Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Vahedifard, Farshid
Committee Member
DuBien, Janice
Committee Member
Goodin, Christopher
Committee Member
Howard, Isaac L.
Date of Degree
12-11-2015
Document Type
Graduate Thesis - Open Access
Major
Civil Engineering
Degree Name
Master of Science
College
James Worth Bagley College of Engineering
Department
Department of Civil and Environmental Engineering
Abstract
Soil moisture is a key variable in off-road mobility. Mobility analysis was conducted based on three soil moisture sources: WindSat (a satellite), LIS (a computer model), and in situ ground sensors (assumed to represent ground truth). Mobility of six vehicles, each with different ranges of sensitivity to soil moisture, was examined in three test sites. Two methods were used: a simplified method based on time series and a fulleatured terrain method. The results demonstrated that the effect of the soil moisture error on mobility predictions is complex and may produce very significant errors in mobility analysis for certain combinations of vehicles, seasons, and climates. Soil moisture biases vary in both direction and magnitude with season and location. Furthermore, vehicles are sensitive to different ranges of soil moistures. In the wet season, differences in soil strength resulted in more significant differences in mobility predictions than in the dry season.
URI
https://hdl.handle.net/11668/19562
Recommended Citation
Stevens, Maria T., "Use of Satellite Soil Moisture to Estimate Soil Strength and Ground Vehicle Mobility" (2015). Theses and Dissertations. 4874.
https://scholarsjunction.msstate.edu/td/4874