| With the development of science and technology and the demand of sustainable development, countries and governments devote themselves to exploit new regenerative clean energy and the corresponding energy converter. But by now, the diesel engines are still playing an important role in industry applications thanks to their typical superiority. Especially in the shipbuilding area, a large proportion of ships have one or more diesel engines. By using the modern design, manufacture and control approach, the characteristics of diesel engine have been enhanced a lot. It has been more and more automotive and intelligent. The Digital Speed Regulator (DSR) is an excellent application example of high-tech implemented in the diesel engine.More and more modern diesel engines employ the DSRs instead of the conventional mechanical or mechanical/hydraulic speed regulators, which have low control precision because of the oversimplified control strategy along with fraction and inertia of the devices. The DSR is much more accuracy than the conventional speed regulator, and also can help the engine running more automotive. On the other hand, the disadvantage of the DSR is result from the complexity of its high-integrated hardware and software. It's perhaps a real challenge for the marine operator to have a thorough grasp of it. To overcome this shortcoming, a virtual training environment is developed in this paper aimed to help the marine operator mastering the skill in using, managing and maintenance of the DSR equipment.DGS8800e, a digital speed regulator produced by NorControl (a firm) is studied in this paper. After studying its control strategy and working process, a detailed dynamic simulation model is constructed. Based on this model, a friendly GUI is developed for virtual training purpose. The details are as follows:Firstly, a dynamic simulation model of the DGS8800e is studied and established emphatically. This model is focused on the DGS8800e itself, and the object controlled is also concerned. Considering the real-time characteristics and model's reusability, a modularization design approach is employed here, by which a whole simulation model is constructed hierarchically. Then, the model is implemented by commercialsoftware Matlab/Simulink. By this model, the physical prototype converts to numerical prototype, which can be run in the virtual simulation environment. It is the kernel part of the whole virtual simulation system.Secondly, a virtual manipulation panel is developed by Visual C++ version 6.0, a powerful GUI tool. This virtual panel perhaps can be considered as a duplicate of the real DGS8800e operation panel. It has the same functionalities and operation instructions as the real one. Furthermore, the human being's activities are also introduced into the virtual system, including operating, using and maintenance of the DGS devices. This is the main target of the marine engine room simulation system. The trainer can have a good and effective exercitation by the virtual system.Finally, the dynamic simulation model and the virtual manipulation panel are integrated, and form a sophisticated DGS8800e virtual simulation software system. This software is now applied to the New Tsingdao marine simulation system successfully.A virtual simulation software system for DGS8800e is developed coupling using Matlab/Simulink and Visual C++ successfully in this paper. Here, the two different commercial codes are coupled and reinforced each other perfectly. The methods, system framework and implement experience introduced in this paper can be used for reference by the other similar system development. |
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