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IEEE Aerospace and Electronic Systems Magazine

Issue 2 • Date Feb. 1990

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Displaying Results 1 - 4 of 4
  • Fast optical LDA burst analyzer

    Publication Year: 1990, Page(s):3 - 9
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB)

    A method for processing Doppler signals is proposed. The basic idea is to process the signal trace obtained by a transient recorder not numerically, but optically, storing it as an image in a spatial light modulator and obtaining the Fourier transform with the speed of light by the use of coherent laser light. Due to the finite resolution of the transient recorder and the light modulator, the imag... View full abstract»

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  • Measurements, visualization and interpretation of 3-D flows application within base flows

    Publication Year: 1990, Page(s):10 - 18
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (693 KB)

    Experimental investigations of the flow field in the near-wake of axisymmetric afterbodies at an angle of attack of 5 degrees are reported. Models consists of a cylindrical afterbody and a conical boat tail. Measurements were performed by means of a 3-D frequency-shifted laser Doppler velocimeter at a free stream Mach number of 0.5. The tremendous increase of quantitative information obtained with... View full abstract»

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  • An optical angle of attack sensor

    Publication Year: 1990, Page(s):19 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (715 KB)

    A major source of transonic and supersonic wind-tunnel test data uncertainty are angle-of-attack-measurement errors caused by unknown sting and balance deflections under load. Since dynamic loads in pressurized or cryogenic wind tunnels generally exceed those in conventional low-speed atmospheric wind tunnels, the need to account for these distortions during model testing is even more acute. A nov... View full abstract»

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  • Some problems on 'intelligence' of wind tunnel testing

    Publication Year: 1990, Page(s):28 - 32
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (373 KB)

    The characteristics and requirements of intelligent wind-tunnel testing are discussed. A deterministic-structure model and a variable-structure model of intelligence as applied to tests and measurements are proposed. The hardware realization issues are analyzed as well as the problems of evaluating the efficiency of intelligent wind-tunnel testing.<> View full abstract»

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IEEE Aerospace and Electronic Systems Magazine is a monthly magazine that publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments as well as news and information of interest to IEEE Aerospace and Electronic Systems Society members.

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Maria Sabrina Greco
Dept. of Information Engineering
University of Pisa
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