Work Vehicle Path Control for Mode-Based Turning Radius
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Solution Overview
Problem
Existing automatic travel systems for work vehicles fail to account for the travel driving mode, leading to inefficient work paths with improper turning radii, resulting in reduced efficiency when switching between four-wheel and two-wheel driving modes.
Innovation Solution
An automatic travel system that includes a travel driving mode selection unit, travel path generation unit, and automatic travel control unit, which generates and controls paths based on selected driving modes, ensuring proper turning radii and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection path is generated with an assumption that the travel driving mode is four-wheel travel driving mode, then a sufficient turning radius is secured for making the work vehicle perform turning traveling, but the headland becomes large and the distance of the work path becomes short, causing reduction in work efficiency
Solution Approach 1:
The system dynamically adjusts the turning radius parameter in the connection path generation based on the selected travel driving mode. When four-wheel travel driving mode is selected, a larger turning radius is applied; when two-wheel travel driving mode is selected, a smaller turning radius is applied. This dynamic parameter adjustment resolves the contradiction by matching the turning radius to the actual vehicle capabilities, ensuring both sufficient turning capability and optimal work efficiency.
Solution Approach 2:
The invention changes the turning radius parameter according to the travel driving mode selection. The travel driving mode selection unit selects between four-wheel and two-wheel travel driving modes, and the connection path generation unit generates connection paths with different turning radii corresponding to each mode. This parameter change approach allows the system to optimize both turning capability and work path length by selecting the appropriate turning radius based on the driving mode.
2Productivity
If a connection path is generated with an assumption that the travel driving mode is two-wheel travel driving mode, then the headland can be smaller and the distance of work paths can be longer, but a sufficient turning radius is not secured for making the work vehicle perform turning traveling in four-wheel travel driving mode
Solution Approach 1:
The system dynamically adjusts the turning radius parameter based on the selected travel driving mode. When two-wheel travel driving mode is selected, a smaller turning radius is applied to maximize work path length and minimize headland. When four-wheel travel driving mode is selected, a larger turning radius is applied to ensure sufficient turning capability. This dynamic adjustment resolves the contradiction by adapting the turning radius to the actual vehicle configuration.
Solution Approach 2:
The invention implements parameter changes by selecting different turning radius values based on the travel driving mode. The travel driving mode selection unit determines whether four-wheel or two-wheel travel driving mode is selected, and the connection path generation unit accordingly generates connection paths with appropriate turning radii. This ensures that the turning radius parameter is optimized for each driving mode, resolving the contradiction between work efficiency and turning capability.
3Device complexity
If the target travel path is generated without considering the travel driving mode, then the system complexity is reduced, but the work efficiency is reduced due to improper turning radii
Solution Approach 1:
The connection path generation unit is designed to handle multiple travel driving modes (four-wheel and two-wheel) through a single unified mechanism. The unit receives the selected travel driving mode from the travel driving mode selection unit and automatically adjusts the turning radius parameter accordingly. This multi-functional design allows the system to maintain relatively simple structure while achieving optimized performance for different driving modes, resolving the contradiction between system complexity and work efficiency.
Data Source
AI summary
The automatic travel system generates a target travel path in a travel driving mode, improves work efficiency, and causes a work vehicle to automatically travel while turning at an appropriate turning radius in the travel driving mode. The system includes: a travel driving mode selection unit that selects one travel driving mode, from among a plurality of travel driving modes, as a travel driving mode for a work vehicle; a travel path generation unit that generates a target travel path by using a turning radius corresponding to the travel driving mode selected by the travel driving mode selection unit; and an automatic travel control unit that performs automatic travel control. A work vehicle is made to automatically travel, based on positioning information for the work vehicle and obtained by a satellite positioning system, along the target travel path generated by the travel path generation unit.