METHOD OF STABILIZING THE HORIZON OF MAGNETIC COMPASSES

摘要

PCT No. PCT/EP96/03681 Sec. 371 Date Dec. 18, 1997 Sec. 102(e) Date Dec. 18, 1997 PCT Filed Aug. 21, 1996 PCT Pub. No. WO97/08513 PCT Pub. Date Mar. 6, 1997Disclosed is a method of stabilizing the horizon of magnetic compasses. At measuring points measurements are taken of spatial components of the geomagnetic field vector and of an overall acceleration vector that is equal to the difference of the acceleration vector due to gravity and the acceleration vector of the magnetic compass. Taking into account the time rates of change of the measured components, the positional relation of the current horizon of the magnetic compass is determined relative to the stable horizon. Using quality functions that signal the deviation of the new spatial position relative to the one previously defined, an estimation method is used to evaluate the accuracy of the stabilized horizon of the system. A horizon can be produced that is largely unsusceptible to movement-induced accelerations of the device equipped with a magnetic compass.