Crash Dummy Response Curve Alignment for Impact Limit Values
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Solution Overview
Problem
Current methods for constructing performance limit values for crash dummy parts fail to accurately evaluate their technical performance in complex crash scenarios, as they are based on single test conditions and do not account for varying impact and crash loads encountered in real-world vehicle crashes.
Innovation Solution
A method that determines a standard response curve and alignment times for crash dummy response curves under different impact test conditions, aligns these curves based on cumulative differences, and calculates an impact response performance limit value function to provide reliable performance evaluations across various test conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If performance limit values are constructed based on single test condition and repeated tests, then the construction process is simple, but the accuracy of evaluating dummy performance in complex crash scenarios is insufficient
Solution Approach 1:
The patent segments the continuous response curves into multiple discrete data points at specific time intervals. This segmentation allows for precise comparison and alignment of response characteristics across different test conditions while maintaining a systematic construction approach for performance limit values
Solution Approach 2:
The patent introduces a new dimension by constructing performance limit values that accommodate multiple test conditions rather than relying on a single test condition. This multi-dimensional approach enables accurate evaluation across varying crash scenarios while organizing data systematically
2Adaptability or versatility
If performance limit values are based on single test condition, then the test protocol is simple, but it cannot account for varying impact and crash loads in real-world scenarios
Solution Approach 1:
The patent creates universal performance limit values that can be applied across multiple test conditions and crash scenarios. This multi-functional approach allows a single set of limit values to evaluate dummy performance whether the dummy is used in vehicle crash tests, barrier tests, or other impact scenarios, eliminating the need for separate limit values for each test type
Solution Approach 2:
The patent performs preliminary alignment and normalization of response curves from multiple test conditions during the limit value construction phase. By pre-processing the data to account for variations in test conditions, the method eliminates the need for additional corrective tests later, saving time while ensuring comprehensive scenario coverage
3Measurement precision
If response curves with different phases, amplitudes and types are compared directly, then the comparison is straightforward, but the accuracy of limit value for each dummy part is affected
Solution Approach 1:
The patent applies local quality by performing alignment and normalization operations on specific segments of response curves rather than treating them as uniform entities. This allows for precise matching of corresponding phases and features (such as peak responses and transition periods) across curves with different overall characteristics, ensuring accurate part-specific limit values
Solution Approach 2:
The patent transforms response curves by adjusting parameters such as time scaling, amplitude normalization, and phase alignment. These parameter changes enable curves with different characteristics to be compared on a common basis, allowing accurate determination of performance limit values for each dummy part while accounting for variations in response behavior
Data Source
AI summary
The present invention relates to the field of passive safety testing of vehicles, in particular to a construction method for an impact response performance limit value of a crash dummy and an electronic device. The method includes: determining, according to response curves of the crash dummy under different impact test conditions, a standard response curve and alignment starting time and ending time of each response curve; aligning, according to differences between other response curves except the standard response curve and the standard response curve, other response curves except the standard response curve with the standard response curve; and determining, according to all the aligned response curves, an impact response performance limit value function of the crash dummy, where the differences include cumulative differences or cumulative variances. The method can truly, accurately and effectively construct a performance limit value of a dummy part under various impact tests.