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Extraction Of Aerodynamic Parameters For Aircraft At Extreme Flight Conditions
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Book Synopsis Extraction of Aerodynamic Parameters for Aircraft at Extreme Flight Conditions by :
Download or read book Extraction of Aerodynamic Parameters for Aircraft at Extreme Flight Conditions written by and published by . This book was released on 1985 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The maximum likelihood estimator has been used to extract stability and control derivatives from flight data for many years. This paper briefly discusses the maximum likelihood estimator and the aircraft equations of motion that the estimator uses. The current strength and limitations associated with obtaining flight-determined aerodynamic coefficients in extreme flight conditions is assessed. The importance of the careful combining of wind tunnel results (or calculations) and flight results and the thorough evaluation of the mathematical model is emphasized. The basic concepts of minimization and estimation are examined for a simple computed aircraft example, and the cost functions that are to be minimized during estimation are defined and discussed. Graphic representations of the cost functions are given to help illustrate the minimization process.
Book Synopsis Extraction of Longitudinal Aerodynamic Coefficients from Forward-flight Conditions of a Tilt Wing V/STOL Airplane by : James L. Williams
Download or read book Extraction of Longitudinal Aerodynamic Coefficients from Forward-flight Conditions of a Tilt Wing V/STOL Airplane written by James L. Williams and published by . This book was released on 1972 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A parameter-estimation algorithm was used to extract the longitudinal aerodynamic derivatives from flight data for the XC-142A airplane in a cruise condition. The flight data were the response to a tail-plane doublet input. Results of this study showed that a set of derivatives were determined which yielded a calculated aircraft response in close agreement with the measured response. This calculated response was in much closer agreement with the flight data than the response obtained by using derivatives which were calculated from empirical methods. There were large differences between some of the important derivatives extracted from flight data and those calculated from empirical methods. The reasons for these differences were not identified.
Book Synopsis Aerodynamic Parameters of the Navion Airplane Extracted from Flight Data by : William Tull Suit
Download or read book Aerodynamic Parameters of the Navion Airplane Extracted from Flight Data written by William Tull Suit and published by . This book was released on 1972 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: An iterative method, which is characterized as a maximum-likelihood minimum-variance technique, was used to extract the aerodynamic parameters of a Navion airplane from flight data. The purposes were to compare the results with parameters obtained from wind-tunnel tests and with results obtained by analog matching the same data, and to develop techniques for application of the parameter extraction program. Results from the study showed that the parameter-extraction program can produce aerodynamic parameters which will permit close estimation of the aircraft time histories used in the extraction process. The program determined an estimate of the standard deviations of the states and parameters. These estimates were used to indicate how well the calculated states fit the flight data and the confidence in the values of the estimated parameters. The study also showed that the values of the parameters were affected by the data and mathematical model used during the extraction process. Because of the lack of confidence in the parameters extracted by use of some of the sets of data, several parameters were estimated by other methods. By using a combination of methods, a set of parameters which gave a fit to the data was obtained.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Lateral Static and Dynamic Aerodynamic Parameters of the Kestrel Aircraft (XV-6A) Extracted from Flight Data by : William Tull Suit
Download or read book Lateral Static and Dynamic Aerodynamic Parameters of the Kestrel Aircraft (XV-6A) Extracted from Flight Data written by William Tull Suit and published by . This book was released on 1974 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1989 with total page 1328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog, United States Public Documents by : United States. Superintendent of Documents
Download or read book Monthly Catalog, United States Public Documents written by United States. Superintendent of Documents and published by . This book was released on 1973 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Lateral Aerodynamic Parameters Extracted from Light Data for the F-8C Airplane in Maneuvering Flight by : William Tull Suit
Download or read book Lateral Aerodynamic Parameters Extracted from Light Data for the F-8C Airplane in Maneuvering Flight written by William Tull Suit and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Longitudinal Aerodynamic Parameters Fo the Kestrel Aircraft, XV-6A, Extracted from Flight Data by : James L. Williams
Download or read book Longitudinal Aerodynamic Parameters Fo the Kestrel Aircraft, XV-6A, Extracted from Flight Data written by James L. Williams and published by . This book was released on 1973 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Extraction from Flight Data of Lateral Aerodynamic Coefficients for F-8 Aircraft with Supercritical Wing by : James LaVern Williams
Download or read book Extraction from Flight Data of Lateral Aerodynamic Coefficients for F-8 Aircraft with Supercritical Wing written by James LaVern Williams and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A parameter-extraction algorithm was used to determine the lateral aerodynamic derivatives from flight data for the F-8 aircraft with supercritical wing. The flight data used were the recorded responses to aileron or rudder pulses for Mach numbers of 0.80, 0.90, and 0.98. Results of this study showed that a set of derivatives were determined which yielded a calculated aircraft response almost identical with the response measured in flight. Derivatives extracted from motion resulting from rudder inputs were somewhat different from those resulting from aileron inputs. It was found that the derivatives obtained from the rudder-input data were highly correlated in some instances. Those from the aileron input had very low correlations and appeared to be the more reliable.
Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Download or read book NASA SP. written by and published by . This book was released on 1988 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) by : Xinguo Zhang
Download or read book The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) written by Xinguo Zhang and published by Springer. This book was released on 2019-06-08 with total page 3068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of peer-reviewed papers from the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). The symposium is a common endeavour between the four national aerospace societies in China, Australia, Korea and Japan, namely, the Chinese Society of Aeronautics and Astronautics (CSAA), Royal Aeronautical Society Australian Division (RAeS Australian Division), the Korean Society for Aeronautical and Space Sciences (KSAS) and the Japan Society for Aeronautical and Space Sciences (JSASS). APISAT is an annual event initiated in 2009 to provide an opportunity for researchers and engineers from Asia-Pacific countries to discuss current and future advanced topics in aeronautical and space engineering.
Book Synopsis Extraction from Flight Data of Longitudinal Aerodynamic Coefficients for F-8 Aircraft with Supercritical Wing by : James LaVern Williams
Download or read book Extraction from Flight Data of Longitudinal Aerodynamic Coefficients for F-8 Aircraft with Supercritical Wing written by James LaVern Williams and published by . This book was released on 1974 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1986-05 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
