diesel system. And the whole semi-physical simulation platform is composed of this RTW system, DSP controller, ANYCAN nodes, as well as the whole Internet-CAN network. In the host computer, iFIX configuration software is adopted to design the whole monitor and control interface.The research of this paper is considered as the basis for the test of practical cabin system. And more important, a comparative new algorithm for marine diesel speed control is proposed. This research for marine diesel speed controller would no doubt provide theoretical as well as technological support for the later studies, which can shorten the development cycle, and play a positive role for the diesel electronic control technology.