Author: K. B. HayashidaPublisher:
ISBN:
Category : Microspacecraft
Languages : en
Pages : 36
Book Description
SEDS Tether M/OD Damage Analyses
Author: K. B. HayashidaPublisher:
ISBN:
Category : Microspacecraft
Languages : en
Pages : 36
Book Description
Seds Tether M/Od Damage Analyses
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722761547
Category :
Languages : en
Pages : 32
Book Description
The Small Expendable Deployer System (SEDS) was designed to deploy an endmass at the end of a 20-km-long tether which acts as an upper stage rocket, and the threats from the meteoroid and orbital debris (M/OD) particle environments on SEDS components are important issues for the safety and success of any SEDS mission. However, the possibility of severing the tether due to M/OD particle impacts is an even more serious concern, since the SEDS tether has a relatively large exposed area to the M/OD environments although its diameter is quite small. The threats from the M/OD environments became a very important issue for the third SEDS mission, since the project office proposed using the shuttle orbiter as a launch platform instead of the second stage of a Delta II expendable rocket, which was used for the first two SEDS missions. A series of hyper-velocity impact tests were performed at the Johnson Space Center and Arnold Engineering Development Center to help determine the critical particle sizes required to sever the tether. The computer hydrodynamic code or hydrocode called CTH, developed by the Sandia National Laboratories, was also used to simulate the damage on the SEDS tether caused by both the orbital debris and test particle impacts. The CTH hydrocode simulation results provided the much needed information to help determine the critical particle sizes required to sever the tether. The M/OD particle sizes required to sever the tether were estimated to be less than 0.1 cm in diameter from these studies, and these size particles are more abundant in low-Earth orbit than larger size particles. Finally, the authors performed the M/OD damage analyses for the three SEDS missions; i.e., SEDS-1, -2, and -3 missions, by using the information obtained from the hypervelocity impact test and hydrocode simulations results. Hayashida, K. B. and Robinson, J. H. and Hill, S. A. Marshall Space Flight Center ...
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1250
Book Description
FY 1998 Scientific and Technical Reports, Articles, Papers, and Presentations
Author: Dynamic Analysis of Space Tether Missions
Author: Evgeniĭ Mikhaĭlovich LevinPublisher: Univelt Incorporated
ISBN: 0877035385
Category : Science
Languages : en
Pages : 463
Book Description
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 602
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
FY 1995 Scientific and Technical Reports, Articles, Papers, and Presentations, Volume 1
Author: Tether Technology Interchange Meeting
Author: Rothman-Simeone The Spine E-Book
Author: Harry N. HerkowitzPublisher: Elsevier Health Sciences
ISBN: 1437736246
Category : Medical
Languages : en
Pages : 2021
Book Description
Rothman-Simeone The Spine helps you achieve optimal outcomes in the clinical practice of spine surgery in adults and children. Drs. Harry N. Herkowitz, Steven R. Garfin, Frank J. Eismont, Gordon R. Bell, Richard Balderston, and an internationally diverse group of authorities help you keep up with the fast-paced field and get the best results from state-of-the-art treatments and surgical techniques, such as spinal arthroplasty and the latest spinal implants and equipment. An all-new full-color design and surgical videos online at www.expertconsult.com make this classic text more invaluable than ever before. Get the best results from the full range of both surgical and non-surgical treatment approaches with guidance from the world’s most trusted authorities in orthopaedic spine surgery. Find important information quickly through pearls, pitfalls, and key points that highlight critical points. Watch experts perform key techniques in real time with videos, on DVD and online, demonstrating minimally invasive surgery: SED procedure; thorascopic techniques; lumbar discectomy; pedicle subtraction osteotomy (PSO); C1, C2 fusion; intradural tumor; cervical laminoforaminoty; and much more. Apply the newest developments in the field thanks to expert advice on minimally invasive surgery, spinal arthroplasty and the latest spinal implants and equipments. See procedures clearly through an all new full-color design with 2300 color photographs and illustrations placed in context. Access the fully searchable contents of text online at www.expertconsult.com.
Author: