Work Vehicle Control System for Uneven Terrain Load Management
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Solution Overview
Problem
Conventional control systems for work vehicles face challenges in maintaining efficient and high-quality performance, particularly in uneven topography, where excessive load on the blade leads to rough excavation and poor finish quality during digging and filling operations.
Innovation Solution
A control system for work vehicles that includes a display, input device, and controller, allowing operators to input reference positions to determine a target design surface, enabling precise control of the work implement's trajectory and load management to prevent excessive load and improve finish quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blade is controlled along the final design surface and load control is applied when load becomes excessive, then shoe slip can be suppressed, but the blade may ascend rapidly on large uneven topography causing rough excavation and degraded finish quality
Solution Approach 1:
The patent segments the design surface into multiple sections along the travel direction, allowing different control strategies for different sections. The blade trajectory is divided into a first trajectory (initial section) and a second trajectory (subsequent sections), enabling differentiated control to prevent both shoe slip and rapid blade ascent.
Solution Approach 2:
The control system dynamically adjusts the blade trajectory based on the section of the design surface. The trajectory is not fixed but adapts according to the current working section, allowing the blade to follow appropriate paths that prevent excessive load while maintaining finish quality.
2Productivity
If ground leveling control is applied to move the blade tip along the final design surface, then automatic control efficiency is improved, but large amounts of soil accumulate in front of the work vehicle on large uneven topography making compaction difficult
Solution Approach 1:
The patent applies segmentation to the design surface by dividing it into multiple sections, enabling the control system to implement different filling strategies for different sections. This prevents excessive soil accumulation in any single location while maintaining automatic control efficiency.
Solution Approach 2:
The control system regulates the blade position to prevent excessive filling action in any one location. By controlling the blade trajectory through section-based management, the system avoids accumulating large amounts of soil that would be difficult to compact, while still achieving efficient automatic filling operation.
Data Source
AI summary
A control system for the work vehicle includes a display, an input device, and a controller. The controller displays a current position of a work vehicle on a screen of a display. The controller receives a first input signal indicating an input operation by an operator from a input device. The controller determines, as a first position, the position of the work vehicle when the first input signal is received. The controller displays the first position on the screen of the display. The controller receives a second input signal indicating an input operation by an operator from the input device. The controller determines, as the second position, the position of the work vehicle when the second input signal is received. The controller determines a target design surface indicating a target trajectory of a work implement based on reference position information including at least the first position and the second position.