Results 91 to 100 of about 34,916 (185)

Aeronautical Engineering: A special bibliography with indexes, supplement 54 [PDF]

open access: yes
This bibliography lists 316 reports, articles, and other documents introduced into the NASA scientific and technical information system in January ...

core   +1 more source

Experimental Results of Concurrent Learning Adaptive Controllers [PDF]

open access: yes, 2012
Commonly used Proportional-Integral-Derivative based UAV flight controllers are often seen to provide adequate trajectory-tracking performance only after extensive tuning.
Borkar V.   +9 more
core   +2 more sources

Test Plan for the Technology Maturation of Supersonic Inflatable Aerodynamic Decelerators [PDF]

open access: yes, 2009
Supersonic inflatable aerodynamic decelerators (IADs) are drag devices intended to be deployed at high Mach numbers. In the application considered here they assist in the descent and landing of spacecraft on Mars.
Cruz, Juan R., Kelly, Jenny R.
core   +1 more source

Advanced Method to Estimate Fuel Slosh Simulation Parameters [PDF]

open access: yes, 2005
The nutation (wobble) of a spinning spacecraft in the presence of energy dissipation is a well-known problem in dynamics and is of particular concern for space missions.
Gangadharan, Sathya   +5 more
core   +1 more source

NASA Puffin Electric Tailsitter VTOL Concept [PDF]

open access: yes, 2010
Electric propulsion offers dramatic new vehicle mission capabilities, not possible with turbine or reciprocating engines; including high reliability and efficiency, low engine weight and maintenance, low cooling drag and volume required, very low noise ...
Moore, Mark D.
core   +1 more source

NASA to launch second business communications satellite [PDF]

open access: yes
The two stage Delta 3910 launch vehicle was chosen to place the second small business satellite (SBS-B) into a transfer orbit with an apogee of 36,619 kilometers and a perigee of 167 km, at an inclination of 27.7 degrees to Earth's equator.

core   +1 more source

Integrated Atmosphere Resource Recovery and Environmental Monitoring Technology Demonstration for Deep Space Exploration [PDF]

open access: yes, 2012
Exploring the frontiers of deep space continues to be defined by the technological challenges presented by safely transporting a crew to and from destinations of scientific interest.
Abney, Morgan B.   +5 more
core   +1 more source

Powering Exploration: The Ares I Crew Launch Vehicle and Ares V Cargo Launch Vehicle [PDF]

open access: yes, 2008
The National Aeronautics and Space Administration (NASA)'s Constellation Program is depending on the Ares Projects to deliver the crew and cargo launch capabilities needed to send human explorers to the Moon and beyond. The Ares Projects continue to make
Cook, Stephen A.
core   +1 more source

Pitch Guidance Optimization for the Orion Abort Flight Tests [PDF]

open access: yes, 2010
The National Aeronautics and Space Administration created the Constellation program to develop the next generation of manned space vehicles and launch vehicles. The Orion abort system is initiated in the event of an unsafe condition during launch.
Stillwater, Ryan Allanque
core   +1 more source

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