Remaining Life Estimation Across Multiple Apparatus Degradation Modes
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Solution Overview
Problem
Existing apparatus state estimation methods fail to accurately evaluate the remaining life due to various degradation factors such as crack occurrence, creep, and corrosion in high-temperature environments, beyond just creep damage.
Innovation Solution
An apparatus state estimation device that acquires state quantities, specifies load history, and calculates parameters for remaining life across multiple degradation types, including stress width and accumulated life consumption rate, to manage life expectancy effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only creep damage evaluation is performed, then the evaluation process is simple, but the comprehensive life assessment is insufficient
Solution Approach 1:
The patent segments the life assessment into multiple independent degradation factors (creep damage, fatigue damage, corrosion, oxidation) that can be evaluated separately and then integrated. Each degradation factor is assessed using dedicated calculation units that process specific parameters, allowing comprehensive evaluation without excessive overall complexity.
Solution Approach 2:
The evaluation system is designed with multi-functionality to handle various degradation mechanisms simultaneously. The integrated assessment unit can process multiple types of damage calculations and combine them into a unified life assessment, making the system versatile for different degradation scenarios.
2Reliability
If multiple degradation factors are evaluated comprehensively, then the life assessment accuracy is improved, but the evaluation complexity increases
Solution Approach 1:
The system divides the complex multi-factor degradation evaluation into separate modular calculation units, each handling a specific degradation mechanism. This segmentation allows comprehensive assessment while managing complexity through structured organization of evaluation tasks.
Solution Approach 2:
The integrated assessment unit acts as an intermediary that receives results from various degradation evaluation modules and synthesizes them into a unified life assessment. This mediator coordinates the complex interactions between different degradation factors without requiring direct complex integration of all parameters simultaneously.
3Measurement precision
If detailed load history analysis is performed, then the remaining life calculation precision is improved, but the data processing time increases
Solution Approach 1:
The system performs preliminary processing of load history data by extracting critical parameters (maximum load, minimum load, cycle counts) before detailed remaining life calculations. This preliminary action prepares the data in advance, reducing the processing time required for subsequent precise calculations.
Solution Approach 2:
The patent transforms detailed load history data into simplified representative parameters (equivalent stress ranges, cycle distributions) that capture the essential degradation information. This parameter transformation maintains calculation precision while significantly reducing the computational burden of processing complete load histories.
Data Source
AI summary
A state quantity acquisition unit acquires a state quantity of a target apparatus including a temperature of the target apparatus. A load specification unit specifies a load history of the target apparatus, based on the state quantity. A remaining life calculation unit calculates a parameter related to a remaining life of the target apparatus for each of a plurality of degradation types, based on the load history specified by the load specification unit.