Strapdown Inertial Navigation System Based on Dry Tuned Rotor Gyro

Abstract

Background. Modern strapdown inertial navigation systems based on ring laser and fiber-optic gyroscopes, have large size, weight and cost. This makes them difficult to use in navigation systems for small objects. We investigate the accuracy of the strapdown inertial navigation system based on dry tuned gyroscopes, depending on the sensors characteristics and parameters of the base movement.Objective. Development of navigation system designs based on using dry tuned gyroscopes as the angle sensors and the evaluation of its accuracy.Methods. Compilation of mathematical and software models of strapdown navigation system based on Poisson kinematic equation and Euler orientation vector. Input information to guide the algorithms used in the form of projections of the angular velocity from gyroscopes, installed in the system. Integration of orientation equations is performed using the Runge–Kutta methods.Results. System errors for different values of the parameters of gyroscopes and motion base are determined.Conclusions. The use of dry tuned gyroscopes in small strapdown inertial navigation systems can significantly reduce their weight, size and cost saving with satisfactory accuracy.