Patent ReferencesDiagnostic apparatus Expert system for surveillance, diagnosis and prognosis of plant operation Plant fault diagnosis system Automatic plant state diagnosis system including a display selection system for selecting displays responsive to the diagnosis Methods and apparatus for performing system fault diagnosis Automated system to prioritize repair of plant equipment System for prognosis and diagnostics of failure and wearout monitoring and for prediction of life expectancy of helicopter gearboxes and other rotating equipment Fuzzy logic ladder diagram program for a machine or process controller Process facility monitor using fuzzy logic Combining estimates using fuzzy sets Patent #: 5357449 InventorsAssigneeApplicationNo. 182153 filed on 02/01/1994US Classes:702/183, Diagnostic analysis706/904, Manufacturing or machine (e.g., agricultural machinery, machine tool)706/912Manufacturing or machine (e.g., agricultural machinery, machine tool)ExaminersPrimary: Voeltz, Emanuel T.Assistant: Kemper, Melanie A. Attorney, Agent or FirmInternational ClassesG01D 001/14G05B 023/02 Foreign Application Priority Data1992-06-03 FRAbstractThe method of the invention establishes a reference state and a current state for an industrial evolutionary process from physical parameters measured on all the equipment items employing the evaluating process. These two states are compared, parameter by parameter, by resorting to fuzzy logic for classifying the quantities, and a diagnosis is established using expert rules. | |