Work Vehicle Braking Control via Location Accuracy
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Solution Overview
Problem
Work vehicles face challenges in accurately stopping at target locations while minimizing impact, as existing systems struggle to balance location accuracy and braking force effectively, leading to reduced accuracy and increased impact during braking.
Innovation Solution
A work vehicle control system that utilizes location information generating units such as GNSS, scan matching navigation, and dead reckoning to determine braking force based on location accuracy, adjusting braking force to optimize stopping precision and reduce impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If large braking force is applied in the vicinity of the target location, then the work vehicle can stop with good accuracy, but the impact that occurs on the work vehicle is increased
Solution Approach 1:
The braking force is made dynamic rather than fixed. The control unit adjusts the braking force magnitude based on the measured location accuracy. When location accuracy is high, smaller braking force is applied; when location accuracy is low, larger braking force is applied. This dynamic adjustment resolves the contradiction by adapting the braking force to the actual positioning conditions.
Solution Approach 2:
The braking force parameter is changed based on the location accuracy parameter. The control unit modifies the braking force magnitude according to the measured location accuracy, transforming a static braking system into an adaptive one that optimizes the balance between stopping accuracy and impact reduction.
2Measurement precision
If the work vehicle stops at the target location with high accuracy, then the location accuracy requirement is met, but the impact on the work vehicle increases
Solution Approach 1:
The braking force is dynamically adjusted based on the measured location accuracy. When the location accuracy is already high, the system reduces the braking force magnitude, thereby maintaining the stopping accuracy while reducing the impact on the work vehicle.
Solution Approach 2:
The braking force parameter is changed according to the location accuracy measurement. The control unit modifies the braking force magnitude based on the measured location accuracy, optimizing the balance between meeting accuracy requirements and minimizing impact.
3Manufacturing precision
If the work vehicle reduces velocity to target velocity at the target location, then the stopping accuracy is improved, but the impact on the work vehicle is increased
Solution Approach 1:
The braking force is dynamically adjusted based on location accuracy measurements. When location accuracy is high, the system applies smaller braking force to reduce impact; when location accuracy is low, larger braking force is applied to maintain stopping accuracy.
Solution Approach 2:
The braking force parameter is modified based on the location accuracy parameter. The control unit changes the braking force magnitude according to measured location accuracy, optimizing the balance between stopping accuracy and impact reduction.
Data Source
AI summary
A work vehicle control system controls a work vehicle having a braking device. The work vehicle control system includes a location information generating unit that obtains and outputs a location of the work vehicle, and a control unit that controls the braking device based on location information of the work vehicle obtained from the location information generating unit. The control unit determines braking force that controls the braking device based on first accuracy that is accuracy of the location information of the work vehicle obtained from the location information generating unit.