EXPERIMENTAL DETERMINATION OF GYRO DYNAMIC PARAMETERS OF A TYPICAL IR-SEEKER

Document Type : Original Article

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Egyptian Armed Forces.

Abstract

The experimental identification of the dynamic parameters of the IR-seeker gyroscope is essential for the evaluation of the relative magnitudes of the different dynamic error sources and the seeker tracking capability.The gyroscope dynamic parameters include cross-axis spring rate, viscous damping coefficient of rotor about spin axis, magnetic torque damping, pendulous unbalance along spin axis, direct axis spring rate, and the mechanical viscous damping.The response of the system was measured experimentally due to a given finite input. The amplitude of the precession torque due to control current was determined. The numerical solution, of the seeker dynamic equations, is introduced based on the values of the parameters that are experimentally determined. The numerical results are compared with the experimental results for different conditions. The results of the numerical solution with changing the modeling parameters are introduced to predict the system response in each case.

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