Autonomous Harvester Speed Control via Engine and Header Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Operating a harvester efficiently is challenging due to the need to manage multiple variables such as engine speed, header speed, and terrain conditions, requiring a human operator to balance various parameters for optimal harvesting efficiency.
Innovation Solution
A control system that autonomously adjusts the ground speed of a harvester based on engine speed and header speed, using sensors and actuators to maintain optimal operation by setting maximum and lower limits, and adjusting speeds accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If autonomous control system is implemented to manage engine speed, header speed, and ground speed, then harvesting efficiency is improved and operator fatigue is reduced, but device complexity increases due to additional sensors, actuators, and control electronics
Solution Approach 1:
The control system is segmented into distinct functional modules: ground speed control module, engine speed control module, and header speed control module. Each module independently manages specific parameters, allowing the complex control function to be divided into manageable components that can be developed, tested, and maintained separately while working together to achieve optimal harvesting efficiency.
Solution Approach 2:
The controller is designed as a multi-functional device that simultaneously manages ground speed, engine speed, and header speed control. This universal controller integrates multiple control functions into a single system, reducing the need for separate control units and thereby managing device complexity while achieving comprehensive autonomous control for improved productivity.
2Reliability
If multiple control parameters (engine speed, header speed, ground speed) are managed autonomously, then operational safety is improved and operator fatigue is reduced, but ease of operation is worsened due to reduced direct operator control
Solution Approach 1:
The control system continuously monitors actual speeds of the header, engine, and harvester against target speeds and automatically adjusts parameters to maintain optimal operation. This closed-loop feedback control ensures operational safety by preventing unsafe conditions while maintaining ease of operation through automatic adjustments rather than requiring constant manual intervention.
Solution Approach 2:
The control system performs self-adjustment of ground speed, engine speed, and header speed based on pre-set parameters and real-time sensor data. The system serves itself by automatically correcting deviations from optimal operating conditions, thereby improving safety through consistent parameter management while reducing operator burden and fatigue.
3Productivity
If ground speed is increased to improve productivity, then harvesting output is improved, but header speed may become insufficient leading to poor harvesting quality
Solution Approach 1:
The control system dynamically adjusts ground speed, engine speed, and header speed based on real-time operating conditions and pre-set relationships. When ground speed increases to improve productivity, the system automatically coordinates increases in engine speed and header speed to maintain the proper speed ratios, ensuring harvesting quality is preserved while achieving higher output.
Solution Approach 2:
The system changes multiple operating parameters simultaneously - ground speed, engine speed, and header speed - in coordinated fashion. By changing these parameters together rather than independently, the system maintains the optimal speed relationships required for high-quality harvesting while achieving increased productivity through overall speed increases.
Data Source
AI summary
A method of autonomously controlling the ground speed of a harvester, such as a self-propelled or towed wind rower, uses both the engine speed and the header speed as control parameters to increase or decrease the ground speed as necessary to maintain efficient harvester operation over varying terrain and crop conditions. A control system includes a controller which receives signals from sensors indicative of engine speed, header speed and harvester ground speed and uses actuators to control the header speed, engine speed and harvester ground speed. An operator interface permits an operator to engage or disengage the autonomous mode of control system operation, as well as to directly control the harvester.