Research On Precision Information Model Of Product Based On Uncertainty Theory

With the formation of the global market and the rapid development of the technology of information, communications and material, the trend of manufacturing has changed ultimately. From the development of modern manufacturing system, it is realized that the information of integrated product in product life-circle will play a more and more important role in modern manufacturing. However, the formation of precision information model restricts the development of the information of integrated product. Therefore, to clarify the contents containing in the precision information model and to set up a precision product model, which fits the research, field is the key point. Research on the theories and methods in the precision design of precision product model, which bases on building a precision product model, makes the precision information model getting more and more functional in the manufacturing system.This thesis has thoroughly studied and used the precision modeling theory and method and the key techniques of integrated product information model when researching on the Radar Antenna Structure based on modularized assembly. It has been applied to the research of "The Feasibility Test and Demonstrability of Antenna Structure" ( 040205D2) in the project of The scientific research Unit of China. The main contents are the following:â‘ , Described the finite element analysis and deform test (including stress and displacement) of the Precision Information Model of Antenna Structure;By the comparison with them, the feasibility of Precision Information Model of Product can been proved.â‘¡, Studied on the structure system, Uncertainty Theory of new generation dimensional geometrical product specification and verification (GPS) standard system;Described the influence, style, relation and random distribution rule of geometrical tolerances and dimensional tolerances;and bring in the conception of Computer Aided Tolerancing (CAT) based on precision information model.â‘¢, Aimed at Antenna Structure based on modularized assembly, a precision model of the part is founded at first, which makes use of mathematical representation of planar surface based on variation of DOF and takes size and geometrical tolerance into account. Secondly, the position relations between partsare described by a method based on ordinal virtual assembly and the assembly precision model is established.(Ds Explained the technology of tolerance design;Aimed at Antenna Structure based on modularized assembly, by referring to the random numbers based on Uncertainty Theory that accord with tolerance distribution rule and using Monte Carlo simulation, a simulated analysis and mathematical statistics of the Antenna-Structured Precision Information Model' terminal error have been done. Finally, a precision design soft also has been integrated.