FIELD: measurement technology.
SUBSTANCE: angle of deviation of pendulum is registered relatively equilibrium position at free damped vibrations by means of laser and photoreceiving array. Vibrations are excited till reaching amplitude which has value belonging to amplitude-dependent area. Received curve is selected to several parts. Any part is approximated by exponentially damped sinusoid. Damp and frequency factor amplitude dependences are built. Those dependences are approximated by polynomial functions and values of factor of damping and vibration frequency at zero amplitude are approximated by means of extrapolation of amplitude dependences.
EFFECT: improved precision of measurement.
3 dwg
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