Steering Measurement Device for Automated Vibration Factor Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for suppressing vibrations in electric power steering systems require significant time and effort to analyze and set controller parameters, often leading to inefficient vibration suppression due to the lack of a systematic approach to identify and adjust for vibration factors.
Innovation Solution
An input/output device and steering measurement device that includes a vibration factor estimation unit to analyze and estimate vibration factors by extracting feature amounts from response data, reducing the need for manual analysis and minimizing the number of operations required for controller settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual analysis of vibration factors is performed by users (testers), then vibration factors can be identified, but significant time and effort are required
Solution Approach 1:
The vibration measurement device performs self-diagnosis by automatically analyzing vibration data to identify vibration factors. The device extracts feature amounts from acceleration signals, compares them against stored vibration factor information, and autonomously determines the cause of vibrations without requiring manual analysis by testers, thus resolving the contradiction between identification accuracy and time consumption
Solution Approach 2:
The patent replaces the manual mechanical analysis process with an automated electronic system. The vibration measurement device uses acceleration sensors, signal processing circuits, and comparison logic to automatically identify vibration factors, substituting the manual tester's analytical work with an electronic measurement and comparison system that achieves both high accuracy and efficiency
2Ease of operation
If controller parameters are adjusted by trial and error without specifying vibration factors, then parameter adjustment can be performed, but vibration suppression is ineffective and time-consuming
Solution Approach 1:
The vibration measurement device performs preliminary identification of vibration factors before controller parameter adjustment. By first determining the specific cause of vibrations through automatic analysis and then using this information to guide parameter adjustments, the system ensures that parameter changes are targeted and effective, eliminating the need for blind trial-and-error approaches
Data Source
AI summary
An input/output device includes: a vibration factor estimation circuitry configured to be connected for communication to a controlling circuitry for controlling a rotating machine provided in an electric power steering device provided in a vehicle to generate a steering assist force for a steering, to acquire, during a steering operation of the steering, response data indicating a response to a steering operation of the electric power steering device detected by the controlling circuitry, to extract a feature amount related to a vibration or a noise generated during the steering operation of the steering from the response data, and to estimate a vibration factor candidate, which is a candidate for a vibration factor, based on the feature amount; and an output circuitry configured to output the vibration factor candidate.