Research on application of virtual instrument and grey theory in the fault diagnostic system

Virtual instrument is an integration of the latest PC technology, advanced testing technique and strong software package, and the development of visual instrument system is, in the domain of the automatic test and fault diagnosis equipment, etc, the trend of modern technology. It is developed, applied virtual instrument technology, grey system theory, and database, the fault diagnostic system for shipboard chemical defense equipment, in order to update entirely the means of the equipment testing. The modularization and universalization are proposed in its database-based design concept, realizing the design of software and hardware. The ODBC technique is applied for the interconnection of databases to ensure the generality and flexibility of the system. The system mode the best of virtual instrument platform and grey diagnosis method, broke through conventional check diagnosis patterns for warships chemical defense equipment, solved the problems of state prediction and trouble-mode recognition of warships chemical defense equipment. It has been proved by experiments that the system has merits both high accuracy and economical practicability. Also it can reduce the application development cycle and cost.