Results 61 to 70 of about 3,604 (206)

Local particle refinement in terramechanical simulations

Journal of Terramechanics
The discrete element method (DEM) is a powerful tool for simulating granular soils, but its high computational demand often results in extended simulation times. While the effect of particle size has been extensively studied, the potential benefits of spatially scaling particle sizes are less explored.
Markus Pogulis, Martin Servin
openaire   +3 more sources

A Study Demonstrating That Using Gravitational Offset to Prepare Extraterrestrial Mobility Missions Is Misleading

Journal of Field Robotics, Volume 42, Issue 7, Page 3772-3794, October 2025.
ABSTRACT Recently, there has been a surge of international interest in extraterrestrial exploration targeting the Moon, Mars, the moons of Mars, and various asteroids. This contribution discusses how current state‐of‐the‐art Earth‐based testing for designing rovers and landers for these missions currently leads to overly optimistic conclusions about ...
Wei Hu, Pei Li, Arno Rogg, Alexander Schepelmann, Samuel Chandler, Ken Kamrin, Dan Negrut   +6 more
wiley   +1 more source

Mapped material point method for large deformation problems with sharp gradients and its application to soil‐structure interactions

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 48, Issue 9, Page 2334-2355, 25 June 2024.
Abstract The material point method (MPM) is often applied to large deformation problems that involve sharp gradients in the solution field. Representative examples in geomechanics are interactions between soils and various “structures” such as foundations, penetrometers, and machines, where the displacement fields exhibit sharp gradients around the ...
Yidong Zhao, Minchen Li, Chenfanfu Jiang, Jinhyun Choo   +3 more
wiley   +1 more source

Soil Spectral Behavior Related to Its Load-Bearing Capacity Based on Moisture Content

Applied Sciences, 2023
Soil’s load-bearing capacity is a crucial property from which the ability of soil to resist the vertical deformation resulting from a normal load can be determined, and this property is essential for analyzing a vehicle’s performance over soil terrain in
Ahmed Elawad Eltayeb Ahmed, Alaa El Hariri, Péter Kiss   +2 more
doaj   +1 more source

Grassland Plant Composition Alters Vehicular Disturbance Effects in Kansas, USA [PDF]

, 2008
Many ‘‘natural’’ areas are exposed to military or recreational off-road vehicles. The interactive effects of different types of vehicular disturbance on vegetation have rarely been examined, and it has been proposed that some vegetation types are less ...
Busby, Ryan, Dickson, Timothy, Gebhart, Dick, Wilsey, Brian, Wilsey, Brian   +4 more
core   +3 more sources

Calibration of an expeditious terramechanics model using a higher‐fidelity model, Bayesian inference, and a virtual bevameter test

Journal of Field Robotics, Volume 41, Issue 3, Page 550-569, May 2024.
Abstract The soil contact model (SCM) is widely used in practice for off‐road wheeled vehicle mobility studies when simulation speed is important and highly accurate results are not a main concern. In practice, the SCM parameters are obtained via a bevameter test, which requires a complex apparatus and experimental procedure.
Wei Hu, Pei Li, Huzaifa Mustafa Unjhawala, Radu Serban, Dan Negrut   +4 more
wiley   +1 more source

Formation of a mathematical model of the dynamic loading of tractor suspension with semi-trailer [PDF]

, 2019
Наведено математичну модель поздовжньо-кутового руху машинно-тракторного агрегату на базі колісного трактора та напівпричіпного агрегату. Модель дозволяє враховувати нелінійні зміни пружних та дисипативних характеристик підвіски, пневматичних елементів ...
Кожушко, Андрій Павлович, Мамонтов, Анатолій Геннадійович, Ребров, Олексій Юрійович   +2 more
core   +1 more source

In situ skid estimation for mobile robots in outdoor environments

Journal of Field Robotics, Volume 41, Issue 1, Page 179-194, January 2024.
Abstract Skidding is a surface hazard for mobile robots' navigation and traction control systems when operating in outdoor environments and uneven terrains due to the wheel–terrain interaction. It could lead to large trajectory tracking errors, losing the robot's controllability, and mission failure occurring.
Payam Nourizadeh, Fiona J. Stevens McFadden, Will N. Browne   +2 more
wiley   +1 more source

Estimation of resistance force at steady-state sinkage for cylindrical wheel-typed lunar/planetary exploration rovers with function of push–pull locomotion

ROBOMECH Journal, 2020
Planetary exploration rovers have required a high traveling performance to overcome obstacles such as loose soil and rocks. Push-pull locomotion rovers is a unique scheme, like an inchworm, and it has high traveling performance on loose soil.
Daisuke Fujiwara, Naoki Tsujikawa, Tetsuya Oshima, Kojiro Iizuka   +3 more
doaj   +1 more source

Rutting Caused by Grouser Wheel of Planetary Rover in Single-Wheel Testbed: LiDAR Topographic Scanning and Analysis

Aerospace
This paper presents datasets and analyses of 3D LiDAR scans capturing the rutting behavior of a rover wheel in a single-wheel terramechanics testbed.
Keisuke Takehana, Vinicius Emanoel Ares, Shreya Santra, Kentaro Uno, Eric Rohmer, Kazuya Yoshida   +5 more
doaj   +1 more source