Steering Play Section Update for Path Estimation
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Solution Overview
Problem
Vehicles with steering play sections experience changes in steering angle due to loading state and suspension type, requiring updated information to accurately specify the steering play section for path estimation.
Innovation Solution
A control device with a detection unit for steering angle, a determination unit to assess vehicle travel direction, and an update unit to adjust the steering angle range based on detected angles and travel conditions, ensuring accurate representation of the steering play section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the steering play section information is updated frequently to adapt to loading state changes, then the accuracy of path estimation is improved, but the computational load and system complexity increase
Solution Approach 1:
The system changes the parameter being monitored from continuous steering angle data to discrete play section determination results. By determining whether the steering angle falls within a predetermined play section range, the system adapts to loading state changes without requiring complex continuous adjustment mechanisms, thus improving path estimation accuracy while maintaining manageable system complexity
Solution Approach 2:
The steering angle range is segmented into a play section (where steering input does not produce wheel movement) and a non-play section (where steering input produces wheel movement). This segmentation allows the control device to simplify path estimation by identifying which section the current steering angle occupies, improving accuracy without proportionally increasing system complexity
2Adaptability or versatility
If the steering play section angle range is expanded to cover all possible steering angles, then the system becomes more robust to loading changes, but the precision of obstacle detection and path estimation deteriorates
Solution Approach 1:
The system dynamically determines the play section angle range based on actual vehicle operating conditions rather than using a fixed predetermined range. The control device continuously monitors steering angles and adjusts the play section determination accordingly, allowing the system to adapt to loading changes while maintaining precise obstacle detection by using the actual operating context to refine the angle range assessment
Data Source
AI summary
This control device is provided with a detection unit that detects a steering angle of a vehicle, a determination unit that determines whether or not the vehicle is moving straight ahead, and an updating unit that, on the basis of the steering angle detected by the detection unit and the determination result in the determination unit, updates play section information indicating an angle range of steering angles corresponding to a play section of the steering of the vehicle. When the vehicle is determined to be moving straight ahead by the determination unit and the steering angle detected by the detection unit is beyond the angle range of steering angles indicating the play section at the current point in time, the updating unit updates the angle range so that the detected steering angle is included in the angle range.