基于VB的农业机械液压系统故障诊断专家系统开发

摘要

According to the characteristics of faults in the hydraulic system of agricultural machinery, a VB-based fault diagnosis expert system is designed. The total structure of the expert system is built, and the composing of the knowledge base of that expert system and its inner inference mechanism are emphasized. The expert system makes full use of the database of ACCESS and VB′s visual programming technique characteristics. It gives full play to the VB′s accuracy and efficiency in the process of data , and greatly improves accuracy and efficiency in process of the fault di-agnosis of hydraulic system. It is very valuable to apply this system to the fault diagnosis of hydraulic system in combine harvester.%根据农业机械液压系统故障的特点，设计了一种基于VB的液压系统故障诊断专家系统，并在介绍其总体结构的基础上，着重论述了知识库的构成及内部推理机制。该专家系统利用ACCESS数据库及VB可视化的编程技术特点，充分发挥VB在处理数据时精确、高效的优势，大大提高了专家系统在故障诊断过程中的准确率和效率。该系统运用于联合收割机液压系统故障诊断，取得了良好效果。