نتایج جستجو برای: aerospace propulsion

تعداد نتایج: 18151  

2006
Sean D. Knecht George H. Miley

The objective of this study was to perform a parametric evaluation of the performance and interface characteristics of a dense plasma focus (DPF) fusion system in support of a USAF advanced military aerospace vehicle concept study. This vehicle is an aerospace plane that combines clean “aneutronic” dense plasma focus (DPF) fusion power and propulsion technology, with advanced “waverider”-like a...

2013
Alexander Bolonkin

Aviation, in general, and aerospace in particular needs new propulsion systems which allow the craft to reach high speeds by cheaper and more efficient methods. Author offers a new propulsion system using electrons for acceleration of the craft and having a high efficiency. As this system does not heat the air, it does not have the heating limitations of conventional air ramjet hypersonic engin...

2006
Thomas H. Bradley

This paper describes a methodology for design and optimization of a polymer electrolyte membrane (PEM) fuel cell unmanned aerial vehicle (UAV). The focus of this paper is the optimization of the fuel cell propulsion system and hydrogen storage system for a baseline aircraft. Physics-based models, and experimentally-derived sub-system performance data are used to characterize the performance of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی هوافضا 1386

با توجه به اینکه موشک بالستیک در فاز فعال مسیر، دستخوش تغییرات پارامترهای سیستمی (شامل اطلاعات جرمی- اینرسی،ارتفاع پروازی،سرعت، و ....) است هدف طراحی کنترلری است که بتواند جوابگوی این تغییرات باشد ابتدا معادلات حرکت موشک نوشته شده سپس با فرض تقارن هندسی- جرمی ساده سازی می شوند و با استفاده از روش خطی سازی حول نقطه کاری به سه دسته جدا از هم تقسیم می شوند که عبارتند از: 1-معادلات کانال پیچ. 2-م...

Journal: :General dentistry 2016
Esra Yuce Gulperi Koçer Turan Atila Çini

Aerospace medicine is the medical discipline responsible for assessing and conserving the health, safety, and performance of individuals involved in air and space travel. With the upward trend in airline travel, flight-related oral conditions requiring treatment have become a source of concern for aircrew members. Awareness and treatment of any potential physiological problems for these aircrew...

2008
Victoria S. Meadows Glenn Orton Mao-Chang Liang Yuk L. Yung Jeffrey Van Cleve Martin J. Burgdorf

a Spitzer Science Center/California Institute of Technology, MS 220-6, 1200 E. California Blvd, Pasadena, CA 91125, USA b Jet Propulsion Laboratory/California Institute of Technology, MS 169-237, 4800 Oak Grove Drive, Pasadena, CA 91109, USA c University of Wisconsin, Department of Astronomy, 5534 Sterling Hall, 475 N. Charter St., Madison, WI 53706, USA d California Institute of Technology, Ge...

2013
K. Krohn

K. Krohn (1), R. Jaumann (1,2), D. Elbeshausen (3), T. Kneissl (2), F. Preusker (1), T. Roatsch (1), N. Schmedemann (2), C.A. Raymond (4), C.T. Russell (5) (1) Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany, (2) Freie Universität Berlin, Planetary Sciences and Remote Sensing, Berlin, Gemany, (3) Museum für Naturkunde, Leibniz-Institut für Evolutionsund Biodivers...

2017
Matteo Laterza Igal Kronhaus

Copyright c ©2017 by the Aerospace Plasma Laboratory, Technion. Published by the Electric Rocket Propulsion Society with permission. A multiscale model was developed for the channel of a CoAxial Magnetically Insulated Long Anode (CAMILA) Hall effect thruster. The computational domain was subdivided into a region where a hybrid solver is used and a region where a fully kinetic particle in cell s...

2013
Archana Nanoty

For machine drive applications, multiphase induction motor could potentially meet the demand for high power electric drive systems which are both rugged and energy efficient. High phase number drives possess several advantages over conventional three phase drives such as high torque, higher reliability and increased power. Multiphase induction motors have found many applications such as electri...

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