Results 1 to 10 of about 795 (205)
APBench and benchmarking large language model performance in fundamental astrodynamics problems for space engineering [PDF]
Scientific ReportsThe problem-solving abilities of Large Language Models (LLMs) have become a major focus of research across various STEM fields, including mathematics and physics. Substantial progress has been made in both measuring and enhancing these abilities.
Di Wu +4 more
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Applied Nonsingular Astrodynamics [PDF]
, 2018 This essential book describes the mathematical formulations and subsequent computer simulations required to accurately project the trajectory of spacecraft and rockets in space, using the formalism of optimal control for minimum-time transfer in general elliptic orbit.
Jean Albert Kéchichian
openaire +2 more sources
, 2015 One of the most important uses of vector analysis (cf. Appendix A) is in the concise formulation of physical laws and the derivation of other results from these laws. We will develop and use the differential equations of motion for a body moving under the influence of a gravitational force only. In Chap.
K. F. Wakker
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Development of a Hardware-in-the-loop Simulator for Spacecraft Attitude Control Using Thrusters [PDF]
Journal of Astronomy and Space Sciences, 2009 In this study, a Hardware-In-the-Loop (HIL) simulator using thrusters is developed to validate the spacecraft attitude system. To control the attitude of the simulator, eight cold gas thrusters are aligned with roll, pitch and yaw axis.
Dong-Wook Koh +3 more
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A Preliminary Development of Real-Time Hardware-in-the-Loop Simulation Testbed for the Satellite Formation Flying Navigation and Orbit Control [PDF]
Journal of Astronomy and Space Sciences, 2009 The main purpose of the current research is to developments a real-time Hardware In-the-Loop (HIL) simulation testbed for the satellite formation flying navigation and orbit control.
Jae-Ik Park +4 more
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Design of Orbit Controls for a Multiple CubeSat Mission Using Drift Rate Modulation
Aerospace, 2021 For the low-cost improvement of laser communication, which is critical for various applications such as surveillance systems, a study was conducted on relative distance control based on orbital drift rate modulations for multiple CubeSats during ...
Youngbum Song +3 more
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Research on BG characteristics of a new multi-bandgap PnC
AIP Advances, 2022 The bandgap (BG) of a phononic crystal (PnC) can suppress the propagation of elastic waves and has great potential in suppressing vibration. In this paper, a new type of multi-BG PnC is studied, which has many BGs in the low frequency. The eigenfrequency
Yake Dong +5 more
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Autonomous Real-time Relative Navigation for Formation Flying Satellites [PDF]
Journal of Astronomy and Space Sciences, 2009 Relative navigation system is presented using GPS measurements from a single-channel global positioning system (GPS) simulator. The objective of this study is to provide the real-time inter-satellite relative positions as well as absolute positions for ...
Sunhwa Shim +2 more
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The multi-bandgap of local effect phononic crystal
AIP Advances, 2023 A design method of a phononic crystal structure with a local effect is introduced, and the mechanism and influencing factors (elastic modulus, density, local layer thickness) of the bandgap are analyzed. The finite element method is used to calculate the
Yake Dong +3 more
doaj +1 more source