Analysis Of Effects Of Spanwise Variations Of Gust Velocity On A Vane Controlled Gust Alleviation System
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Analysis Of Effects Of Spanwise Variations Of Gust Velocity On A Vane Controlled Gust Alleviation System
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Author : L. Keith Barker
language : en
Publisher:
Release Date : 1971
Analysis Of Effects Of Spanwise Variations Of Gust Velocity On A Vane Controlled Gust Alleviation System written by L. Keith Barker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Gust loads categories.
An analysis has been made of the effects of spanwise variations of gust velocity in isotropic turbulence on a gust-alleviation system which employs an angle-of-attack vane mounted ahead of the wing to sense the vertical gust velocity. The wing flaps were moved in response to the vane deflection by a linear second-order servosystem to produce a lift opposite to that produced by the gust. Consideration of spanwise variation of gusts has indicated design parameters (gain and natural frequency of flap servosystem and vane location) that give substantial reduction of the lift due to gusts.
Effect Of Limited Amplitude And Rate Of Flap Motion On Vane Controlled Gust Alleviation System
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Author : L. Keith Barker
language : en
Publisher:
Release Date : 1972
Effect Of Limited Amplitude And Rate Of Flap Motion On Vane Controlled Gust Alleviation System written by L. Keith Barker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Aerodynamic measurements categories.
An airplane (light transport type) is assumed to be in level flight (no pitching) through atmospheric turbulence which has a mean-square vertical gust intensity of 9.3 (m/sec)sq. The power spectral density of the vertical acceleration due to gusts is examined with and without a gust-alleviation system in operation. The gust-alleviation system consisted of wing flaps that were used in conjunction with a vane mounted ahead of the airplane to sense the vertical gust velocity. The primary purpose of this study was to examine the change in the effectiveness of the gust-alleviation system when the flap motion is limited in amplitude and rate. The alleviation system was very effective if no restrictions were placed on flap motion (rate and amplitude). Restricting the flap amplitude to 0.5 radian did not appreciably change the effectiveness. However, restricting the flap rate did reduce the gust alleviation, and restricting the flap rate to 0.25 rad/sec actually caused the alleviation system to increase the vertical acceleration above that for the no-alleviation situation. Based upon this analysis, rate limiting appears to be rather significant in gust-alleviation systems designed for passenger comfort.
Effects Of Spanwise Variation Of Gust Velocity On Alleviation System Designed For Uniform Gust Velocity Across Span
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Author : L. Keith Barker
language : en
Publisher:
Release Date : 1971
Effects Of Spanwise Variation Of Gust Velocity On Alleviation System Designed For Uniform Gust Velocity Across Span written by L. Keith Barker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Gust loads categories.
Nasa Technical Note
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Author :
language : en
Publisher:
Release Date : 1976
Nasa Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1980
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Aeronautics categories.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1971
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Government publications categories.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Monthly Catalog Of United States Government Publications
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language : en
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Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Government publications categories.
Monthly Catalog Of United States Government Publications Cumulative Index
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1976
Monthly Catalog Of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with United States categories.
Applied Mechanics Reviews
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Author :
language : en
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Release Date : 1972
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Mechanics, Applied categories.
A Flight Investigation Of An Automatic Gust Alleviation System In A Transport Airplane
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Author : Paul A. Hunter
language : en
Publisher:
Release Date : 1961
A Flight Investigation Of An Automatic Gust Alleviation System In A Transport Airplane written by Paul A. Hunter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Elevators (Airplanes) categories.