Forage Harvester Unloading Device Steering Compensation
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Solution Overview
Problem
Existing harvesting systems face challenges in maintaining a precise point of impact for crop transfer from a forage harvester to a transport vehicle, especially due to steering movements and varying ground conditions, which require complex manual adjustments by the operator.
Innovation Solution
A harvesting system with an actuator-controlled, axis-adjustable transfer device that automatically sets a compensation angle based on the forage harvester's steering angle and additional parameters like soil condition and driving speed, using sensors and manual input to refine the control and maintain the impact point on the transport vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of the unloading device is used to maintain the impact point on the transport wagon, then the operator can respond to steering movements, but the adjustment process becomes time-consuming and complex
Solution Approach 1:
The system automatically adjusts the unloading device based on steering angle sensor input and soil condition detection, eliminating the need for manual operator intervention. The control unit processes sensor data and autonomously actuates the unloading device to maintain the impact point on the transport wagon, making the system self-regulating without continuous human input.
Solution Approach 2:
The system incorporates steering angle sensors that continuously monitor the forage harvester's steering movements and feed this information to the control unit. The control unit processes this feedback along with soil condition data to automatically adjust the unloading device position, creating a closed-loop control system that responds dynamically to changing conditions.
2Productivity
If the unloading device is positioned to achieve central impact point, then crop transfer efficiency is maximized, but steering movements cause the impact point to shift requiring active adjustment
Solution Approach 1:
The system proactively adjusts the unloading device position in anticipation of impact point shifts caused by steering movements. By detecting steering angle changes and soil conditions beforehand, the control unit pre-adjusts the unloading device to compensate for upcoming positional deviations, maintaining accurate crop transfer before the shift occurs.
Solution Approach 2:
The system dynamically changes the unloading device's angular position parameter in response to varying operating conditions. The control unit modifies the compensation angle based on steering angle input and detected soil conditions, allowing the unloading device to adapt its position to maintain central impact point despite changes in forage harvester orientation or ground surface characteristics.
3Loss of time
If automated control of the unloading device is implemented, then manual adjustment time is reduced, but the system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes steering angle sensor data, detects soil conditions, calculates the appropriate compensation angle, and actuates the unloading device. By consolidating these diverse functions into a single control unit, the system achieves automated operation without proportionally increasing overall system complexity.
Solution Approach 2:
The control unit acts as an intermediary between the steering angle sensors and the unloading device actuator. It receives raw sensor data, processes this information along with soil condition inputs, and generates appropriate control signals for the unloading device, simplifying the interface between sensing and actuation components while enabling intelligent automated adjustment.
4Device complexity
If only steering angle is considered for unloading device adjustment, then control is simplified, but accuracy is reduced due to unaccounted lateral dynamics from soil conditions
Solution Approach 1:
The system adapts its control behavior based on local soil conditions detected by sensors. Different soil conditions (wet, dry, uneven) trigger different compensation strategies and adjustment parameters. The control unit modifies the compensation angle calculation to account for specific local ground surface characteristics, ensuring accurate impact point positioning tailored to each local condition rather than using a universal adjustment rule.
Data Source
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AI summary
The present invention relates to a harvesting system (1) comprising a self-propelled forage harvester (2) and a transport wagon (4) pulled by a towing vehicle (3), which travel at least temporarily one behind the other during a harvesting operation, wherein, for the purpose of transferring harvested crop (6) picked up by the forage harvester (2) onto the rear transport wagon (4), an unloading device (8) adjustable about at least one axis (24) by a drive arrangement (21) is arranged on the forage harvester (2), which can be automatically controlled by a control device (17), wherein the setting of a compensation angle (β) between the unloading device (8) and the longitudinal axis (L) of the forage harvester (2) to maintain an impact point (15) in the transport wagon (4) is carried out as a function of a change in a steering angle (α) of the forage harvester (2),wherein the adjustment of the compensation angle (β) is carried out taking into account at least one additional parameter influencing the driving dynamics, which is provided to the control unit (17).