A closed loop control system for the forced oscillation mechanism for Pitch-yaw derivatives

Narayan, G and Shiela, Srinivasan (1987) A closed loop control system for the forced oscillation mechanism for Pitch-yaw derivatives. Project Report. National Aerospace Laboratories, Bangalore.

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    Abstract

    The design and development of a closed loop control system for the forced oscillation mechanism for the dynamic stability tests in the 1.2m trisonic wind tunnel is discussed in detail. The control system design is based on individual closed loop control for phase tracking/control and amplitude control and the amplitude control loop being switched into action once the system has tracked and locked on to its natural or resonant frequency of oscillations. The control system is integrated with the tunnel control logic for an automatic operation for setting the model into an initial reference frequency of oscillations and for switching in the phase, control loop after a preset delay. A brief discussion on the bench tests and wind tunnel tests along with some typical test results are also presented.

    Item Type: Proj.Doc/Technical Report (Project Report)
    Uncontrolled Keywords: Dynamic stability;Forced oscillation;Resonant frequency; Forcing function response;Closed loop control of phase and amplitude;Phase locked loop;Voltage controlled Oscillator; Multiplier
    Subjects: AERONAUTICS > Aerodynamics
    Division/Department: Aerodynamics, Aerodynamics
    Depositing User: Smt Bhagya Rekha KA
    Date Deposited: 01 Oct 2012 09:53
    Last Modified: 01 Oct 2012 09:53
    URI: http://nal-ir.nal.res.in/id/eprint/11040

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