Wheel Acceleration Components for Robust Rotation Angle Estimation
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Solution Overview
Problem
Existing wheel status estimation systems, particularly in heavy-duty vehicles, lack reliable and accurate methods for determining wheel rotational angle and motion due to the failure or inaccuracy of wheel speed sensors, leading to inadequate motion prediction and handling.
Innovation Solution
Utilizing a computer system with processing circuitry to analyze acceleration data from a vehicle's accelerometer, breaking down the data into gravitational, centripetal, and road-contact acceleration components to estimate wheel rotational angle and motion, enhancing accuracy through frequency and amplitude analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wheel speed sensors are used to measure wheel status, then wheel rotational speed and angle can be obtained, but the system reliability deteriorates when sensors fail or report inaccurate data
Solution Approach 1:
The patent uses acceleration data from accelerometers as an intermediary measurement to estimate wheel status. Instead of directly measuring wheel speed and angle with potentially failing sensors, the system measures acceleration and derives wheel status through signal processing and estimation algorithms, providing a redundant measurement path that improves reliability
Solution Approach 2:
The patent replaces traditional mechanical/electrical wheel speed sensors with an accelerometer-based measurement system. By using acceleration measurements and mathematical estimation rather than direct sensor measurement, the system eliminates dependency on traditional wheel speed sensors and their associated failure modes
2Measurement precision
If acceleration data is decomposed into multiple components, then estimation accuracy improves, but computational complexity increases
Solution Approach 1:
The patent segments the total acceleration signal into distinct components (gravitational acceleration, centripetal acceleration, and road-contact acceleration) that correspond to different physical phenomena. This segmentation allows each component to be processed and analyzed separately, improving estimation accuracy while making the complex processing task more manageable through modular analysis
Data Source
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AI summary
A computer system (900) comprising processing circuitry (902) configured to handle acceleration data of an accelerometer (2) is provided. The accelerometer (2) is arranged to measure acceleration of a wheel (10) of a vehicle (1). The processing circuitry (902) is configured to obtain acceleration data from the accelerometer (2). The acceleration data is indicative of a total acceleration measured by the accelerometer (2). The processing circuitry (902) is configured to derive from the acceleration data, a set of acceleration components. Each component in the set of acceleration components indicates a respective portion of the total acceleration. The processing circuitry (902) is configured to estimate a status of the wheel (10) based on the set of acceleration components. The status of the wheel (10) comprises a rotational angle of the wheel (10) and/or a rotational motion of the wheel (10).