Work Vehicle Blade Control for Smooth Excavation on Undulating Terrain
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Solution Overview
Problem
Conventional control systems for work vehicles struggle to maintain efficient excavation with smooth 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 determine a first target design topography, generate command signals for the work implement based on this topography, and adjust the blade position to prevent excessive load, ensuring the blade follows a target design topography above the actual topography to maintain efficient and smooth excavation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade is controlled to follow the design topography and raised when load becomes excessive, then work efficiency is improved, but the finish quality deteriorates due to sudden blade movements in undulating terrain
Solution Approach 1:
The control system performs preliminary action by predicting future blade positions and loads based on the target design topography and current blade state. This allows the system to prepare appropriate control responses in advance, preventing sudden blade movements before they occur, thus maintaining both work efficiency and finish quality in undulating terrain
2Reliability
If the blade is raised quickly to prevent excessive load, then shoe slip is suppressed, but the terrain becomes rough and finish quality decreases
Solution Approach 1:
The control system applies dynamics by continuously and smoothly adjusting the blade position based on real-time load conditions and target topography. Rather than sudden discrete adjustments, the system dynamically modulates blade elevation to maintain optimal load levels, preventing shoe slip while ensuring smooth terrain finish through continuous adaptive control
3Productivity
If automatic control is implemented to maintain design topography, then work consistency is improved, but the system complexity increases
Solution Approach 1:
The control system implements feedback by continuously monitoring the actual blade position and load conditions, comparing them against the target design topography and desired load parameters. This closed-loop feedback mechanism automatically adjusts blade control to maintain consistent work quality while managing system complexity through standardized control algorithms and sensors
Data Source
AI summary
A work vehicle includes a work implement. A control system for the work vehicle includes an operating device and a controller. The operating device outputs an operation signal indicative of an operation by an operator. The controller communicates with the operating device and controls the work implement. The controller determines a first target design topography. The controller generates a command signal to operate a work implement in accordance with the first target design topography. The controller obtains a displacement amount of the work implement with respect to the first target design topography upon receiving the operation signal indicative of the operation of the work implement during work in accordance with the first target design topography. The controller determines a second target design topography based on the displacement amount. The controller generates a command signal to operate the work implement in accordance with the second target design topography.