Active Vibration Control of Model Support Structures for Wind Tunnel Applications

Senthil Kumar, P and Kamath, GM (2008) Active Vibration Control of Model Support Structures for Wind Tunnel Applications. Project Report. National Aerospace Laboratories, Bangalore.

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    Abstract

    This report presents an active vibration control methodology of a wind tunnel model support structure 1 I using pie2oelectric actuators. The proposed methodology is useful in practical applications where the system to be controlled is difficult to model due to the presence of complex boundary conditions. The impedance matching control technique uses a power flow approach wherein the controller is designed such that the power flow into the structure is minimized. The system transfer function is obtained from I the experimental collocated actuator/sensor pair data using Eigen Realization Algorithm (ERA). The controller is designed for the system transfer function according to impedance matching theory. The above approach is targeted towards the vibration control of wind tunnel stings, which suffer from flow-induced vibration. A wind tunnel model support structure is designed and fabricated for this study. The real time implementatior. of the impedance matching controller was conducted using dSPACE@ Digital Signal Processor (DSP) card md MariabiSimuiink. These experiments showed that it is feasible to generate sufficient energy in the sting model using the stack actuators. A closed loop impedance control in real-time is irnpiemented significant in vipiotions are observed.

    Item Type: Proj.Doc/Technical Report (Project Report)
    Uncontrolled Keywords: Wind Tunnel, Impedance Control, ERA, Piezo Stock Actutor, dSCPACE control desk, Matlab/Simulink
    Subjects: CHEMISTRY AND MATERIALS > Composite Materials
    Division/Department: Advanced Composites Division, Advanced Composites Division
    Depositing User: Ms Indrani V
    Date Deposited: 27 Jul 2011 10:51
    Last Modified: 27 Jul 2011 10:51
    URI: http://nal-ir.nal.res.in/id/eprint/9668

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