Results 81 to 90 of about 701,425 (185)
Conceptual design of pointing control systems for space station gimballed payloads [PDF]
A conceptual design of the control system for Payload Pointing Systems (PPS) is developed using classic Proportional-Integral-Derivatives (PID) techniques.
Hughes, Robert O.
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IEEE AccessDespite their multitude of benefits, free-space optical (FSO) communication systems experience severe performance degradation due to the diverse atmospheric conditions commonly present in their deployment areas.
Aser M. Matarneh
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Viking Orbiter 1975 thrust vector control system accuracy [PDF]
The thrust vector control (TVC) system of the Viking Orbiter 1975 is discussed. The purpose of the TVC system is to point the engine thrust at the vehicle center of mass and to maintain attitude stability during propulsive maneuvers. This is accomplished
Mcglinchey, L. F.
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Minimizing Change-Point Estimation Error
, 2023 In this paper we consider change-points in multiple sequences with the objective of minimizing the estimation error of a sequence by making use of information from other sequences. This is in contrast to recent interest on change-points in multiple sequences where the focus is on detection of common change-points.
openaire +2 more sources
Recovering and Improvement of the Ancient Chinese South-pointing Chariot
Jixie chuandong, 2018 To recover ancient Chinese south-pointing chariot,the principle of planetary gear trains and differential gear trains is studied. The structure of Lanchester south-pointing chariot is made of gear trains and body frame manufactured by 3 D printer.
Liu Zhao +3 more
doaj
In-flight calibration of the high-gain antenna pointing for the Mariner Venus-Mercury 1973 spacecraft [PDF]
The methods used to in-flight calibrate the pointing direction of the Mariner Venus-Mercury 1973 spacecraft high gain antenna and the achieved antenna pointing accuracy are described.
Hardman, J. M. +2 more
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Hubble space telescope: Pointing error effects on nonlinear ball joints [PDF]
The Hubble Space Telescope pointing error produced by optical benches mounted on free ball joints is examined. Spacecraft cable connections are assumed to produce translational and rotational damping and restoring forces which act through the optical ...
Farmer, J. E., Grissett, F. R.
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Analytical simulation of SPS system performance, volume 3, phase 3 [PDF]
The simulation model for the Solar Power Satellite spaceantenna and the associated system imperfections are described. Overall power transfer efficiency, the key performance issue, is discussed as a function of the system imperfections.
Kantak, A. V., Lindsey, W. C.
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Performance Analysis of IRS-Assisted Multi-Link FSO System Under Pointing Errors
IEEE Photonics JournalThe integration of intelligent reflecting surfaces (IRS) into free-space optical (FSO) communication systems is considered as a promising and innovative approach to overcoming existing challenges due to the strict line-of-sight (LoS) requirements faced ...
Takumi Ishida +3 more
doaj +1 more source