Dynamic Testing Method for Device Operating Envelope Characterization
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Solution Overview
Problem
Current testing methods for devices require prolonged durations to characterize the operating envelope, which is economically undesirable and limits the number of operating setpoints that can be tested, while maintaining the quality of information about operating parameters.
Innovation Solution
A technical test method that involves sampling, filtering, calculating variance and time derivative of operating parameters, and adjusting setpoints based on predetermined thresholds to reduce testing duration and increase the number of stages, ensuring stability and representative data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If predetermined duration for each operating stage is increased to ensure data quality, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent applies dynamics by making the duration of each operating stage variable rather than fixed. The method dynamically adjusts the duration based on real-time monitoring of operating parameter stability, allowing the test to adapt to actual device behavior and complete stages faster when parameters stabilize quickly.
Solution Approach 2:
The patent implements feedback by continuously monitoring operating parameters during each stage and using this information to determine when to transition to the next stage. The stability assessment of operating parameters provides feedback that controls the timing of stage transitions, eliminating the need for conservative predetermined durations.
2Loss of time
If individual duration of each operating stage is reduced to decrease overall testing duration, then loss of time is reduced, but measurement precision deteriorates
Solution Approach 1:
The testing method applies self-service by allowing the device under test to indicate when it has reached stable operation through its own operating parameters. The system monitors these parameters and automatically determines when sufficient data has been collected, eliminating the need for externally imposed predetermined durations that may be either too long or too short.
3Adaptability or versatility
If number of operating stages is increased to characterize operating envelope more completely, then adaptability is improved, but loss of time increases
Solution Approach 1:
The patent applies dynamics by making the duration of each operating stage variable rather than fixed. The method dynamically adjusts the duration based on real-time monitoring of operating parameter stability, allowing the test to adapt to actual device behavior and complete stages faster when parameters stabilize quickly.
Solution Approach 2:
The patent implements continuity of useful action by eliminating idle waiting time between operating stages. The method transitions continuously from one stage to the next as soon as stability criteria are met, maintaining continuous productive testing throughout the characterization process.
Data Source
AI summary
A technical test method for evaluating at least one operating parameter of a device over a sequence of a plurality of operating stages, each stage corresponding to a stable value of at least one operating setpoint of the device. The method including at least sampling values of the at least one operating parameter over time, filtering the sampled values in order to obtain a filtered signal for each operating parameter, calculating the variance of the sampled values for each operating parameter in a sampling window during the operating stage, calculating the absolute value of the time derivative of the filtered signal for each operating parameter, and changing the value of the at least one operating setpoint when, for each operating parameter, the variance of the sampled values and the absolute value of the time derivative of the filtered signal are less than respective predetermined lower thresholds.