Work Vehicle Control System for Terrain Finish Quality
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Solution Overview
Problem
Conventional control systems for work vehicles, such as bulldozers, struggle to maintain efficient and smooth digging operations in terrains with large undulations, leading to uneven terrain and poor finish quality due to sudden blade elevation caused by increased load.
Innovation Solution
A control system that acquires current terrain data and generates command signals to move the work implement towards a target design terrain, adjusting for vertical displacement based on movement and load parameters to maintain optimal blade position and load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If load control raises the blade when load becomes excessively high, then track slippage is suppressed and work efficiency is improved, but the terrain finish quality deteriorates due to sudden blade elevation and uneven terrain formation
Solution Approach 1:
The control system performs preliminary action by gradually increasing the target displacement of the work implement from the current terrain in the vertical direction according to the amount of movement from the work start position. This gradual adjustment prevents sudden blade elevation that would cause uneven terrain, while still achieving the necessary load reduction to prevent track slippage. The system proactively manages the transition from high load to optimal load conditions.
Solution Approach 2:
The invention applies dynamics by making the target displacement dynamic rather than fixed. The target displacement changes gradually based on the amount of movement from the work start position, allowing the blade to adjust smoothly to varying terrain conditions. This dynamic adjustment maintains optimal blade contact with the terrain while adapting to load changes, preventing both track slippage and terrain damage.
2Manufacturing precision
If the blade conforms to the design terrain initially, then good terrain finish is achieved, but track slippage occurs when load on the blade becomes excessively high
Solution Approach 1:
The control system performs preliminary action by gradually increasing the target displacement of the work implement from the current terrain in the vertical direction according to the amount of movement from the work start position. This gradual adjustment prevents sudden blade elevation that would cause uneven terrain, while still achieving the necessary load reduction to prevent track slippage. The system proactively manages the transition from high load to optimal load conditions.
Solution Approach 2:
The invention implements feedback by continuously monitoring the load on the work implement and adjusting the target displacement accordingly. The control system uses the amount of movement from the work start position as a feedback parameter to dynamically adjust the vertical displacement, ensuring that the blade maintains optimal contact with the terrain while preventing excessive load that would cause track slippage.
Data Source
AI summary
A control system includes a controller. The controller acquires current terrain data that indicates the current terrain to be worked. The controller decides on a target design terrain that is displaced vertically from the current terrain by referring to target displacement data. The target displacement data indicates the target displacement of a work implement according to the amount of movement from a work start position. The controller generates a command signal to move the work implement toward the target design terrain.