Harvester-Transport Vehicle Autoguidance for Precise Unload Alignment
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Solution Overview
Problem
Existing control systems for 'unload on the go' operations between harvesters and transport vehicles struggle to maintain accurate lateral and longitudinal positions, leading to crop material loss due to inadequate adjustment speed and initial alignment issues during abrupt harvester movements.
Innovation Solution
A vehicle-to-vehicle (V2V) autoguidance control system using GPS-based control systems with wireless communication between harvester and transport vehicle controllers to maintain desired lateral and longitudinal distances, enabling automated steering and synchronization of both vehicles to ensure precise alignment and minimize crop material loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a predetermined offset control system is used to determine lateral position, then the system is simple to implement, but unacceptable lateral distance deviations occur when the harvester changes position abruptly
Solution Approach 1:
The control system pre-calculates and stores optimal lateral offset values for different harvester speeds and operational conditions. When the harvester changes position, the system immediately retrieves the pre-computed offset value corresponding to the current speed, enabling rapid response without complex real-time calculations.
Solution Approach 2:
The lateral offset is made dynamic rather than fixed. The system continuously adjusts the offset value based on real-time harvester speed, transport vehicle response characteristics, and operational mode. This dynamic adjustment allows the control system to adapt to abrupt position changes while maintaining simplicity.
2Device complexity
If the control system provides only a destination point for the transport vehicle, then the initial alignment is simpler, but inaccurate initial alignment and delays occur
Solution Approach 1:
The system pre-calculates the optimal approach trajectory and lateral offset values before the transport vehicle reaches the harvester. By preparing the alignment parameters in advance based on predicted positions and speeds, the system eliminates delays during the actual alignment phase while keeping the control logic relatively simple.
Solution Approach 2:
The control system builds in a safety margin by pre-positioning the transport vehicle slightly ahead of the exact destination point and using progressive offset adjustments. This cushioning approach prevents overshooting and allows for smoother, faster alignment without requiring complex real-time corrections.
3Device complexity
If manual coordination is used to maintain relative distance, then the system is simpler, but crop material loss occurs due to inadequate adjustment speed
Solution Approach 1:
The control system continuously monitors the actual lateral and longitudinal distances between the harvester and transport vehicle, comparing them against desired values. Based on this feedback, the system automatically adjusts the transport vehicle's position and the lateral offset to maintain optimal alignment, preventing crop material loss even during rapid harvester movements.
Solution Approach 2:
The system automatically manages the coordination between harvester and transport vehicle without requiring manual intervention. It self-adjusts the lateral offset, destination point, and approach trajectory based on real-time conditions, enabling rapid response to position changes and preventing crop material loss that would occur with manual coordination.
Data Source
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Figure 3~4B
Figure 5A~5B
AI summary
A control system and method is provided for synchronized control of a harvester (10) and transport vehicle (20) during unload on the go operation. The control system can maintain a desired lateral distance (LAD) between the harvester (10) and transport vehicle (20) using swath information that is used to steer the harvester (10). In addition, the control system can also bring a transport vehicle (20) into appropriate alignment with the harvester (10) using the same swath information.