Four Wheel Steering Anomaly Locking and Correction
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Solution Overview
Problem
Existing four-wheel steering vehicles struggle to adequately handle anomalies in the steering of either the front or rear wheels, leading to suboptimal performance and control.
Innovation Solution
A vehicle system comprising first and second steering drivers, detectors, locks, and controllers that detect anomalies in steering angles, lock non-functional wheels, and adjust the steering angles of operational wheels to maintain normal operation, allowing for appropriate control and travel even when one steering system is faulty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a four-wheel steering system is implemented, then vehicle maneuverability and control performance are improved, but the complexity of the steering mechanism increases
Solution Approach 1:
The steering system is divided into independent front and rear steering mechanisms, each with its own driver, detector, and controller. This segmentation allows the system to handle anomalies in one steering mechanism without affecting the other, resolving the contradiction by improving reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The system changes the operational parameters of the steering mechanism by switching between normal four-wheel steering mode and anomaly handling mode. When an anomaly is detected, the system modifies the steering angles and operational states of the affected components, allowing the vehicle to maintain controllability despite the increased complexity of the steering system.
2Reliability
If anomaly detection and correction mechanisms are added, then steering reliability is improved, but the device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where detectors monitor the actual steering angles and feed this information back to the controllers. The controllers compare detected angles with expected angles and automatically correct deviations by adjusting the steering drivers. This feedback-based approach improves reliability through automatic anomaly detection and correction without requiring complex manual intervention systems.
Solution Approach 2:
The steering system performs self-diagnosis and self-correction when anomalies are detected. The controllers automatically identify steering anomalies, lock the affected steering mechanism, and adjust the operational parameters of the remaining functional components. This self-service capability improves reliability while keeping the control system complexity manageable by eliminating the need for external diagnostic and correction mechanisms.
3Reliability
If the steering system locks non-functional wheels, then vehicle control safety is improved, but the operational flexibility decreases
Solution Approach 1:
The steering system dynamically adjusts its operational mode based on the detected anomaly state. When an anomaly is detected, the system locks the affected steering mechanism and transitions to a modified operational mode where only the functional steering mechanism remains active. This dynamic adaptation ensures vehicle control safety by preventing further damage from the anomaly while maintaining sufficient operational flexibility through the remaining functional components.
Solution Approach 2:
The system prepares for potential anomalies by having pre-programmed correction algorithms and lock mechanisms ready. When an anomaly occurs, the pre-prepared correction measures are immediately activated, locking the non-functional wheels and adjusting the operational parameters of the functional components. This beforehand preparation ensures rapid response to anomalies, improving control safety while maintaining operational flexibility through pre-planned adaptation strategies.
Data Source
AI summary
A vehicle includes first and second steering drivers that steer first and second wheel pairs, a lock that locks the first wheel pair to be non-steerable, a first steering controller that controls the first steering driver in accordance with a first steering angle, and a second steering controller that controls the second steering driver in accordance with a second steering angle. The first steering controller controls the lock to lock the steering of the first wheel pair upon detecting anomaly in the steering of the first wheel pair from the steering angle and a steering detection angle of the first wheel pair. The second steering controller controls the second steering driver in accordance with a second corrected steering angle, if the steering of the first wheel pair exhibits anomaly.