Predictive Torque Control for Agricultural Baler Power Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Agricultural power control systems, such as those used in hay balers, face challenges in coordinating engine power production with the anticipated torque requirements during cyclical operations, leading to inefficiencies and engine overshoot due to lagging power delivery.
Innovation Solution
A power control system that includes a predictive signal generating element and a torque modifying device, which anticipates the torque needed based on previous encounters with crop material, adjusting the power source's torque output in real-time to match the anticipated load, thereby synchronizing engine power with the cyclical demands of the baler.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the engine increases power output to compensate for increased load during plunger compression, then the power requirement is met, but the engine response lags and causes overshoot after load completion
Solution Approach 1:
The system performs preliminary action by detecting crop material presence in advance of the plunger compression cycle and pre-adjusting engine torque before the load increases. This anticipatory adjustment eliminates the lag between load detection and engine response, ensuring power is available exactly when needed without overshoot after compression completes.
2Speed
If rotating masses are added to the baler to reduce PTO speed reduction, then speed stability improves, but the timing coordination between power production and power need remains ineffective
Solution Approach 1:
The invention replaces the mechanical solution of adding rotating masses with an electronic control system that directly modulates engine torque. This substitution maintains PTO speed stability while achieving superior timing coordination through predictive crop material detection and real-time torque adjustment, eliminating the fundamental timing mismatch that mechanical inertia cannot resolve.
3Force
If the engine compensates for increased load by increasing power output, then the load requirement is satisfied, but fuel consumption increases due to overreaction and overshoot
Solution Approach 1:
The system implements feedback by continuously monitoring crop material detection signals and plunger cycle position, then adjusting engine torque in real-time based on actual load requirements. This closed-loop control prevents overreaction and overshoot by reducing torque once compression completes, optimizing fuel consumption while maintaining adequate torque delivery throughout the cycle.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An agricultural power control system 10 includes a moving element (30), a power source (20), a signal generating element (32) and a torque modifying device (24). The moving element (30) is configured to engage a quantity of crop material in a cyclical manner. The power source (20) conveys power to the moving element (30). The signal generating element (32) is configured to provide a signal relating to an anticipated quantity of crop material prior to the moving element (30) engaging the quantity of crop material. The torque modifying device (24) is configured to cause the power source (24) to alter an amount of torque delivered to the moving element (30) dependent upon the signal.