Golovach S. Methods of testing and calibration strapdown inertial navigation systems

This research focuses on the methods of testing and calibration strapdown inertial navigation system (SINS). The aim of the thesis is to develop and improve methods of testing and calibration SINS that provide the accuracy and efficiency of determining the parameters of deterministic and stochastic processes in their output signals. There have been performed information-analytical review for the problem of testing parameters for the functioning of SINS with the required accuracy in static conditions. Theoretically discussed methods for obtain parameters SINS during testing in different conditions. In particular, the paper describes the methods of determining the parameters of stochastic processes signals in high precision laser gyroscopes and pendulum accelerometers during the static test. On the basis of Allan variance developed improved test methods by using wavelet for filtering signals of laser gyroscopes, and by using simulation temperature self heating for correction accelerometers signals. The method for determined and compensation temperature error for the triaxial accelerometers unit under SINS construction was developed. The advantage of the proposed method is a significant reduction in the testing time by low requirements for testing equipment. The algorithms of error correction temperature showed high efficiency and practical value during application in the studied sensors. Stand calibration methods in this study was developed on the base of scalar calibration method and includes calibration method for triaxial accelerometer unit and triaxial laser gyroscope unit. For confirm the efficiency of static calibration correction algorithms were developed. The results of practical application the methods of stand calibration in real inertial units proved the efficacy and practical value of the developed method calibration SINS.