Brake Pressure Valve Degradation Detection by Waveform Matching
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Solution Overview
Problem
Existing brake control devices cannot identify which component is degraded when a control valve deteriorates, leading to unadjustable pressure output and ineffective braking.
Innovation Solution
A degradation detection system that includes a simulator, waveform identifier, and degradation identifier to analyze pressure waveforms and identify degraded components in pressure regulating valves by comparing calculated and detected response pressures using a physical model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake control device detects deviation between command pressure and feedback pressure, then maintenance needs can be determined, but the specific degraded component cannot be identified
Solution Approach 1:
The patent segments the pressure control device into distinct components (control valve, pressure regulating valve, etc.) and assigns specific detection characteristics to each. By analyzing which component's expected pressure characteristics deviate from actual measurements, the system can identify the specific degraded component rather than just detecting general maintenance needs.
Solution Approach 2:
The patent utilizes changes in pressure parameters (command pressure, response pressure, pressure deviation) to identify component degradation. By monitoring how pressure responds to electrical commands and comparing actual pressure characteristics against expected characteristics for each component, the system can determine which specific component has degraded.
2Device complexity
If the pressure control device operates without component identification capability, then the system remains simple, but targeted maintenance cannot be performed
Solution Approach 1:
The patent enables the pressure control device to self-diagnose component degradation through built-in detection units that monitor pressure characteristics. The system automatically identifies which component has degraded by analyzing pressure response patterns, eliminating the need for complex external diagnostic equipment while enabling targeted maintenance.
Data Source
AI summary
A degradation detection system includes: a storage that stores measured values of command pressure and measured values of response pressure; and a simulator that calculates, using a physical model, the response pressure in accordance with the command pressure, thereby obtaining a waveform of the calculated response pressure corresponding to a waveform of the command pressure in a case in which the command pressure is changed. A waveform identifier identifies a waveform of the calculated response pressure that matches a waveform of the detected response pressure. A degradation identifier identifies a degraded component of a pressure regulating valve from a value of parameter acquired by the waveform identifier and a normal range defined for the parameter.