Loader Stability Control Using Center-of-Gravity Feedback
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Solution Overview
Problem
Agricultural and construction equipment, such as tractors equipped with attachments like front loaders, face stability issues due to altered weight distribution, which can lead to tipping hazards, especially when the loader is raised and carries heavy loads.
Innovation Solution
A mobile work machine with a propulsion subsystem, steering subsystem, and a stability determination system that calculates the center of gravity and stability factor based on sensor data from speed, wheel angle, loader position, and ballast weight, controlling the machine to prevent tipping by adjusting speed or turn radius.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a front loader attachment is equipped to a tractor, then the operational capability and versatility of the machine is improved, but the weight distribution is altered causing increased tipping hazard and stability issues
Solution Approach 1:
The system calculates the center of gravity of the tractor-loader combination and determines ballast requirements to counterbalance the shifted weight distribution. By adding ballast weight to specific locations, the system restores stable weight distribution and prevents tipping hazards while maintaining the loader attachment for expanded operations.
Solution Approach 2:
The system dynamically adjusts operational parameters such as speed limits and turn radius restrictions based on real-time stability assessments. When the loader is raised or heavy loads are carried, the control system automatically modifies operating conditions to maintain stability, allowing the machine to adapt its operation to current weight distribution scenarios.
2Productivity
If the loader is raised to carry heavy loads, then the loading capability is improved, but the center of gravity increases causing increased lateral tip hazard
Solution Approach 1:
The system continuously monitors loader position, ballast weight, speed, and turn radius through sensors, calculating the center of gravity and stability factor in real-time. This feedback loop allows the control system to assess tipping hazards dynamically and adjust operational parameters or alert the operator when unstable conditions are detected, enabling safe heavy load operations.
Solution Approach 2:
The system proactively determines ballast requirements and stability characteristics before operation begins, and continuously assesses stability during operation. By calculating center of gravity and stability factors in advance and in real-time, the system prevents hazardous conditions rather than merely reacting to them, allowing operators to plan safe loading configurations.
3Stability of the object's composition
If ballast is added to change center of gravity, then the stability is improved, but the device complexity and weight increase
Solution Approach 1:
The system automatically calculates center of gravity, determines optimal ballast weight and placement, and monitors stability throughout operation without requiring manual intervention. This self-service approach simplifies the overall system by integrating stabilization functions into the existing control architecture, reducing the need for complex mechanical stabilization mechanisms while maintaining improved stability.
Data Source
AI summary
A mobile work machine includes a propulsion subsystem that propel the mobile work machine about a worksite. The mobile work machine includes a steering subsystem that steers the mobile work machine about the worksite. The mobile work machine includes a stability determination system that determines a stability factor based on a characteristic of the steering subsystem. The mobile work machine also includes a control system that controls the mobile work machine based on the stability factor.