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Kites in Agrarian Regions
Published in K. R. Krishna, Aerial Robotics in Agriculture, 2021
Kites have been made using several different types of materials. A few commonly adopted materials are plastic sheets, cloth and paper. Textile material such as ripstop nylon, polyester, Dacron and silks are the frequently preferred materials, to make kites of different sizes.
Development of simplified air drag models including crosswinds for commercial heavy vehicle combinations
Published in Vehicle System Dynamics, 2023
M. Askerdal, J. Fredriksson, L. Laine
It is well known that the environment is impacting vehicle energy consumption a lot. Road surface type (e.g. asphalt, concrete, dirt), roughness and conditions (e.g. dry, humid, wet) interact with the ambient conditions (e.g. temperature, precipitation) and the tires to form rolling resistance, [5,6] and weather factors like ambient temperature, wind, and ambient pressure have an effect on air drag [7]. Crosswinds may also cause energy losses from lateral forces in the form of cornering resistance [8]. Furthermore, [9] discusses the aerodynamic properties of wings and how they can be used to harvest wind energy. It relates the power generation to the total aerodynamic force of the wing, the wind speed, and the angle between the aerodynamic force and the wind and it mentions that wind can generate up to 2 MW from a single kite system. With that said, wind is a powerful force, and it needs to be taken into account when doing vehicle range estimation.
Spectral simulation and method design of camouflage textiles for concealment of hyperspectral imaging in UV-Vis-IR against multidimensional combat background
Published in The Journal of The Textile Institute, 2023
In Figure 5(i, j), the OB environment of sky was simulated for sky background camouflage textiles. For assessments of sky camouflage textiles, a simultaneous process of laboratory and field trials should be conducted. In laboratory scale assessment, the sky color in different environment can be photographed by hyperspectral camera. The SL and imaging signal may be the data information for designing such camouflage textiles. Refractive index of sky background was partially considered for this simulation and discussion. Photographic color can be assessed by imaging and color measurement, and chromatic group can be assessed by SL. For field trialling, aircraft/parachute/artificial kite can be used for placing camouflage textiles as a target object. Figure 5(i, j) shows the simulation of sky background. The SL-R technique has been implemented for assessment of sky background camouflage textiles. Similarly, the spectral vibration can be evaluated for CDRI of sky camouflage textiles.
Low-cost and high-performance visual guidance and navigation system for space debris removal
Published in Advanced Robotics, 2021
Shinichi Kimura, Eijiro Atarashi, Taro Kashiwayanagi, Kohei Fujimoto, Ryan Proffitt
These units are interconnected using a high-speed serial interface that was space-qualified during the Kounotori Integrated Tether Experiment (KITE) mission (Figure 2) [5]. Therefore, a full-frame image can be transmitted using a pair of harnesses. The interconnection between the camera heads and the processing unit can be extended up to 1 m in length. Thus, the camera head units can be conveniently equipped.