1–20 von 475 Ergebnissen
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    Broadcast ephemeris SISRE assessment and systematic error characteristic analysis for BDS and GPS satellite systems

    Jiang, Nana / Cao, Yueling / Xia, Fengyu et al. | Elsevier | 2024
    Abstract This study comprehensively evaluated the signal-in-space range ...

    Orion Artemis I as Flown MMOD Analysis

    Kevin D Deighton / Eric L Christiansen / Dana M Lear et al. | NTRS | 2023
    to aid in improving the analysis, including the environment models. The comparison showed that Bumper analysis predictions were generally ...
    Schlagwörter: Systems Analysis and Operations Research

    A Preliminary Research on Space Situational Awareness Based on Event Cameras

    Xiao, Kun / Li, Pengju / Wang, Guohui et al. | IEEE | 2022
    , low bandwidth and low power consumption. We carried out a series of observation experiments in a simulated space lighting environment. The ...

    Numerical Investigation of Thermo-Mechanical Behaviour of an Aluminum-Silicon Alloy Piston in an IC Engine

    Khan, Shah Nawaz / Usman, Ali / Mourad, Abdel-Hamid Ismail et al. | IEEE | 2022
    Increasing the power to volume density of an engine has been a significant research concern. A turbocharger is usually utilized to boost ...

    Full-Scale 3D Heavy Haul Train-Track Dynamics Modelling Method

    Wu, Qing / Spiryagin, Maksym / Cole, Colin | Springer Verlag | 2022
    implementations of such simulations can unlock a series of research topics such as vehicle derailments in train operational environment and track dynamics ...

    Self-Powered Dust Mitigation on the Moon

    Choi, Sang H. / Moses, Robert W. | ASCE | 2021
    at NASA Langley Research Center to demonstrate feasibility of a prototype in a simulated lunar environment. Further work is intended to ...

    Granular Morphology and Mineralogical Composition for Modeling Lunar Dust Behavior

    Deitrick, S. R. / Bullard, J. / Shumaker, N. et al. | ASCE | 2021
    the Moon, but also in situ resource utilization (ISRU) efforts such as resource processing, resource excavation, and in situ construction ...

    Quality Assessment of 3D Printed Products

    Soliman, Essam / Alzahrani, Bander | IEEE | 2021
    The present research considered the effects of different 3D printing parameters on the quality of 3D printed products. The parameters ...

    New Model and Analytical Review of Approaches to Buckling Problem Investigation of Structurally Anisotropic Aircraft Panels Made from Composite Materials

    Gavva, L. M. | Springer Verlag | 2020
    composite structure design in the field of production technology is the outlook research trend. New mathematical model relations for the buckling ...

    Spacecraft Anomaly Detection via Transformer Reconstruction Error

    Meng, Hengyu / Zhang, Yuxuan / Li, Yuanxiang et al. | Springer Verlag | 2020
    models, due to its ignoring distance. In this paper, we continue the research on transformer and propose a transformer-based architecture, masked ...

    NASA's Space Launch System: Secondary Payload Accommodations in Block 1 and Beyond

    Robinson, Kimberly F. / Schorr, Andrew A. / Gardner, Terrie | NTRS | 2018
    vehicle to a distant retrograde lunar orbit in order to test and validate the new systems developed for SLS, Orion and Kennedy Space Center's ...
    Schlagwörter: Launch Vehicles And Launch Operations

    Aerodynamic actuation characteristic research of array plasma synthetic jet actuator

    Li, Zheng / Shi, Zhiwei / Du, Hai et al. | IEEE | 2017
    An array PSJA is tested in this paper by using high-speed phase-lock schlieren system. The characteristic of the transient flow field is ...

    Research on general unified normalization computing for the gravitational potential tensor of arbitrary orders

    Dong, Changhong / Wang, Yu / Gao, Xiaoqing et al. | IEEE | 2017
    harmonic series in a rectangular structure of all orders are constructed herein for the evaluation of arbitrary order derivatives, whose ...

    The MISSE-9 Polymers and Composites Experiment Being Flown on the MISSE-Flight Facility

    De Groh, Kim K. / Banks, Bruce A. | NTRS | 2017
    Materials on the exterior of spacecraft in low Earth orbit (LEO) are subject to extremely harsh environmental conditions, including various ...

    Investigation on the dynamic behavior of machine tool with respect to different worktable feed rates

    Mao, Xinyong / Liu, Quanxin / Li, Bin et al. | IEEE | 2016
    machine tool. In this paper, a method of modal decoupling of Operational Deflection Shapes (ODS) was proposed to investigate the dynamic behavior ...

    Numerical analysis and experiment research on fluid orbital performance of vane type propellant management device

    Hu, Q. / Li, Y. / Pan, H.L. et al. | Tema Archiv | 2015
    orbital performance directly determines the STT's success or failure. In present paper, numerical analysis and microgravity experiment study on ...

    Disentangling the magnetic force noise contribution in LISA Pathfinder

    Armano, M. / Audley, H. / Auger, G. et al. | Tema Archiv | 2015
    the test masses with the environmental magnetic field. In order to fully understand this important part of the noise model, a set of coils and ...

    Adhesive Bonding for Optical Metrology Systems in Space Applications

    Gohlke, Martin / Schuldt, Thilo / Döringshoff, Klaus et al. | Tema Archiv | 2015
    such as mSTAR (mini SpaceTime Asymmetry Research), a mission dedicated to perform a Kennedy-Thorndike experiment on a satellite in a low-Earth ...

    In-flight thermal experiments for LISA Pathfinder: Simulating temperature noise at the Inertial Sensors

    Gibert, F. / Nofrarias, M. / Armano, M. et al. | Tema Archiv | 2015
    to 1 mHz during some LTP experiments. In this paper we report on how these kind of Thermal Diagnostics experiments were simulated in the last ...

    Effects of ground impact on traumatic brain injury in a fender vault pedestrian crash

    Tamura, Atsutaka / Koide, Takao / Yang, King H. | Tema Archiv | 2015
    The present study replicated a series of vehicle-to-pedestrian crashes involved in a right-corner frontal impact up to a secondary or ...