Object-oriented implementation of expert systems for engine lubricating oil inspection

Inspection of the engine lubricating oil can give an indication of the internal condition of an engine. By means of object-oriented programming (OOP), an expert system is developed in this paper to computerize the inspection. The traditional components of an expert system, such as the knowledge base, the inference engine, and the user interface are reconstructed and integrated, based on the Microsoft Foundation Class (MFC) library. To verify the expert system, an inspection example is given at the end of this paper. (AIAA)