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Title: An automatic depth control system for online measurement of spatial variation in soil compaction, Part 4: Improvement of compaction maps by using a proportional integrative derivative depth controller
Authors: Mouazen, Abdul Mounem ×
Anthonis, Jan
Ramon, Herman #
Issue Date: Apr-2005
Publisher: Academic press inc elsevier science
Series Title: Biosystems engineering vol:90 issue:4 pages:409-418
Abstract: The spatial variation in soil compaction is inaccurately measured online (on-the-go, tractor-based continuous measurement) if the measured depth d is not controlled at minimum variations. A depth control system is needed for controlling the depth of the subsoiler used as a tool for online measurement of soil compaction indicated as dry bulk density rho(d). A proportional integrative derivative (PID) controller with a filter on the derivative-action that provided the best results in a previous part of this study was implemented. For continuous interpolation of online measured dry bulk density and sensor depth, kriging was performed with Variogram Estimation and Spatial Prediction with ERror (VESPER 1(.)6) software to develop maps with irregular grid of 0(.)3 in by 10 in. The VESPER 1(.)6 software was also used to generate the field maps of dry bulk density with 10 in by 10 in grid. To verify the online measured dry bulk density maps, the 10 in by 10 in online measured dry bulk density maps were compared with maps measured by the conventional core sampler method.
URI: 
ISSN: 1537-5110
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

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