Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Brian L. Steward"'
Publikováno v:
Transactions of the ASABE. 64:1693-1704
HighlightsA mathematical model of soil reaction forces on a rotary tine tool was developed.Soil bin experiments using artificial soil enabled observation of soil failure due to soil-tine interaction.The model-predicted forces were similar to experime
Publikováno v:
Transactions of the ASABE. 64:2025-2034
HighlightsSimulation of uniaxial compression was performed with flexible fibers modeled in DEM.Bond-specific DEM parameters were found to be sensitive in uniaxial compression.A calibration technique that is not plunger-dependent is shown and validate
Publikováno v:
Transactions of the ASABE. 64:243-252
HighlightsDielectric permittivities of switchgrass and corn stover in the radio frequency range were calculated.Prediction models achieved R2 > 0.9, except for the switchgrass loss factor for the material in motion.The loss factors were different whe
Publikováno v:
Journal of Field Robotics. 37:35-52
Publikováno v:
Transactions of the ASABE. 62:1283-1291
Mechanical weeding augmented with automation technology should result in highly effective weeding systems. However, the interaction between weeding mechanisms and soil is not well understood. Moreover, soil is highly variable, which makes studying th
Autor:
Kenneth O. M. Mapoka, Stuart J. Birrell, Brian L. Steward, David J. Eisenmann, Mehari Z. Tekeste
Publikováno v:
Transactions of the ASABE. 62:673-686
Planting depth (PD) plays an essential role in crop production by substantially impacting germination rates and yield potential. However, techniques to measure PD nondestructively have not been developed. A two-dimensional gprMax simulation study was
Publikováno v:
Applied Engineering in Agriculture. 35:697-704
Agricultural spray drift is affected by many factors including current weather conditions, topography of the surrounding area, fluid properties at the nozzle, and the height at which the spray is released. During the late spring/summer spray seasons
Autor:
Eric R. Anderson, Brian L. Steward
Publikováno v:
Journal of Dynamic Systems, Measurement, and Control. 143
Hydraulic pressure ripple in a pump, as a result of converting rotational power to fluid power, continues to be a problem faced when developing hydraulic systems due to the resulting noise generated. In this paper, we present simulation results from
Publikováno v:
2021 ASABE Annual International Virtual Meeting, July 12-16, 2021.
Compared to traditional lectures many people in technical fields learn and retain information more effectively while exploring new content hands-on, working with physical components connecting them together, observing their operation, and taking phys
Publikováno v:
2021 ASABE Annual International Virtual Meeting, July 12-16, 2021.
Iowa State University has been awarded two grants focused on professional development and education. The grants are part of the U.S. Department of State and the American Councils for International Education programming for the UniCEN platform. UniCEN