Design of a Nonlinear Adaptive Filter for Suppression of Shuttle Pilot-Induced Oscillation Tendencies
Design of a Nonlinear Adaptive Filter for Suppression of Shuttle Pilot-Induced Oscillation Tendencies

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-07-26

Total Pages: 30

ISBN-13: 9781724283573

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Analysis of a longitudinal pilot-induced oscillation (PIO) experienced just prior to touchdown on the final flight of the space shuttle's approach landing tests indicated that the source of the problem was a combination of poor basic handling qualities aggravated by time delays through the digital flight control computer and rate limiting of the elevator actuators due to high pilot gain. A nonlinear PIO suppression (PIOS) filter was designed and developed to alleviate the vehicle's PIO tendencies by reducing the gain in the command path. From analytical and simulator studies it was shown that the PIOS filter, in an adaptive fashion, can attenuate the command path gain without adding phase lag to the system. With the pitch attitude loop of a simulated shuttle model closed, the PIOS filter increased the gain margin by a factor of about two. Smith, J. W. and Edwards, J. W. Armstrong Flight Research Center NASA-TM-81349, H-1119 RTOP 992-07

From Runway to Orbit
From Runway to Orbit

Author: Kenneth W. Iliff

Publisher: History Office

Published: 2004

Total Pages: 432

ISBN-13:

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NOTE: NO FURTHER DISCOUNT FOR THIS PRINT PRODUCT--OVERSTOCK SALE -- Significantly reduced list price while supplies last NASA SP 2004-4109. NASA History Series. Presents the memoirs of Dr. Kenneth W. Iliff, the retired Chief Scientist of NASA Dryden Flight Research Center. He worked at NASA from 1962-2002. Related products: Commercial Orbital Transportation Services: A New Era in Spaceflight is available here: https: //bookstore.gpo.gov/products/sku/033-000-01367-1 Reference Guide to the International Space Station is available here: https: //bookstore.gpo.gov/products/sku/033-000-01373-6 Other products produced by the U.S. National Aeronautics and Space Administration (NASA) can be found here: https: //bookstore.gpo.gov/agency/550"

History of the Space Shuttle, Volume Two
History of the Space Shuttle, Volume Two

Author: T. A. Heppenheimer

Publisher: Smithsonian Institution

Published: 2014-09-30

Total Pages: 552

ISBN-13: 158834441X

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Basing his work on virtually untapped NASA archives, T. A. Heppenheimer has produced the second volume of his definitive history of the space shuttle. Volume Two traces the development of the shuttle through a decade of engineering setbacks and breakthroughs, program-management challenges, and political strategizing, culminating in the first launch in April 1981. The focus is on the engineering challenges—propulsion, thermal protection, electronics, onboard systems—and the author covers in depth the alternative vehicles developed by the U.S. Air Force and European countries. The first launch entailed a monumental amount of planning and preparation that Heppenheimer explains in detail.