Trailer Reverse Steering Control for Erratic Input Protection
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Solution Overview
Problem
Existing reverse driving assistance systems for towing vehicles with trailers often lead to erratic steering due to rapid and frequent changes in direction, causing thermal degradation and unnecessary loading of steering components, which can result in system failure.
Innovation Solution
A driver-assisting control system that includes an operator control element for specifying a target articulation angle, a sensor device to sense the current angle, a display unit, and an electronic control unit with an evaluation unit to detect implausible specifications and a protection unit to restrict the assistance functionality if erratic steering is detected, by damping the steering behavior or switching off the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator control element allows rapid and frequent steering changes to improve maneuverability, then the ease of operation is improved, but the steering components are subjected to unnecessarily high loading causing thermal degradation
Solution Approach 1:
The control unit continuously monitors the steering behavior through the sensor device and comparison unit, comparing target articulation angles with actual articulation angles. When erratic steering is detected (exceeding threshold values), the system provides feedback by restricting the reverse driving assistance functionality, thereby preventing further thermal degradation while maintaining operational flexibility
Solution Approach 2:
The system dynamically adjusts the level of assistance based on detected steering patterns. The control unit can adaptively restrict the reverse driving assistance functionality when erratic steering is detected, allowing normal operation under normal conditions while automatically reducing assistance when thermal degradation risks arise
2Reliability
If the system detects and restricts reverse driving assistance functionality to protect against thermal degradation, then the reliability is improved, but the ease of operation deteriorates due to restricted functionality
Solution Approach 1:
The system applies preliminary anti-action by detecting erratic steering patterns before severe thermal degradation occurs. The control unit monitors steering frequency and amplitude, and when threshold values are exceeded, it preemptively restricts the reverse driving assistance functionality to prevent further harmful effects on the steering components
Solution Approach 2:
The system performs self-service by automatically monitoring its own operational parameters through the sensor device and control unit. The evaluation unit autonomously determines when erratic steering occurs and the control unit automatically restricts functionality without requiring external intervention, enabling the system to protect itself from thermal degradation
Data Source
AI summary
A reverse driving assistance system assists a driver in steering a towing vehicle having a trailer. The system has an operating element for specifying a target articulation angle, a sensor device for detecting the current articulation angle of the vehicle-trailer combination, a display unit at least for displaying the specified target articulation angle, and an electronic control unit connected to the aforementioned components. The control unit also has an evaluation unit for recognizing an implausible specification of the target articulation angle and a protection unit for restricting the reverse driving assistance functionality if an implausible target specification is recognized. An implausible specification of the target articulation angle can be recognized at least by detecting the frequency of the change in direction of the operating element within a predetermined time and by comparing the detected value with a defined threshold value. The reverse driving assistance functionality is restricted if an implausible target specification is detected as a result of this threshold value being exceeded.