Articulated Machine Differential Locking for Rollover Prevention
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Solution Overview
Problem
Articulated machines, such as construction trucks with payload carriers, are prone to rollover on uneven terrain due to independent roll and yaw angles, which can lead to unsafe operating conditions and material ejection, as operators are unaware of unsafe angles.
Innovation Solution
The system includes sensors on each frame to provide position information, a controller to determine the relative position and compare it to predefined safety limits, and a differential locking mechanism that automatically locks when unsafe angles are detected, preventing rollover by coupling the frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the articulated machine operates on uneven terrain with independent frame roll and yaw angles, then the machine can navigate complex terrain, but the operator becomes unaware of unsafe angles leading to roll-over risk
Solution Approach 1:
The system continuously monitors the relative position between frames using sensors and provides real-time feedback to the operator through visual or audible warnings when unsafe angles are detected, resolving the information loss problem while maintaining terrain adaptability
Solution Approach 2:
A controller system acts as an intermediary between the independent frames, measuring and comparing their relative positions to detect unsafe conditions, thereby providing the operator with critical safety information without restricting terrain navigation capability
2Adaptability or versatility
If the differential allows independent wheel speeds for articulation movement, then the machine can operate on uneven ground, but the frames can roll independently beyond safety limits causing roll-over
Solution Approach 1:
The system dynamically adjusts the differential locking state based on real-time frame position monitoring, keeping the differential unlocked for normal articulation movement but automatically locking it when unsafe angles are detected, thus maintaining both mobility and stability
Solution Approach 2:
The differential locking system automatically monitors and protects itself by detecting unsafe conditions and locking the differential without operator intervention, ensuring machine stability while preserving articulation movement capability during safe operation
Data Source
AI summary
An articulated machine having a first frame and a second frame supported by first and second wheel assemblies respectively is provided. The machine includes a first sensor and a second sensor to provide position information of the first frame and the second frame respectively. The machine includes a drive train to couple the front and rear wheel assembly, and having an inter axle differential to facilitate the front and the rear wheel assembly to move at different speeds. The machine includes a controller to compare position of the first frame with position of the second frame to determine relative position of the second frame with respect to the first frame. The controller compares the relative position of the second frame with a predefined position limit. The controller selectively locks the inter axle differential when the determined relative position of the second frame is greater than the predefined position limit.