Case-Based Knowledge Acquisition of Agricultural Machinery Product Digitized Design

摘要

Compared with traditional design methods which based on experience, modern products design of agricultural machinery is market-oriented, function-driven and knowledge-based. Focusing on its bottleneck, namely, the acquisition of knowledge, case-based reasoning and case-based design, the application of CBR is introduced. The case instances encapsulate the design requirements (including the performance specification, environment constraints, cost limitation), design tasks, design processes, and design solutions, providing the comprehensive information for implementing a modern design system with capabilities of function-driven and agile response to market needs. The case-based reasoning cycle is discussed in detail, especially the step of case representation and case retrieve. Moreover, a case representation model of design cases and fuzzy similar precedable ratio, one flexible case retrieving model, facing with farm pump, which widely used in farming production, water consumption of human and herd, drought and flood fighting is adopted. The work presented lays a usable foundation of case-based design, gives support to functional retrieval in concurrent design environment, and promotes the automated conceptual design of modern products.