FT Diagram Creation Assistance Device for Automated Fault Tree Analysis
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Solution Overview
Problem
Fault tree analysis (FTA) requires specialized knowledge and is labor-intensive, making it challenging to create accurate and efficient diagrams for identifying the causes of device failures and improving reliability.
Innovation Solution
An FT diagram creation assistance device that classifies events as hardware, system, or control system faults, expands events into lower events based on input/output relationships, and examines physical quantities to create block diagrams, reducing workload and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fault tree analysis is performed manually with specialized knowledge, then accuracy of fault cause identification is improved, but workload and time consumption increase significantly
Solution Approach 1:
The patent introduces an intermediary system (FT diagram creation assistance device) that mediates between the complex FTA methodology and the user. This device automatically performs event expansion, classification, and diagram generation based on input failure information, eliminating the need for manual execution of complex FTA procedures while maintaining high accuracy through algorithmic analysis of physical quantities and event relationships.
Solution Approach 2:
The system enables self-service by automatically generating FT diagrams from user-provided failure information without requiring users to manually perform event expansion, classification, or diagram construction. The automated processing of physical quantities and logical relationships allows non-experts to create accurate FT diagrams independently, significantly reducing both workload and time consumption.
2Measurement precision
If comprehensive knowledge and specialization are required for FTA, then accuracy of analysis is improved, but ease of operation deteriorates
Solution Approach 1:
The assistance device acts as an intermediary that encapsulates complex FTA knowledge and methodologies. It automatically performs event expansion, classification into hardware/system/control categories, and diagram generation based on physical quantity relationships, allowing users without specialized knowledge to achieve accurate analysis results through simple information input.
Solution Approach 2:
The patent replaces the manual mechanical process of FTA (requiring specialized knowledge and manual diagram construction) with an automated computational system. The system uses algorithms to expand events, classify failures, analyze physical quantities, and generate diagrams automatically, substituting expert human effort with automated processing that maintains accuracy while dramatically improving ease of operation.
3Manufacturing precision
If manual event expansion and classification is performed, then accuracy of FT diagram is improved, but productivity decreases
Solution Approach 1:
The system performs self-service by automatically executing event expansion, classification, and diagram generation without manual intervention. It processes failure information, expands events based on predefined relationships, classifies them into hardware/system/control categories, and generates complete FT diagrams automatically, maintaining high accuracy while dramatically increasing productivity through automated batch processing.
Solution Approach 2:
The system performs preliminary actions by pre-defining event expansion rules, classification criteria, and diagram generation templates. These preliminary configurations enable rapid automated processing of failure information, allowing the system to quickly generate accurate FT diagrams without requiring manual execution of each analysis step, thereby significantly improving productivity.
Data Source
AI summary
An event is classified as a fault of hardware or a fault of a system or a control system. When the event is classified as the fault of the hardware, the event is expanded into lower events, physical quantities of the event and the lower events are acquired, and it is examined whether the event is expanded properly or not based on relationship between the physical quantity of the event and the physical quantities of the lower events. When the event is classified as the fault of the system or the control system, a block diagram of the system or the control system is created, and the event is expanded into the lower events based on input/output relationship in the block diagram of the system or the control system.