Work Implement Topography Feedback for Accurate Excavation Control
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Solution Overview
Problem
Conventional systems for automatically controlling work machines, such as bulldozers, fail to ensure the work implement reaches the target profile due to factors like soil hardness or machine capacity, leading to uneven topography and reduced work quality and efficiency.
Innovation Solution
A control system that acquires current topography data, determines a target design topography, generates command signals to operate the work implement, and modifies the target design topography upwardly based on excavated data to adjust for deviations, allowing the work implement to accurately follow the target profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the work implement operates along the preset target profile, then work efficiency is improved, but the work implement cannot reach the target profile due to soil hardness or machine capacity, leading to reduced work quality
Solution Approach 1:
The control system continuously acquires actual topography data during excavation, compares it with the target design topography, and automatically adjusts the target profile based on the deviation. This closed-loop feedback mechanism allows the system to adapt to soil hardness and machine capacity limitations in real-time, ensuring both work efficiency and topography accuracy are maintained
Solution Approach 2:
The target design topography is transformed from a static preset profile to a dynamic adjustable profile that automatically modifies its position upwardly based on actual excavation conditions. This dynamic adjustment enables the system to maintain optimal operation while adapting to varying soil conditions and machine capabilities
2Manufacturing precision
If the target design topography is modified upwardly based on excavated topography, then work quality is maintained, but additional processing steps are required
Solution Approach 1:
The control system performs automatic self-adjustment by acquiring its own operational data, comparing it with target values, and modifying the target profile without external intervention. This self-service capability simplifies the overall system architecture by eliminating the need for separate manual adjustment mechanisms while maintaining high topography accuracy
Data Source
AI summary
A controller for a work machine acquires current topography data indicating a current topography to be worked. The controller determines a target design topography based on the current topography. The target design topography indicates a target trajectory of a work implement. The controller generates a command signal to operate the work implement to excavate the current topography according to the target design topography. The controller acquires excavated topography data indicating a current topography that has been excavated. The controller modifies the target design topography to move the target design topography upwardly based on the excavated current topography.