Back to Search
ISBN 9798672452982 is currently unpriced. Please contact us for pricing.
Available options are listed below:

Atmospheric Turbulence Modeling for Aero Vehicles: Fractional Order Fits

AUTHOR Administration (Nasa), National Aeronaut
PUBLISHER Independently Published (08/05/2020)
PRODUCT TYPE Paperback (Paperback)

Description
Atmospheric turbulence models are necessary for the design of both inlet/engine and flight controls, as well as for studying coupling between the propulsion and the vehicle structural dynamics for supersonic vehicles. Models based on the Kolmogorov spectrum have been previously utilized to model atmospheric turbulence. In this paper, a more accurate model is developed in its representative fractional order form, typical of atmospheric disturbances. This is accomplished by first scaling the Kolmogorov spectral to convert them into finite energy von Karman forms and then by deriving an explicit fractional circuit-filter type analog for this model. This circuit model is utilized to develop a generalized formulation in frequency domain to approximate the fractional order with the products of first order transfer functions, which enables accurate time domain simulations. The objective of this work is as follows. Given the parameters describing the conditions of atmospheric disturbances, and utilizing the derived formulations, directly compute the transfer function poles and zeros describing these disturbances for acoustic velocity, temperature, pressure, and density. Time domain simulations of representative atmospheric turbulence can then be developed by utilizing these computed transfer functions together with the disturbance frequencies of interest. Kopasakis, George Glenn Research Center NASA/TM-2010-216961, E-17566 WBS 984754.02.07.03.20.02 ATMOSPHERIC TURBULENCE; FLIGHT CONTROL; ENGINE CONTROL; DYNAMIC STRUCTURAL ANALYSIS; DYNAMIC RESPONSE; FREQUENCIES; PROPULSION; SIMULATION; SPECTRA
Show More
Product Format
Product Details
ISBN-13: 9798672452982
Binding: Paperback or Softback (Trade Paperback (Us))
Content Language: English
More Product Details
Page Count: 34
Carton Quantity: 120
Product Dimensions: 8.50 x 0.07 x 11.02 inches
Weight: 0.23 pound(s)
Country of Origin: US
Subject Information
BISAC Categories
Reference | Research
Reference | Space Science - General
Descriptions, Reviews, Etc.
publisher marketing
Atmospheric turbulence models are necessary for the design of both inlet/engine and flight controls, as well as for studying coupling between the propulsion and the vehicle structural dynamics for supersonic vehicles. Models based on the Kolmogorov spectrum have been previously utilized to model atmospheric turbulence. In this paper, a more accurate model is developed in its representative fractional order form, typical of atmospheric disturbances. This is accomplished by first scaling the Kolmogorov spectral to convert them into finite energy von Karman forms and then by deriving an explicit fractional circuit-filter type analog for this model. This circuit model is utilized to develop a generalized formulation in frequency domain to approximate the fractional order with the products of first order transfer functions, which enables accurate time domain simulations. The objective of this work is as follows. Given the parameters describing the conditions of atmospheric disturbances, and utilizing the derived formulations, directly compute the transfer function poles and zeros describing these disturbances for acoustic velocity, temperature, pressure, and density. Time domain simulations of representative atmospheric turbulence can then be developed by utilizing these computed transfer functions together with the disturbance frequencies of interest. Kopasakis, George Glenn Research Center NASA/TM-2010-216961, E-17566 WBS 984754.02.07.03.20.02 ATMOSPHERIC TURBULENCE; FLIGHT CONTROL; ENGINE CONTROL; DYNAMIC STRUCTURAL ANALYSIS; DYNAMIC RESPONSE; FREQUENCIES; PROPULSION; SIMULATION; SPECTRA
Show More
Paperback