Results 371 to 380 of about 383,072 (432)

Spacecraft design considerations for spacecraft charging environments

2017 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), 2017
Spacecraft charging (surface and internal) is complex physical phenomena that can have serious ramifications on mission success. The degree of spacecraft charging a spacecraft may experience is heavily dependent on both the surrounding space environment and spacecraft geometry (more specifically, the geometry and material makeup of the spacecraft).
openaire   +2 more sources

Modeling and adaptive control for a spatial flexible spacecraft with unknown actuator failures

Science China Information Sciences, 2021
Zhijie Liu, Zhiji Han, Zhijia Zhao, W. He   +3 more
semanticscholar   +1 more source

Attitude and Orbit Optimal Control of Combined Spacecraft via a Fully-Actuated System Approach

Journal of Systems Science and Complexity, 2022
G. Duan, Guo-Ping Liu
semanticscholar   +1 more source

The Spacecraft Antennas

Bell System Technical Journal, 1963
The spacecraft employs two microwave antennas for communications and a single VHF antenna for telemetry, beacon, and command functions. One microwave antenna centered at 6 gc is used to receive broadband signals from a ground transmitter while the other microwave antenna centered at 4 gc is used to transmit signals to a ground receiver.
E. T. Harkless, R. V. Sperry, E. J. Walsh, J. T. Bangert, R. S. Engelbrecht   +4 more
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Robust Model-Based Monocular Pose Initialization for Noncooperative Spacecraft Rendezvous

Journal of Spacecraft and Rockets, 2018
This work addresses the design and validation of a robust monocular vision-based pose initialization architecture for close-range onorbit-servicing and formation-flying applications.
Sumant Sharma, Jacopo Ventura, S. D’Amico   +2 more
semanticscholar   +1 more source

Foton Capsule, Spacecraft

2011
Foton is an unmanned recoverable spacecraft, designed and manufactured by TsSKB-Progress in Samara (Russia). Fifteen Fotons were launched between 1985 and 2007, initially from Plesetsk, later from Baikonur. The launch vehicle is a Soyuz-U. The reentry capsule is spherically shaped with a diameter of 2.3 m.
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Fixed-time rendezvous control of spacecraft with a tumbling target under loss of actuator effectiveness

IEEE Transactions on Aerospace and Electronic Systems, 2016
This paper investigates the fixed-time fault-tolerant control problem of spacecraft rendezvous and docking with a freely tumbling target in the presence of external disturbance and thruster faults.
Boyan Jiang, Q. Hu, M. Friswell
semanticscholar   +1 more source

Nonlinear Energy Sink for Whole-Spacecraft Vibration Reduction

, 2017
A nonlinear energy sink (NES) approach is proposed for whole-spacecraft vibration reduction. Frequency sweeping tests are conducted on a scaled whole-spacecraft structure without or with a NES attached.
Yang Kai, Yewei Zhang, H. Ding, Tianzhi Yang, Yang Li, Liqun Chen   +5 more
semanticscholar   +1 more source

The ACTS spacecraft

14th International Communication Satellite Systems Conference and Exhibit, 1992
The tested physical and performance characteristics of the ACTS spacecraft are presented with emphasis placed on those for the multibeam antenna, the communications electronics panel, and the bus. Performance measurements for the multibeam antenna agree with predicted parameters, and the electronics panel provides four transponder channels for ...
openaire   +2 more sources

Attitude Synchronization for Flexible Spacecraft With Communication Delays

IEEE Transactions on Automatic Control, 2016
The attitude synchronization problem for a group of flexible spacecraft is discussed in this note. Meanwhile, the communication delay among these spacecraft is also considered.
Haibo Du, Shihua Li
semanticscholar   +1 more source