Hitachi, Ltd.

Yuuki Shimizu

Akira Kamei

Makoto Onodera

Masayuki Hariya

Yohei Tanno

Yuki Itabayashi

This failure tree generation device includes: a causal relationship storage unit that stores information indicating a linkage of the causal relationship of defects of respective component parts constituting subjects to be analyzed in a manner such that the information is associated with the connection relationship of the respective component parts; a system-level failure tree generation unit that generates, for each of the component parts and on the basis of component part constitution information indicating the constitution of component parts to be analyzed and component part connection information indicating the connection relationship of the respective component parts, first element information which is information indicating disturbance having occurred in information transfer between the respective component parts and which indicates the relationship between each of the component parts and a phenomenon having occurred on the component part, and generates, on the basis of the respective items of first element information, system level failure tree information indicating the causal relationship of defects of the component parts; and an equipment/component part level failure tree generation unit that searches for the causal relationship storage unit on the basis of the component part constitution information and the component part connection information, that generates two or more items of second element information indicating information relating to a plurality of events connecting to any one first element and indicating the relationship between the respective component parts and phenomena having occurred on the respective component parts, and that generates, on the basis of the respective items of the second element information, equipment/component part level failure tree information indicating the causal relationship of defects of the component parts, by way of a hierarchical structure.

Fault tree generation device and fault tree generation method

Personal dependency related to fault tree construction is reduced, and the reliability of an operating machine is improved by improving the accuracy of a fault diagnosis. The present invention provides a fault diagnosis device for a machine in operation, the device comprising: an abnormality degree analysis unit that calculates the abnormality degree of each component configuring the machine by comparing input/output data of the machine with a threshold value; a fault tree automatic generation unit that holds a fault tree of each component in which the fault of each component and the fault of a sensor in each component are associated with each other and generates the fault tree of the entire machine by coupling the fault trees of the components on the basis of a correlation between the input/output data of each component; a fault analysis unit that analyzes the fault of the machine on the basis of the abnormality degree and information of the fault tree of the entire machine; and a display unit that displays information analyzed by the fault analysis unit and issues an alarm.

Fault diagnosis device, fault diagnosis method and machine to which fault diagnosis device is applied

A design support device includes a unit that accepts registration of normal CAD data with a past record and violation CAD data determined to have violated portion with respect to three-dimensional CAD data, a unit that acquires a parameter related to a design rule from CAD data to be evaluated, a unit that calculates a statistical value of the acquired parameter and calculates a value of an influence degree t that explains a violation of each parameter, and a unit that presents a scatter diagram plotting normal CAD data and violation CAD data to be evaluated and a boundary line subjected to cluster analysis, on a two-dimensional coordinate system, according to a combination of parameters designated by a user (evaluator).

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Tokyo, Japan

Yuuki Shimizu