CORRECTION SYSTEM OF SEA GRAVIMETER GYROSTABILIZER Russian patent published in 2005 - IPC

FIELD: two-axes gyrostabilizers of sea gravimeters.

SUBSTANCE: proposed correction system includes two identical channels; connected in series in each channel are: accelerometers, subtracter, integrator, aperiodic member isodrome unit, second aperiodic member and gyroscope torque sensor. Output of aperiodic member is connected with second input of subtracter by means of feedback amplifier. Accelerometer output is also connected with input of high-frequency filter whose output is connected with control unit input by means of spectrum meter. Control unit output is connected with second aperiodic member. Availability of subtracter, integrator, aperiodic member and back-feed amplifier performing function of low-frequency filter of second order smoothes high-frequency component of accelerometer signal, thus enhancing accuracy of gravimeter stabilization and consequently accuracy of measurement of acceleration of gravity. Control unit changes time constant of aperiodic member according to change of prevailing frequency of motions in such way that phase shift between horizontal accelerations of motions and error of stabilization is accurately minus 270 deg. which enhanced accuracy of measurement of acceleration of gravity by gyrostabilized gravimeter.

EFFECT: enhanced accuracy of measurement.

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