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Frequency Spectra Analysis of Drawbar Pulls Generated by Special Driving Wheels Improving Tractive Performance
Rudolf Abrahám1, Radoslav Majdan1, Katarína Kollárová2
1Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia.
Sensors (Basel, Switzerland)
|April 30, 2021
Summary
This study analyzed tractor drawbar pull vibrations to evaluate special driving wheels. Blade wheels showed the highest drawbar power and distinct frequencies, outperforming standard tires and spike tires.
Area of Science:
- Agricultural Engineering
- Mechanical Engineering
- Vibration Analysis
Background:
- Tractor driving wheel operation generates vibrations due to ground force interactions.
- Analyzing these vibrations in the frequency spectrum of drawbar pull offers insights into wheel performance.
- Specialized driving wheel designs aim to improve traction and power transfer compared to standard tires.
Purpose of the Study:
- To analyze the drawbar pull signal frequency spectra of tractors using standard tires, spike tires, and blade wheels.
- To evaluate the performance characteristics of special driving wheels based on drawbar power and vibration frequencies.
- To compare experimental frequency spectra with model spectrum intervals derived from wheel lug/blade/spike configurations.
Main Methods:
- Measurement and analysis of drawbar pull signals from tractors equipped with different driving wheels.
- Application of Fast Fourier Transformation (FFT) for frequency spectrum analysis.
- Calculation and comparison of model spectrum intervals based on the number of lugs, blades, or spikes against experimental data.
Main Results:
- Specific frequencies characteristic of blade and spike wheels were identified in the model spectrum intervals.
- Standard tires did not exhibit identifiable spectrum components related to their tread pattern lugs.
- Blade wheels demonstrated the highest amplitude of characteristic frequencies and the greatest increase in drawbar power compared to standard tires.
- Spike tires with smaller dimensions showed lower amplitude frequencies and a smaller difference in drawbar power.
Conclusions:
- Blade wheels offer superior drawbar power and distinct vibrational signatures compared to standard and spike tires.
- The frequency spectrum analysis is a viable method for characterizing driving wheel performance.
- Tire tread design significantly influences vibrational characteristics and drawbar power output.
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