The knowledge of the loader diagnosis system mainly comes from the analysis and research of the structure and function of the maintenance loader, the analysis of the fault mechanism and the extraction of the fault characteristics. For different maintenance personnel, different recognition and diagnosis steps are often formed according to their previous diagnosis experience. Therefore, the empirical knowledge of loader fault diagnosis has the following characteristics: The knowledge of carrier fault diagnosis is after long-term maintenance practice by maintenance experts Summary of experience, knowledge has a strong coupling relationship, can not form a good system. Due to the lack of essential knowledge of this kind of knowledge, it is difficult for even experts to express it clearly in many cases. Empirical knowledge is often described in natural language and cannot be accurately quantified and effectively calculated. The acquisition of information parameters is tested by means Part of the information needs to be obtained through human sensory organs (called failure phenomenon), so it is very subjective, and different people may make different judgments. Changes in operating conditions lead to changes in symptoms , So that the diagnostic knowledge has certain dynamic characteristics, and the symptoms of multiple hidden faults cross and interfere with each other, showing multiple characteristics.
