Work Machine Controller Excavation Depth Adjustment
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Solution Overview
Problem
Automatic control systems for work machines face efficiency decreases due to factors like soil hardness, causing uneven terrain and reduced work efficiency during excavation.
Innovation Solution
A controller acquires the position of the excavation end, target soil amount, and excavation distance to determine the target excavation depth for each pass, adjusts based on actual soil amount, and modifies the target soil amount and depth for subsequent passes to maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the work implement follows the preset target profile strictly, then the automation extent is improved, but the manufacturing precision deteriorates due to terrain deviations caused by soil hardness
Solution Approach 1:
The system measures the actual excavation depth using a depth sensor and compares it with the target excavation depth. Based on the depth deviation detected, the controller automatically adjusts the work implement's depth command to compensate for terrain variations caused by soil hardness, maintaining precision while preserving automatic control operation.
Solution Approach 2:
The target excavation depth is made dynamically adjustable rather than fixed. The controller modifies the depth parameter in real-time based on feedback from the depth sensor, allowing the system to adapt to changing soil conditions while maintaining automated operation.
2Productivity
If the work implement continues excavation without adjustment, then the productivity is maintained, but the manufacturing precision deteriorates due to unevenness creation
Solution Approach 1:
The depth sensor continuously monitors excavation depth and provides feedback to the controller. When deviations are detected, the system automatically adjusts the work implement depth to correct unevenness, maintaining both productivity and terrain precision without requiring work interruption.
3Productivity
If the target excavation depth is increased to compensate for soil hardness, then the productivity is improved, but the manufacturing precision deteriorates due to excessive depth variation
Solution Approach 1:
Rather than preemptively increasing depth to compensate for soil hardness, the system uses real-time depth sensor feedback to make precise, incremental adjustments. This maintains depth consistency while achieving effective excavation through controlled, measured corrections rather than excessive depth variation.
Data Source
AI summary
A controller is configured to determine a target excavation depth of a first pass based on a position of an excavation end, a target soil amount, and an excavation distance. The controller is configured to move a work implement to the target excavation depth of the first pass to execute an excavation of the first pass. The controller is configured to acquire an actual soil amount excavated in the first pass. The controller is configured to modify the target soil amount based on the actual soil amount. The controller is configured to determine the target excavation depth of a second pass based on the modified target soil amount. The controller is configured to move the work implement to the target excavation depth of the second pass to execute the excavation of the second pass.