viii
6-1-Summary and Conclusion .............................................................................................................. 124
6-2-Contributions .................................................................................................................................. 127
6-3-Future works ................................................................................................................................... 128
References:............................................................................................................................................... 131
APPENDIX A- Pictures of Developed Planter ..................................................................................... 135
APPENDIX B- Stress Analysis of the Disc Holder with Different Mesh Sizes .................................. 138
APPENDIX C- Matlab Code and Simulink Model for Low Pass Filter ............................................ 145
Appendix D- Comparison and Validation of the Experimental Soil Bin Results with Analytical
Analysis .................................................................................................................................................... 146
APPENDIX E- Detailed Drawings of the Designed Parts ................................................................... 149
ix
List of Tables
Table 2- 1- Constant parameters of the experiments .................................................................... 27
Table 2- 2- Variable parameters of the experiments ..................................................................... 27
Table 2- 3- Compaction Level of the soil in the soil bin .............................................................. 28
Table 2- 4- Experimental results ................................................................................................... 30
Table 3- 1- Dimensions of the gauge wheel and press wheel ....................................................... 59
Table 3- 2- Initial values for optimization problem ...................................................................... 63
Table 3- 3- Properties
of HD spring wire, for d>3 mm[21].......................................................... 69
Table 3- 4- Dimensions and properties of the main spring ........................................................... 71
Table 3- 5- Strength properties of the extension spring wire for d=6 mm.[21] ............................ 74
Table 3- 6- Dimensions and properties of the press wheel spring ................................................ 74
Table 4- 1- Components of external forces in the coordinate system
parallel to faces of depth
control link .................................................................................................................................... 79
Table 4- 2- Reaction forces at cylindrical supports A and B ........................................................ 83
Table 4- 3- Reaction forces and moments for disc holder ............................................................ 88
Table 4- 4- reactions of supports B and D of spring connection .................................................. 92
Table 5- 1- Average, minimum and maximum of the tests ........................................................ 120
Table B- 1-Number of nodes, element sizes and maximum real stress for different stress analyzes
of disc holder with different mesh sizes ..................................................................................... 139
Table D- 1- Experimental and analytical comparison for forces on disc plough for 7º disc angle
and 25º tilt angle ......................................................................................................................... 147
