The magnetic suspension and balance system for the Ø 85    mm suction-type supersonic wind tunnel at Tohoku University, which is capable of magnetically suspending the model against the starting and stopping loads without mechanical support, has been successfully developed. To implement fast control system response, a new optical position sensor was built and calibrated. The 1.24 kHz synchronous control system, composed of a proportional-integral controller plus a double-phase advancer, made the rise time of a step response 30% faster than the Japan Aerospace Exploration Agency’s existing magnetic suspension and balance system. The frequency characteristics of the magnetic field intensity formed in the test section were measured and improved to achieve faster performance of the control system. The control simulation of the magnetic suspension and balance system for the Ø 85    mm suction-type supersonic wind tunnel at Tohoku University indicated the appropriate conditions, such as increasing the moment of inertia of the model and setting a cutoff frequency of 100 Hz, and led to successful magnetic suspension tests.


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    Title :

    Development of Magnetic Suspension and Balance System for Intermittent Supersonic Wind Tunnels


    Contributors:

    Published in:

    AIAA Journal ; 54 , 4 ; 1277-1286


    Publication date :

    2016-01-04


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Development of a Magnetic Suspension and Balance System for Supersonic Wind Tunnels (AIAA 2014-1312)

    Takagi, Y. / Sawada, H. / Obayashi, S. et al. | British Library Conference Proceedings | 2014


    Magnetic balance and suspension systems for use with wind tunnels

    Covert, Eugene E. / Finston, Morton / Vlajinac, Milan et al. | Elsevier | 1973


    Supersonic wind tunnels

    Keil, C.G. | Engineering Index Backfile | 1960