Diesel Engine Electronic Governor System Simulation And Fault Diagnosis Of Intelligent Systems

Based on the research project "SPC-33 digital governor computer aided analysis system", this paper realizes the digital governor, which has been fixed in newly built vessels in our country fault analysis and diagnosis with computer and simulates the SPC-33 digital governor control panel and speed control system by adopted the FTA analysis theory and computer based simulation. The technique problems that have been solved are digital governor structure and principle emulating, control panel simulation, fault information stream analysis and SPC-33 digital governor speed control system simulation.In this paper, the author divides the digital governor as speed control unit, drive unit, electronic execution unit. For above three parts, the author also makes principle emulating from structure and function and constructs the hotspot information chain with next class hotspot information chain of specific functions. For the relative units like remote control panel, electronic VIT control, oil eject, speed pick up unit and SPC-33 external interface the hotspot information is also made and displayed by visual components.Including speed control function specification, parameter setting function specification, parameter setting operation, the author build a simulation operation system for SPC-33 digital governor control panel. Through the way of software simulation, the system presents dynamic specification of images and texts and simulates the parameter setting operation. It makes the management personal familiar with digital governor speed control parameters and obtain experience under simulating environment.By adopting FTA (fault tree analysis) and minimal path sets theory, the fault information stream analysis of SPC-33 digital governor is made, and from the point of system the FT is constructed. And the fault model with logic matrix in mirror symmetry has been built. From top level event fault, every level events' ineffective rate and unreliability limit arecalculated and sorted by maximum probability of occurred faults in each level, the sequence of the bottom-event is arranged, and then the most probably happened bottom-event correspond to the specific top-event is found rapidly. Therefore the intelligent fault analysis and diagnose system is realized.After sufficient research and analysis, we make up the logic and math model of digital governor, and establish simulating system of it. On the basis of the model, using unified model languish(UML), we design and develop the simulating system. By adopted object oriented and component based design theory, using dynamic library link technique under windows programming, the system was compacted in structure and run faster.The first edition of the system has been using in COSCON Group, it is welcomed because of the friendly interface, vivid images, directed effect and the ability of problem solving.Huang Aiping (Marine Engineering) Directed by Zheng Shiiun...