Construction of a geographically oriented horizon trihedron in gyroscopic orientation systems intended to aid navigation dead reckoning part 1. Gyroscopic orientation with a correctable pendulum. Implementation in a free gyroscope

Abstract

The paper considers the construction of a geographically oriented horizon trihedron intended to determine a carrier position by navigation dead reckoning. In most cases, gyroscopic orientation with a correctable pendulum (GOCP), the method proposed by the author, is more suited for this purpose than the inertial method. The gist of the new method is that the error in computed coordinates caused by the construction of the horizon plane with the use of accelerometer readings disturbed by the carrier inertial accelerations can be inertialessly corrected due to external velocity aiding. A scheme is proposed for the implementation of high-precision dead reckoning with three accelerometers and a gimballess electrostatic gyro, which is both an example of practical implementation and a prototype of a class of single-gyro orientation systems intended to aid navigation dead reckoning.