Work Vehicle Travel Control with Slip-Based Acceleration Limits
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Solution Overview
Problem
Existing travel control systems for work vehicles fail to adapt to varying road conditions, leading to potential slipping and route deviation, especially on steep or slippery surfaces, due to a fixed acceleration upper limit value.
Innovation Solution
A travel control method that dynamically adjusts the acceleration upper limit value based on the slip condition of the work vehicle to prevent slipping during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed acceleration upper limit value is used, then the control system is simple, but the vehicle slips on steep or slippery road surfaces
Solution Approach 1:
The acceleration upper limit value is changed from a fixed parameter to a dynamic parameter that varies based on detected slip conditions. The control system continuously monitors acceleration and compares it against the stored upper limit value, adjusting control actions based on the detected slip state to prevent vehicle instability.
Solution Approach 2:
The system implements feedback control by detecting actual acceleration, comparing it with the acceleration upper limit value, and using this information to determine slip conditions. This feedback loop enables the system to adaptively adjust control actions to maintain vehicle stability on varying road surfaces.
2Productivity
If rapid acceleration is applied, then productivity increases, but the crawler slips and causes route deviation
Solution Approach 1:
The system changes the acceleration parameter dynamically based on detected slip conditions. When slip is detected, the acceleration upper limit value is adjusted to prevent further slipping, thereby maintaining route accuracy. When no slip is detected, higher acceleration values can be used to improve productivity.
Data Source
AI summary
A travel control method for a work vehicle includes: acquiring a slip condition related to a slip that occurs during travel of the work vehicle; and changing an acceleration upper limit value that is an upper limit value of acceleration until a vehicle speed of the work vehicle reaches a target speed.