Self-tuning PID Control For Diesel Generator On Marine Power Stations And Its Virtual Simulation

Marine power stations play extremely roles in ships. The ship's economic, technological performances and its security are directly regulated by the continuity, reliability and quality of the power supply from the marine power station. On the other hand, automation of marine power station has been forcefully stimulated by the outstanding progress of the microcomputer technology which has found wide uses in the areas of automation since 1970's. As a result, better quality is required for the managers of marine power systems and the corresponding experimental facilities are needed to supply training functions. In this dissertation, a PC-based marine power station simulator taking the form of software is developed. In such a system, all equipments in the marine power station, including diesel generator and its control panel, are simulated via computer-aided software like LabVIEW and Matlab. The operator can artificially run the power station through keyboard and mouse for the training courses. Based on this simulator, some advanced control techniques for marine power station have been investigated.As the basis of the further research and development, at first the mathematical models of the marine power station are analyzed, involving the diesel, electrical machine and excitation system, with the simulation models on Matlab being built up. Then the self-tuning PID control for the marine diesel generator is studied, and the internal model control (IMC) technique is introduced for the first time to achieve better control, with the control performances being compared with the other control methods. At last, a virtual simulation system for the marine power station is established by using LabVIEW and Matlab. The key solutions to the major problems of this project are proposed in this dissertation.As the research involved in this dissertation is just a part of a complicated project, it is still far from perfect. However, it provides new ways to solve the critical problems in the virtual simulation and control of the marine power station in the light of the following aspects.1.The concept of virtual reality is introduced into marine power station simulation, which is proved to be feasible.2. The virtual simulation of marine diesel generator, together with its control panel and sound/flash alarming is realized via propercomputer-aided tools.3. The IMC-based self-tuning PID control is investigated and applied to control the marine diesel generator. Better robustness and stability are obtained.4. Several kinds of software tools, such as LabVIEW, Matlab and Microsoft Access are integrated in this project, with the problems on the communication, control and synchronization among them being resolved.Furthermore, the state-of-the-art and the trends of marine -power station are summarized and reviewed in this dissertation, indicating the expansive development of the software simulator. The problems which need to be solved for further research are also discussed from the viewpoint of virtual reality. The applications of the intelligent control in the marine power station are briefly surveyed.Ren Wei (Control Theory and Engineering) Directed by Associate Prof. Xu ShanLin and Prof. Ye YinZhong...