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  • Other Sources  (3)
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  • 1
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    The electron Echo 6 mechanical deployment systems (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The Echo 6 sounding rocket payload was flown on a Terrier boosted Black Brant vehicle on March 30, 1983. The experiment requirements resulted in the new design of a rocket propelled Throw Away Detector System (TADS) with onboard Doppler radar, a free-flyer forward experiment designated the Plasma Diagnostic Package (PDP), and numerous other basic systems. The design, developmental testing, and flight preparations of the payload and the mechanical deployment systems are described.
    Keywords: MECHANICAL ENGINEERING
    Type: The 18th Aerospace Mech. Symp.; p 263-276
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The sensitivity to parametric variation in direct minimization techniques (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Solutions of some objective analysis techniques are known to depend upon the subjective values of internal parameters. The change in the solution per change in the parameter is the sensitivity. Parameters with low sensitivity can be varied with large increments during preliminary searches for near-optimal parameter values. Only terms with high sensitivity must be thoroughly investigated once the parameters are determined to be close to optimal. Both absolute and relative sensitivities are discussed and a sensitivity-based definition of the solution uncertainty is proposed. The sensitivity of direct minimization analysis to parametric variation is evaluated using a set of 'response functions' that characterize different aspects of the solution. It is shown that solutions of direct minimization techniques have low absolute sensitivity. Two examples are used to illustrate the usefulness of the technique. Both involved measurements of air-sea quantities (e.g., wind stress and latent heat flux) from a variety of data sources using a direct minimization technique. The examples demonstrate that sensitivity analysis is capable of quantifying regional sensitivities as well as indicating the magnitude and relationship between the various parameters.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review (ISSN 0027-0644); 122; 7; p. 1632-1639
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Aeroelastic analysis of sounding rocket vehicles. (1973)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Rigid-body stability analysis can be extended to treat aeroelastic effects by allowing the structure to deflect under airloads as a simple beam. Linear aerodynamics and the bent shape then define the airloads. The resulting equations are indeterminant but can be manipulated to show the basic aeroelastic effects of flexibility, dynamic pressure, and angle of attack. The FLMD quasi-static program can solve these equations by iteration and compute stability for a specific vehicle/payload combination. Given the proper distributed inputs for the instant of time investigated, the FLMD predicts the center of pressure and related parameters, such as static margin.
    Keywords: SPACE VEHICLES
    Type: AIAA PAPER 73-284 , Sounding Rocket Technology Conference; Mar 07, 1973 - Mar 09, 1973; Albuquerque, NM
    Format: text
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    NASA TECHNICAL REPORTS
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