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Study On A New Generation Of Virtual Instrument System Based On Intelligent Virtual Control

Posted on:2004-11-24Degree:DoctorType:Dissertation
Country:ChinaCandidate:B P TangFull Text:PDF
GTID:1118360095456598Subject:Mechanical and electrical engineering
Abstract/Summary:PDF Full Text Request
It was pointed out clearly that the developing direction of measurement and test instruments was 'Virtual' and 'Control' in the summary of proseminar on "fifteen" priority supported domain in mechanism subject, which was held by National Nature Science Fund Committee in Guangzhou city in December, 1999. Therefore, the new generation of virtual instrument (VI) system based on intelligent virtual control (IVC) was put forward under the background. The main aspects of the research are the procreant thought of the new IVC-based-VI system, system's software architecture, IVC-based-VI mathematical modeling, key component of system and null-programming developing system.New concept of design and manufacture instrument based on Qin's IVC was put forward. Qin's model is the procreant thought of IVC-based-VI, and It is new pattern of instrument. The creationary thought is: Non-IVC can be turned into intelligent instrument unit with the function of actual measurement instruments by the function endowing and test fusing, and these units can be used as basic building blocks for a variety of more complex virtual measurement instruments on a PC computer. Three important concept of Qin's model are function endowing, test fusing and assembling as building blocks, and they are the basis of theory and technology for designing developing system. The principle of Qin's model, model element of IVC, forming principle of IVC based on function endowing and test fusing, and forming principle of IVC-based-VI system based on frame agreement developing system are introduced. The characteristic of Qin's IVC is that it fuses the function modules and the controls modules so that the relationship between the functions and controls of an instrument is imbedded in one or more units. The implementation of Qin's IVC evolves instrument from whole to part, and change radically the mode of design and manufacture instrument.IVC-based-VI system's software architectural pattern based on hierarchical message bus (HMB) is designed. The HMB pattern describes IVC and IVC-based-VI system with uniform mode, and it consists of external interfaces, static structure, dynamic behavior and hierarchical message bus. The HMB pattern supports dynamic evolution of system on running time, namely the function of system can be modified, appended and deleted. For example, It can append and delete IVC, message response register, and change rule of message filter. The HMB based software architectural is blueprint of implementation for IVC-based-VI system, and affords integration and assembling of IVC with stability technology basis.The modular mathematical modeling method of IVC-based-VI is studied. By studying the principle, function, performance, precision indicator, working condition, the mathematical modeling of VI's representative common components is discussed in detail through modular modeling method. The modular model of representativecommon components includes signal transform uniform mathematical model, Three-dimensions data field mathematical model and virtual display screen mathematical model. Using noise octave analyzer and order analyzer for rotating machine as example, the application of modular modeling method is introduced. The modular modeling method promotes IVC-based-VI from technology research to theory research, and affords design and manufacture of IVC-based-VI with theory basis.The design and manufacture of reusable IVC have been done. FVC is the key component of the IVC-based-VI system, and the kinds and amounts of VI assembled by the instrument assemblage site of the developing system depend on how many reusable controls in the IVC base. Optimizing design method of control is discussed through discussing the cohesion, coupling and reuse of control. The object oriented expression of non-IVC is introduced, and the electronical classification files of non-IVC is edited. The hiberarchy and expression of FVC are also been set up, and the design and manufacture of reusable FVC based HMB is realized. The repeating design is avoided during...
Keywords/Search Tags:Intelligent virtual control (IVC), IVC-based-VI, Hierarchical message bus (HMB), Mathematical model, Null-programming developing system
PDF Full Text Request
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