Road Wheel Disturbance Detection via Velocity Signal Analysis
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Solution Overview
Problem
Existing vehicle steering systems fail to effectively detect and alert drivers to road wheel disturbances, such as wheel imbalance, which cause vibrations in the handwheel due to their reliance on rotational mean velocity and chassis design, leading to unnecessary vehicle servicing.
Innovation Solution
A control method and system that utilizes wheel sensors to estimate the magnitude of wheel disturbance based on wheel velocity, generating a disturbance status signal to alert drivers, comprising a frequency estimation module, wheel speed signal conditioning, disturbance magnitude estimation, and disturbance evaluation modules to identify and quantify road wheel disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional steering systems rely on rotational mean velocity and chassis design to detect wheel disturbances, then the system structure remains simple, but the detection precision and reliability of road wheel disturbance are insufficient
Solution Approach 1:
The patent replaces traditional mechanical vibration detection methods with an electronic control system that uses wheel velocity signals from existing wheel speed sensors. The control module processes these signals to detect wheel disturbances, substituting mechanical detection with electronic signal analysis, thereby improving detection precision without significantly increasing system complexity
Solution Approach 2:
The patent introduces a control module as an intermediary that processes wheel velocity signals to extract disturbance information. This intermediary component analyzes the velocity signals and generates disturbance status signals, enabling precise detection while utilizing existing sensor infrastructure rather than adding complex dedicated detection hardware
2Reliability
If no disturbance detection system is implemented, then the system complexity remains low, but unnecessary vehicle servicing occurs due to undetected wheel imbalances
Solution Approach 1:
The system enables the vehicle to self-diagnose wheel disturbances by processing wheel velocity signals through the control module. The disturbance detection and status signal generation allow the vehicle to identify its own issues (wheel imbalance, bearing faults) without external intervention, improving service reliability by enabling timely self-detection and alerting
Solution Approach 2:
The patent implements a feedback mechanism where the control module continuously monitors wheel velocity signals, detects disturbances, and generates disturbance status signals that provide feedback to the driver or system. This closed-loop feedback enables reliable detection and response to wheel conditions, preventing unnecessary servicing by accurately identifying when service is actually needed
Data Source
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AI summary
A control method for a vehicle is provided. The control method includes estimating a magnitude of wheel disturbance based on wheel velocity, and generating a disturbance status signal based on the magnitude of wheel disturbance.