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6 results on '"SPACE flight propulsion systems"'

1. Stability and control of microwave-propelled sails in 1-D.

Author

Abdallah, Chaouki T., Schamiloglu, Edl, Benford, James, and Benford, Gregory

Subjects
*SPACE flight propulsion systems, *STRUCTURAL stability
Abstract

This paper is concerned with the stability of carbon fiber sail structures that are being studied in a series of experiments at the Jet Propulsion Laboratory (JPL) by a team led by Microwave Sciences, Inc. The passive dynamic stability in the one-dimensional (l-D) case is most easily understood in terms of the fixed points of the trajectories for the governing equations of motion. The simple 1-D model introduces the possibility of controlling a microwave-propelled sail using various nonlinear control strategies. This work will be extended in the future to control the full 3-D case. We present results of studies from the 1-D analysis. In addition to providing guidance to ongoing and near term proof-of-principle experiments, this work will lead to novel strategies for enabling a feedback power controller to maintain a sail fixed at a predetermined height. [ABSTRACT FROM AUTHOR]

Published
2001

2. 3-D simulations of rigid microwave-propelled sails including spin.

Author

Schamiloglu, Edl, Abdallah, Chaouki T., Miller, Kristina A., Georgiev, Daniel, Benford, James, Benford, Gregory, and Singh, Gurkirpal

Subjects
*SPACE flight propulsion systems, *BEAM dynamics
Abstract

This paper discusses the three-dimensional (3-D) stability of carbon fiber sail structures (beam riders) that are being studied in a series of experiments at the Jet Propulsion Laboratory (JPL) and U.C. Irvine by a team led by Microwave Sciences, Inc. The stability analysis is developed for a limited set of conical sail configurations, and the code described in this paper has been developed at JPL by one of the coauthors. The assumptions in the model and the principles behind the simulation, in addition to their relationship to earlier experiments utilizing disk configurations are discussed. Results of stability analyses for several beam rider configurations will be presented at the Forum. [ABSTRACT FROM AUTHOR]

Published
2001

3. Solar-Sail Enthusiasts Say Mission Lost, Possibly in Space.

Author

Clery, Daniel

Subjects
*SPACE flight propulsion systems, *SOLAR system
Abstract

The article reports that Cosmos 1, a privately funded spacecraft that aimed to demonstrate solar sailing for the first time, appears never to have had a chance to unfurl its sails. But staff from the Pasadena, California-based Planetary Society, the non-profit organization running the project, say tantalizing messages ground controllers received shortly after the craft's launch on June 21, 2005, hint that it might have made it into orbit. Officials from the Russian Space Agency, which launched the spacecraft on board a converted ICBM from a submarine in the Barents Sea, believe the rocket's first stage failed, causing launcher and payload to crash into the sea. There researchers would have inflated booms to spread eight solar sails made of ultra light reflective Mylar, designed to show that the pressure of sunlight could slowly push Cosmos 1 into a higher orbit. The main space agencies hope to use solar sails to reach parts of the solar system inaccessible to chemical rockets. The project director Louis Friedman says the Planetary Society is talking to the mission's main sponsor, the entertainment company Cosmos Studios, and others about mounting another attempt.

Published
2005
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4. Deep Space 1 Enters Safe Mode After Ion Engine Falters.

Author

Dornheim, Michael A.

Subjects
*SPACE probes, *SPACE flight propulsion systems, *AEROSPACE industries
Abstract

Focuses on problems encountered by Jet Propulsion Laboratory's Deep Space 1 (DS1) probe on November 11, 1998. The safe mode which the probe entered into; Design of the probe's engine; Checks of xenon propellant flow and electrical operation of the engine which went well; When recycle occurs; Other causes of recycling; Existence of consistent problems obtaining star tracker data since launch; DS1's Beacon Monitor experiment to perform an onboard evaluation of spacecraft health upon activation.

Published
1998

5. Stays The Course.

Subjects
*GEOSTATIONARY satellites, *SPACE flight propulsion systems
Abstract

The article reports on the progress in the Space Based Infrared System (SBIRS), a space program of the U.S. It informs that the core structure of the SBIRS geosynchronous satellite (GEO-4), which is the fourth of the U.S. Navy, has been delivered to Lockheed Martin and mentions that the propulsion system of the spacecraft will be integrated at the Mississippi Space & Technology Center in Mississippi. It states that the module with be finally assembled at Lockheed's facility in California.

Published
2012

6. Manned Private Craft Reaches Space in Milestone for Flight.

Author

Schwartz, John

Subjects
*ASTRONAUTS, *AIR pilots, *HUMAN space flight, *SPACE vehicle piloting, *SPACE exploration, *AERONAUTICS, *ROCKETRY, *SPACE flight propulsion systems
Abstract

Reports on how the veteran civilian test pilot, Michael W. Melvill, became the first human to reach space in a privately devloped program designed by Burt Rutan and his company Scaled Composites. How Melvill guided a tiny rocket ship for more than 60 miles above California and then 300,000 feet further to space; Consideration of how Melvill was presented with astronaut wings by the Federal Aviation Administration after his flight; Speculation on the future of launching civilians into outer space; Consideration of how thousands of spectators came out to watch the event.

Published
2004

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