Results 11 to 20 of about 1,201 (151)

MARCEL: Mobile active rover chassis for enhanced locomotion

Journal of Field Robotics, Volume 40, Issue 6, Page 1504-1524, September 2023., 2023
Abstract To extend planetary exploration beyond the current limitations of wheeled vehicles while preserving reliability, simplicity, and efficiency, actuation can be judiciously incorporated into the locomotion system. Based on a static analysis, we propose a new four‐wheeled chassis concept for planetary rovers that can traverse more challenging ...
Arthur Bouton, Yang Gao
wiley   +1 more source

Ship waves in rivers: Environmental criteria and analysis methods for measurements

River Research and Applications, Volume 39, Issue 4, Page 629-647, May 2023., 2023
Abstract A literature review shows that the most important physical quantities determining environmental impact of ship waves in a waterway are the fluid velocities, maximum and minimum water levels, and size of drawdown events. Fluid velocity can vary strongly in the vertical so that the usual measurements at a single point are not enough unless made ...
John D. Fenton, Boris Huber, Gerhard Klasz, Norbert Krouzecky   +3 more
wiley   +1 more source

Numerical Prediction of Hydrodynamic Performance of Planing Trimaran with a Wave-Piercing Bow

Journal of Marine Science and Engineering, 2020
The central hull is the most important structure in the planing trimaran. In order to gain insight into the relationship between hydrodynamic performance and main hull shape, experimental tests and numerical simulations were carried out for volume Froude
Guangsheng Su, Hailong Shen, Yumin Su
doaj   +1 more source

Improving safety of runway overrun through the correct numerical evaluation of rutting in Cleared and Graded Areas [PDF]

, 2014
Aircraft overrun is potentially very dangerous to human life. Statistics show that overrun is mainly due to human errors causing loss of control in wheel alignment, high approach speed, and long touchdown.
Benedetto, Andrea, D'Amico, Fabrizio, Tosti, Fabio   +2 more
core   +1 more source

Numerical Study of the Effect of Angle and Location of the First and Second Steps on the Performance of Planing Hull and Their Optimization Using the Taguchi Statistical Method

Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023
Providing steps at the bottom of a high‐speed craft could decrease the resistance and enhance the longitudinal stability by dividing a single pressure hump into several ones and extending the hydrodynamic pressure towards aft of the vessel. In the present paper, the effects of the fore and aft steps’ locations and angles on double‐stepped hulls are ...
Parviz Ghadimi, Sayyed Mahdi Sajedi, Mohammad Sheikholeslami, Aliakbar Ghadimi, Jie Hu   +4 more
wiley   +1 more source

Modeling Soil Pressure-Sinkage Characteristic as Affected by Sinkage rate using Deep Learning Optimized by Grey Wolf Algorithm [PDF]

Journal of Agricultural Machinery
Due to the numerous variables that may influence the soil-machine interaction systems, predicting the mechanical response of soil interacting with off-road traction equipment is challenging.
B. Golanbari, A. Mardani, A. Hosainpour, H. Taghavifar   +3 more
doaj   +1 more source

Reasonable stopping method and retracement channel support at fully mechanized top coal caving working face of 15 m extra‐thick coal seam: A case study

Energy Science &Engineering, Volume 10, Issue 12, Page 4336-4357, December 2022., 2022
The reasonable stopping top coal caving distance, main roof's fracture line position, and large section roadway during the stopping period (LSRSP) support method of the header face of 15 m extra‐thick coal seam are systematically studied by using field measurement, experiment, numerical simulation, and similar material simulation methods Abstract Extra‐
Shengrong Xie, Yiyi Wu, Xiang Ma, Dongdong Chen, Fangfang Guo, Zaisheng Jiang, Hui Li, Hang Zou, Ruipeng Liu, Xiao Zhang   +9 more
wiley   +1 more source

Evaluating the Effect of Soil Deformation Rate on the Estimation of the Energy Consumption in Soil-Tire Interactions Using the Pressure-Sinkage Equation [PDF]

Journal of Agricultural Machinery
Understanding soil deformation dynamics is critical in various fields, such as off-road vehicle mobility, agriculture, and soil mechanics. In particular, evaluating soil-tire interactions is essential for optimizing energy consumption and minimizing the ...
H. Asadollahi, B. Mohammadi-Alasti, A. Mardani, M. Abbasgholipour   +3 more
doaj   +1 more source

ClearDepth: a simple, robust, and low-cost method to assess root depth in soil. [PDF]

Plant J
SUMMARY Root depth is a major determinant of plant performance during drought and a key trait for strategies to improve soil carbon sequestration to mitigate climate change. While the model Arabidopsis thaliana offers numerous advantages for studies of root system architecture and root depth, its small and fragile roots severely limit the use of the ...
Ruiz Rosquete M, Gonzalez J, Wertz K, Gonzalez N, Baez M, Wang L, Zhang L, Patil S, Funaro L, Busch W.   +9 more
europepmc   +2 more sources

PENENTUAN PARAMETER DESAIN RODA BESI BERSIRIP MELALUI PENGUKURAN TAHANAN PENETRASI TANAH DI SAWAH (Determining Parameters of Lug Wheels Design by Measurement of Soil Penetration Resistance in Paddy Field)

Agritech, 2015
The objective of this study was to predict the design parameters of lugged wheel that fit through the soil penetration resistance measurement directly in paddy fields.
Taufik Rizaldi, Wawan Hermawan, Tineke Mandang, Setyo Pertiwi   +3 more
doaj   +1 more source