INFLUENCE OF GYRO-INCLINOMETER SENSOR ERRORS ON THE ACCURACY IN DETERMINING HOLE PARAMETERS

摘要

A gyro-inclinometer (GI), a hole-navigation device of continuous action, which is used for determining the spatial position of a hole with high accuracy (from several meters up to a decimeter for a hole length of up to three kilometers), is considered. The effect of regular errors of the GI sensors on the results obtained is examined. The GI inertial unit contains three single-axis angular velocity sensors (AVS) and a sensor of linear velocity along of a hole, Correlations for errors in the measured hole parameters are obtained in the form of quadratures. These errors depend on the errors of the GI sensor and on the kinematics of its travel in the hole. Analytical expressions for the kinematical and geometrical errors of the GI navigation system are derived in the form of analytical expressions for certain longitudinal profiles (vertical and spiral) of a hole.