Design of singlewheel gyrocompass with correction
Abstract
The feasibility of reducing the intercardinal deviation as well as other dynamic errors of a singlewheel gyrocompass with correction is examined, considering that the time constant of the horizontal indicator must not be long in the case of highfrequency azimuthal oscillations. A system of four differential equations of motion with two correcting torques and two time constants is written for a gyrocompass mounted on a rocking base. This system in angular variables is transformed into one in deviations of the angular variables from their values in the position of static equilibrium. The first approximation of this system yields a simple characteristic equation, its second approximation yields a simple expression for the intercardinal deviation. An analysis of the solution and its stability reveals that the time delay in the horizontal indicator can be shortened while a time delay is introduced into the corrective network. A further advantage is that, unlike the time constant of the horizontal indicator, the time constant of the torque correction can be varied during operation of the gyrocompass.
 Publication:

USSR Rept Eng Equipment JPRS UEQ
 Pub Date:
 February 1984
 Bibcode:
 1984RpEE........45R
 Keywords:

 Correction;
 Design Analysis;
 Deviation;
 Gyrocompasses;
 Azimuth;
 Delay;
 Differential Equations;
 Equations Of Motion;
 Gyroscopic Stability;
 Torque;
 Instrumentation and Photography