Work Vehicle Travel Control with Slip-Adaptive Acceleration
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Solution Overview
Problem
Existing travel control systems for work vehicles fail to adapt to varying road conditions, leading to potential slipping and route deviation, especially on steep or slippery surfaces, due to a fixed acceleration upper limit value.
Innovation Solution
A travel control method that dynamically adjusts the acceleration upper limit based on the slip condition of the work vehicle to prevent slipping during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed acceleration upper limit value is used for the work vehicle, then the control system is simple and easy to operate, but the vehicle may slip on steep or slippery road surfaces leading to route deviation
Solution Approach 1:
The acceleration upper limit value is changed from a fixed parameter to a dynamic parameter that automatically adjusts based on detected slip conditions. The control unit monitors wheel slip and modifies the acceleration limit in real-time, allowing the system to adapt to varying road conditions without requiring complex manual intervention or multiple fixed-mode switches.
Solution Approach 2:
The system implements feedback control by continuously monitoring slip conditions and using this information to adjust the acceleration upper limit value. The control unit receives slip condition data and modifies the acceleration limit accordingly, creating a closed-loop control system that improves reliability while maintaining relatively simple system architecture.
2Productivity
If the acceleration upper limit value is increased to reach target speed faster, then productivity improves, but the risk of crawler slip increases on slippery surfaces
Solution Approach 1:
The acceleration upper limit value dynamically adjusts based on actual slip conditions rather than remaining fixed. On high-friction surfaces, the system allows higher acceleration values to maintain productivity, while on slippery surfaces it automatically reduces the acceleration limit to prevent slip, optimizing the balance between speed and reliability in real-time.
Solution Approach 2:
The system changes the acceleration parameter (upper limit value) based on detected slip conditions. By modifying this key parameter in response to environmental conditions, the system can maintain high productivity on suitable surfaces while preventing slip on challenging terrain, effectively decoupling the trade-off between speed and reliability.
Data Source
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AI summary
[Problem] To provide a travel control method, a travel control program, and a travel control system for a work vehicle, and a work vehicle that is less likely to slip during travel. [Solution] A travel control method for a work vehicle 1 includes: acquiring a slip condition related to a slip that occurs during travel of the work vehicle 1; and changing an acceleration upper limit value that is an upper limit value of acceleration until a vehicle speed of the work vehicle 1 reaches a target speed.