Published: Wed, 20 Feb 2008 08:59:58 -0500
Last Build Date: Wed, 20 Feb 2008 09:04:52 -0500Copyright: NASA
Wed, 08 Nov 2006 07:54:51 -0500This seminar describes advances that have been made in extracting information efficiently and reliably from large, distributed, multiple, heterogeneous sources of aviation safety data.
Thu, 16 Nov 2006 11:18:01 -0500This seminar addresses the history and successful progress in predicting and improving the crash safety characteristics of vehicles, with particular emphasis on rotary wing aircraft and composite structures.
Fri, 08 Dec 2006 11:18:01 -0500The current state-of-the-art in planetary entry, decent, and landing (EDL) systems is derived primarily from a 30 year old technology set developed for the Mars Viking Program, including the heritage spherically blunted conical aeroshell geometry, ablative thermal protection system material, and the supersonic disc-gap-band parachute. Optimistic estimates predict that the current Viking derived EDL architecture, which relies primarily on the technologies developed in the 1960s and '70s, may be extensible to allow landed masses up to a maximum of on the order of two metric tons as parachute diameters and ballistic entry masses increase to limiting values.
Fri, 02 Feb 2007 13:58:01 -0500A safe and efficient air traffic management system is vital to the nation's economy. Demand for air traffic operations is expected to grow by a factor of two or three over the next 20 years. Today's operating concept, however, where air traffic controllers ensure safe separation primarily through visual and cognitive analysis of radar traffic displays, will not support a substantial increase in traffic volume.
Fri, 18 May 2007 11:33:07 -0400Hypersonic vehicles differ significantly from rocket-based vehicles in their architecture and mission. This presentation will discuss some of the recent advances in TPS and hot structures for hypersonic vehicles and the technical challenges that need to be overcome.
Wed, 30 May 2007 14:32:04 -0400This seminar provides an overview of previous research related to onboard real-time modeling to characterize aircraft stability and control, followed by a discussion of technical challenges and NASA research in this area.
Wed, 11 Jul 2007 14:33:04 -0400A safe and efficient aviation industry is vital to the global economy. The growing traffic demand, rise in oil prices, delays in building new runways and security issues are putting pressures on the system to evolve from the current procedure-based human-centered system to a more flexible system with higher levels of automation.
Tue, 02 Oct 2007 14:05:04 -0400In today's modern commercial jet engines the fan case is among the largest and heaviest components of the engine.
Fri, 26 Oct 2007 11:34:01 -0400Advances in aircraft noise research can be attributed to the development of new technologies and sustained collaboration with industry, universities and government organizations. Emphasis has been given to developing noise prediction methods, diagnostic methods for determining noise sources, and noise reduction methods that are applicable across a wide range of aircraft.
Fri, 07 Dec 2007 17:59:06 -0500Laser-spectroscopic imaging methods can provide high-quality visualizations of planar slices in hypersonic flows and measure parameters like temperature, velocity, pressure and gas composition without disturbing the flow itself. The Hypersonics project of the Fundamental Aeronautics Program is developing a method for 2D and 3D imaging of hypersonic flows, called Nitric Oxide Planar Laser-Induced Fluorescence (NO-PLIF).
Wed, 20 Feb 2008 09:04:42 -0500Reduced visibility affects the safety and efficiency of nearly all flight operations. As a result, researchers have looked for ways to improve and/or provide a vision capability to pilots that is independent of actual visibility or weather conditions. In recent years, research has focused on two technologies - Synthetic and Enhanced Vision Systems (SVS/EVS). SVS technology provides pilots with a virtual visual depiction of features in the external environment superimposed with relevant aircraft state, guidance, and navigation information. In an SVS, the geographic location and dimensions of many of these features are stored in on-board databases or models.
Fri, 30 May 2008 01:06:17 -0500Aircraft noise and local air quality concerns are strong constraints on airspace system capacity. These constraints have prompted cancellation, delays, and down-scaling of plans to expand airport capacity over the past decades. Looking forward, we see more environmental challenges to capacity expansion, including climate change issues.
Wed, 30 July 2008 09:05:15 -0500Electron beam freeform fabrication (EBF³) is a cross-cutting technology for producing structural metal parts. Developed by researchers at NASA's Langley Research Center as a replacement for forgings, this manufacturing process offers significant reductions in cost and lead time.
Wed, 31 July 2008 09:10:35 -0500The objective of an intelligent controller is to achieve higher degrees of autonomy. Desired characteristics of such a control system include decision-making under uncertainty, fault-tolerance, learning and adaptation, real-time and long-term performance optimization, and adoptability across platforms.
Wed, 24 September 2008 01:42:35 -0500Shape memory alloys are a unique group of materials that remember their original shape and return to that shape after being strained. While the biomedical industry has taken advantage of the highly unusual pseudo elastic behavior of shape memory alloys for numerous medical devices, the aerospace, automotive, and energy exploration industries, in particular, could benefit from exploiting shape memory behavior.
Tue, 25 November 2008 01:11:42 -0500Recent breakthroughs in gas-lubricated foil bearings, high temperature solid lubricants and computer based modeling enable the deployment of revolutionary oil-free turbomachinery systems that weigh less and cost less to operate and maintain.