Research On Mechanical Transmission System Scheme Design CAD Expert System

Transmission system design is important for mechanical system research, it has great effect on the level of production, performs, cost and competitive power of products. Mechanical transmission system is widely adopted in mechanical system. Based on numerical calculate, CAD can automation design, shorten cycle of design, reduce design costs, improve the quality of design, and based on knowledge ,expert system apply experience knowledge and illuminate knowledge of human expert for purpose, provide means to computer to achieve intelligent behavior inference . So ,in this paper , expert system and mechanical CAD are combined , an intelligent Mechanical Transmission System Scheme Design CAD Expert System——MTSSD-CADES is established .The fundamental rules of mechanical transmission system scheme design is analyzed, the develop process and design structure of expert system are studied. Applying Visual Basic, Access and so on software to develop object oriented fuzzy expert system MTSSD-CADES for the fuzzy of design data, design model and decision of mechanical transmission system scheme design. The system is divided into six parts. Knowledge base is established by applying object oriented and so on knowledge express method, Mechanism graph is built by transmission mechanism functional element. Forward direction reasoning expositor is build. Program is edit and data base is build to deal with data and chart involved design. Access data base is established and the way to manage it is studied. The ways of using VB for AutoCAD and Pro/ENGINEER's part parameterize build model re-exploit is discussed. First the mechanism movement diagram of the reasoning scheme is exported, evaluated by a three-level fuzzy synthetically evaluation model to schemes and optimized by no symmetry fuzzy optimization design, the best is found. Applying Pro/ENGINEER fictitious design the best scheme, the three-dimensional mechanical transmission system part model and system's assembly drawing is drawn.By analyzed and test a practical example, it showed that MTSSD-CADES is very effective.