Calibration of six-component internal strain gage balance

Krishnan, V and Kangovi, S (1980) Calibration of six-component internal strain gage balance. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    A l2mm six-component internal strain gauge balance was13; calibrated for measuring forces and moments acting on an13; afterbody model. The balance sting and the loading fixture to simulate the loading of the balance during wind tunnel tests were designed and fabricated. Data for calibration was generated by using a calibration rig of the NAL O.3m tunnel. A computer program to fit least square curves was developed and used to obtain the calibration constants from the data obtained during calibration. Another program was developed to predict the forces and moments quot;acting on the model from the known balance voltage output and the calibration constants.13; It was found that incorporating only the linear interaction terms was sufficient to predict the axial force to an accuracy of 99.7 percent. This was considered adequate in the afterbody tests where this balance is proposed to be used.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Calibration procedure;Loading system;Readout system
    Subjects: AERONAUTICS > Aerodynamics
    Division/Department: Aerodynamics, Aerodynamics
    Depositing User: M/S ICAST NAL
    Date Deposited: 25 Aug 2006
    Last Modified: 24 May 2010 09:49
    URI: http://nal-ir.nal.res.in/id/eprint/2574

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