Fluidic Actuator Diagnostics Using Break-Away Pressure Prediction
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Solution Overview
Problem
Current diagnostic methods for fluidic actuators only assess the state of wear based on the break-away pressure measured at the current position, lacking comprehensive evaluation and requiring additional position changes for prediction, which limits the assessment of functionality and remaining service life.
Innovation Solution
A diagnostic apparatus that determines a break-away pressure prediction value for a different prediction position using the existing break-away pressure measured value and stored reference information, allowing for a more comprehensive assessment without additional position changes or measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If break-away pressure is measured only at the current position, then the measurement process is simple, but the assessment of actuator state and remaining service life is incomplete
Solution Approach 1:
The diagnostic apparatus performs preliminary calculation of break-away pressure prediction values for future positions based on the currently measured break-away pressure value and stored reference information. This allows the system to predict wear states at positions the actuator has not yet reached, providing comprehensive assessment information without requiring actual measurements at all positions.
Solution Approach 2:
The system creates a virtual model of break-away pressure characteristics by storing reference break-away pressure information for multiple positions and using this stored data to calculate prediction values. This copying approach allows comprehensive assessment without physically moving the actuator to all measurement positions.
2Loss of information
If additional position changes are performed to obtain prediction values, then comprehensive wear assessment is achieved, but the diagnostic time and operational interruption increase
Solution Approach 1:
The system replaces physical mechanical movement (position changes) with mathematical calculation. Instead of moving the actuator to different positions to measure break-away pressure, the system uses the currently measured value and stored reference information to calculate prediction values for other positions, significantly reducing diagnostic time.
Solution Approach 2:
The system performs preliminary calculations of break-away pressure prediction values using stored reference information before actual operational needs arise. This allows comprehensive wear assessment to be obtained instantly without requiring time-consuming position changes and measurements at each position.
3Reliability
If break-away pressure measurement is performed at multiple positions, then comprehensive wear assessment is achieved, but the number of required measurements and operational steps increases
Solution Approach 1:
The system uses stored reference break-away pressure information as a virtual model to calculate prediction values for multiple positions. This copying approach provides comprehensive wear assessment reliability equivalent to multiple actual measurements, but with the efficiency of a single measurement combined with computational analysis.
Solution Approach 2:
The system introduces break-away pressure prediction values as an intermediary between the single measured value and the comprehensive wear assessment. These prediction values serve as a bridge that translates limited measurement data into comprehensive diagnostic information without requiring multiple actual measurements.
Data Source
AI summary
A diagnostic apparatus for a fluidic actuator, in particular a fluidic valve drive, which has an actuator element displaceable into different positions (x1, x2, xp1, xp2), wherein the diagnostic apparatus is configured to provide a first break-away pressure measured value (pi1) for a first position of the actuator element. The diagnostic apparatus is further configured to determine, based on the first break-away pressure measured value (pi1) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp1) for a first prediction position (xp1) of the actuator element, the first prediction position being different from the first position (x1).