Torsional Vibration Model for Engine Component Condition Estimation
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Solution Overview
Problem
Current maintenance schedules for engine components rely on running hours rather than actual wear and functionality, leading to inefficiencies in condition-based maintenance that require experience-based thresholds and parameters.
Innovation Solution
A computer-implemented method using a torsional vibration model to calculate the torsional vibration response of engine components, which is then input into a cumulative damage model to estimate component condition, residual lifetime, and trigger maintenance requests or warnings based on damage thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If maintenance schedules are based on engine running hours, then maintenance timing is simple to determine, but it does not reflect actual component wear and functionality
Solution Approach 1:
The patent transforms the maintenance parameter from simple running hours to a comprehensive condition metric based on torsional vibration response. By monitoring changes in vibration characteristics and comparing them against baseline values, the system dynamically adjusts maintenance timing based on actual component degradation rather than fixed time intervals.
2Reliability
If condition-based maintenance uses experience-based thresholds and parameters, then maintenance decisions can be made, but clear knowledge of components and previous failures is required
Solution Approach 1:
The system performs self-diagnosis by automatically comparing measured torsional vibration response against pre-stored baseline values for healthy components. The computer system autonomously determines component condition without requiring expert intervention, eliminating the need for experienced personnel to interpret vibration data while maintaining high reliability through objective quantitative comparison.
Solution Approach 2:
The patent replaces subjective expert judgment with objective computational analysis. A computer system automatically processes vibration signals, compares them against baseline data, and generates maintenance recommendations, substituting human expertise with algorithmic decision-making that eliminates variability and knowledge dependency.
3Measurement precision
If torsional vibration response is calculated at multiple positions including positions not directly connected to sensors, then comprehensive component condition is assessed, but calculation complexity increases
Solution Approach 1:
The patent uses a torsional vibration model as an intermediary computational framework that translates limited sensor measurements into comprehensive component condition assessment. The model acts as a mathematical mediator that propagates vibration information from sensor locations to uninstrumented positions, enabling indirect measurement of component stress states without physical sensors at every location.
Data Source
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AI summary
The present invention relates to the field of monitoring and maintenance of mechanical systems. A method of the present invention uses a torsional vibration model of the mechanical system, such as an internal combustion engine, and sensors installed on the mechanical system to determine the condition of the mechanical system.