Research On Fault Diagnosis Expert System For Fan Based On Rough Sets

As the common equipment in many industries,especially in sintering plant,the fan is of great importance to the factory's safety running,so the status inspecting and fault diagnosis by various ways is valuable.This paper discuss the possibilities and ways of fault diagnosis system of fan,and the intelligent tecnnology such as expert system is applied.The primary coverage as follows:Firstly,analyzes the need ,research status and development and task of fault diagnosis theory and technique.As fan is subject investigated, introduces the present status ,the source and main cause of fault diagnosis of fan,also introduces vibration analysis of fan simply. Presents starting link and system organization of fan's inspects status and fault diagnosis. The system collects data through data acquisition system, inspects fan's status with monitoring soft,establishes routine and fault data bases, and calls routine analysis daughter system,and in the end diagnoses the fault,observates equipment's operating mode; finds fault type and cause.With the assistance of the diagnosis system,the economy and safety of factory is greatly improved.Secondly, this paper discuss basic conception and general structure of expert system mainly, analyzes merits and faults of some algorithm deeply, on the basis of that,presents a fan fault diagnosis expert system based on rough sets theory by field reality.With the relation of fan's symptom and fault,structures symptom-fault parallel table which is simple and clear.Reduces knowledge base by rough sets, establishes inference rules through forward inference,overcomes the"bottle neck"problem of knowledge acquisition of expert system by combining fuzzy theory with rough sets.Last, develops a software of fan fault diagnosis expert system with Borland C++ Builder,supplies key frame of system,tests the operation result of system through a specific example,verifies this system's practicability and accuracy.Still further,applies rough sets in expert system to diagnose fault has great potentiality and good prospect,also through object-orientated language develops fault diagnosis expert system of fan.The system's practicability is strong and the interface is friendly,can be generalized into the fault diagnosis of fan kind rotary machines, and the diagnosis system will be of great significance in engineering.