Work Vehicle Control System for Smooth Excavation
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Solution Overview
Problem
Conventional control systems for work vehicles struggle to maintain efficient excavation with good finish quality, especially in terrains with large undulations, as they tend to raise the blade quickly when load increases, leading to rough terrain and decreased quality.
Innovation Solution
A control system that includes a controller programmed to obtain a first design topography, determine a second design topography positioned above the first, and generate command signals to operate the work implement according to the second topography, adjusting the tilt angle when necessary to prevent excessive load and maintain smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade is controlled to follow the design topography with load control, then shoe slip can be suppressed and work efficiency is improved, but when the blade is in a position deep in the design topography with respect to actual topography, the load applied to the blade increases very quickly causing the blade to be raised very quickly, making it difficult to carry out excavating work smoothly and decreasing finish quality
Solution Approach 1:
The control system determines a second design topography that is positioned above the first design topography before excavation begins. This preliminary adjustment creates a buffer zone that prevents the blade from being raised too quickly when encountering deep positions in the original design topography, thereby maintaining both work efficiency and finish quality
2Productivity
If the blade is raised quickly when load increases to prevent shoe slip, then work efficiency is maintained, but the terrain becomes rough and finish quality decreases
Solution Approach 1:
By pre-determining a second design topography positioned above the first, the system prepares a modified reference that accounts for terrain undulations in advance. This prevents sudden blade raises that would create rough terrain, allowing the blade to follow a smoother path while maintaining work efficiency
Data Source
AI summary
A work vehicle includes a work implement. A control system for the work vehicle includes a controller that controls the work implement. The controller obtains a first design topography. The controller determines a second design topography. At least a portion of the second design topography is positioned above the first design topography. The controller generates a command signal to operate the work implement in accordance with the second target design topography. The controller changes a tilt angle of the work implement when at least a portion of the second design topography is positioned below the first design topography.