Adaptive Mower Control via Motor Load and Deck Height Adjustment
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Solution Overview
Problem
Commercial mowers face inefficiencies due to operators' inability to adjust speed optimally across varying grass densities, leading to suboptimal cutting and potential mower damage.
Innovation Solution
A mower system with sensors monitoring motor loads and vertical movement, coupled with a control module that adjusts ground speed and cutting height to maintain optimal operational parameters based on real-time feedback, optimizing efficiency and reducing operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operator sets a fixed ground speed for the mower, then the operation is simple and easy to control, but the cutting efficiency is suboptimal when grass density varies across different sections
Solution Approach 1:
The mower system automatically monitors its own performance metrics (ground speed, cutting height, engine load) and adjusts operational parameters without external intervention. The control module continuously receives sensor data and autonomously optimizes cutting efficiency by adapting ground speed and deck height based on real-time conditions, eliminating the need for constant operator adjustment while maintaining peak productivity
Solution Approach 2:
The system implements closed-loop feedback by continuously monitoring operational parameters through sensors (ground speed sensors, cutting height sensors, engine load sensors) and using this information to dynamically adjust mower settings. The control module processes sensor data in real-time and automatically modifies ground speed and deck height to optimize cutting efficiency across varying grass densities, resolving the contradiction between simple operation and high productivity
2Productivity
If the mower operates at high ground speed to maximize productivity, then more area is covered per unit time, but cutting quality deteriorates and mower damage risk increases on dense or uneven terrain
Solution Approach 1:
The system dynamically adjusts ground speed based on real-time monitoring of cutting conditions, grass density, and mower performance metrics. Rather than maintaining a fixed high speed, the control module continuously modulates ground speed to match terrain and grass conditions, ensuring optimal cutting quality and reducing mechanical stress on mower components while maintaining high overall productivity across the mowing area
Solution Approach 2:
The system proactively prevents mower damage by monitoring operational parameters and detecting conditions that could lead to excessive stress or failure. Before damage can occur, the control module adjusts ground speed and cutting parameters to stay within safe operational limits, particularly when encountering dense grass or uneven terrain that would otherwise cause mechanical overload
3Manufacturing precision
If the operator manually adjusts cutting parameters for each section, then cutting quality is optimized, but labor costs and time consumption increase significantly
Solution Approach 1:
The mower system autonomously monitors and adjusts cutting parameters (ground speed, deck height, blade engagement) based on real-time sensor feedback without requiring operator intervention. The control module continuously optimizes cutting quality by adapting to varying grass densities and terrain conditions, eliminating the time-consuming manual adjustments while maintaining consistent high-quality cutting across all sections
Solution Approach 2:
The system implements real-time feedback control by continuously monitoring cutting quality metrics and automatically adjusting operational parameters. Sensors detect variations in grass density, cutting height, and mower performance, and the control module responds by dynamically modifying ground speed and deck settings to maintain optimal cutting quality, eliminating the need for manual operator adjustments and the associated time losses
Data Source
AI summary
A mower can be adaptively controlled to optimize efficiency based on loads experienced by motors that drive the cutting blades and/or based on vertical movement that a mower deck is experiencing. If the load is below a threshold, the ground speed of the mower can be increased. If the vertical movement or load exceeds a threshold, the ground speed can be reduced. The mower's performance can also be monitored to identify characteristics of an area being cut and then such characteristics can be used to further enhance the efficiency of the mower. A density map can be created based on monitored load, vertical movement and possibly other characteristics as a mower is cutting a particular area. The density map can be employed by any mower that is subsequently used to cut the same area.