Abstract: The system includes for planar angular measurements a gyro--preferably a laser gyro--and an angle encoder mounted with their sensitive axes coaxially on a turntable shaft, which is rotatably mounted in a case and driven at constant speed with respect to said case. The angular rate should be high enough to operate the laser gyro above the lock-in rate. For spatial angular measurements and navigation three gyros are mounted with their sensitive axes spatially arranged with respect to the turntable shaft to sense the same component of its angular rate. For avaraging errors due to gyro scalefactor and drift, the turntable is mounted on a second shaft with is axis perpendicular to the turntable. The second shaft is provided with a second an coder and a motor rotating the second shaft. The processing of the signal readout of the gyro(s) and encoder(s) allows to increase the accuracy, resolution and bandwidth of angular measurements with respect to a locally fixed basis or to inertial space.

Abstract: The invention relates to a procedure for measuring angles and angular characteristics, i.e. the interdependence between the angular deformations or displacements of structural parts and the acting forces or torques by means of a gyro. In the procedure the measurements can be carried out by means of a single gyro and result in a high measurement accuracy. It requires a repetitious execution of a multitude of measurements and in addition to the registration of measurement data and measurement times, the registration of reference data which are in definite connection with the angles to be measured (R-data). From the differences of the gyro measurement data and the measurement times for equal R-data the gyro measurement errors are computed and compensated accordingly.