Modified Design of a Precision Planter For a Robotic Assistant Farmer
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AMINZADEH-THESIS
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- 2-5-1- Draft force
2-5- Test results and discussion:
Experiments were performed with zero tilt angle and several disc angles. The same thing was done with tilt angle of 15, 20 and 25 degrees. For each combination of disc and tilt angles, test was repeated 4 times. Table 2-4 shows the average readings of the load cells for each direction and the results for all experiments and compound angles. Since there are more than one load cell in the horizontal (draft) and vertical direction, the amount indicated in Table 2-4 are the summation of all the load cells in each direction. 30 Table 2- 4- Experimental results: Forces are average of 4 different tests for each set of angles Tilt Angle (Degrees) Disc Angle (Degrees ) Vertical Force (N) Lateral Force (N) Draft (N) 0 0 110 2.00 72.0 7 123 215 108 14 118 231 148 21 132 555 176 28 135 1180 230 15 0 102 25.0 83.0 7 65.0 265 122 14 52.0 432 143 21 54.0 760 151 28 60.0 534 176 20 0 93.0 24.0 85.0 7 110 193 116 14 93.0 810 132 21 90.0 630 143 28 102 432 148 25 0 89.0 32.0 102 7 84.0 760 97.0 14 112 537 106 21 110 440 130 28 97.0 463 121 2-5-1- Draft force: For the purpose of the design of the planter and energy consumption, we can tell that draft force is the most important parameter during the motion of disc. Figure 2-8, 2-9, 2-10 and 2-11 show the draft force of the disc with the tilt angle of 0, 15, 20 and 25 degrees, respectively, for different disc angles. Also Figure 2-12 shows all of them together for a comparative analysis. 31 Figure 2- 8- Draft force on the disc coulter for different disc angles, tilt angle=0 Figure 2- 9- Draft force on the disc coulter for different disc angles, tilt angle=15 Figure 2- 10- Draft force on the disc coulter for different disc angles, tilt angle=20 0 50 100 150 200 250 0 7 14 21 28 Download 6.98 Mb. Do'stlaringiz bilan baham: |
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