The aim and the features of master program “Smart laser navigation systems” in MIEM of NRU HSE are described. Participation of research and development institute “Polyus” named by M.F.Stelmakh in creation and fulfillment of the master program is considered as an approval of actuality of the suggested applied education concept for Russian renewed technologies.
The methods of increasing the accuracy of inertial measurement units (IMU) on Zeeman laser gyros and quartz accelerometers are considered. Design solutions for the rigid installation of the IMU components with the exact reference of the measurement axes and also for IMU maintainability are presented. The principles of quasifourmode Zeeman laser gyro, mathematical algorithms, providing the laser gyroscope drift compensation, and algorithms to compensate errors of the accelerometers with periodic calibration of the analog-to-digital converters are described.
The problems of development of Zeeman quasifourmode laser gyroscope mathematical description and software, providing the full compensation of drift magnetic component and the thermal and time correction of the drift nonmagnetic component, are described.
The laser gyros operating in wide temperature range need in the effective correction of the drift. The paper is devoted to the investigation of the physical reasons of time and temperature drifts of Zeeman laser gyro with periodic realignment of the laser longitudinal generation mode with the light wave opposite circular polarization. It is designated that gyro drift can be divided into magnetic and non-magnetic components having different nature and provides significantly different contribution to the final error. The expression of total error depending on the gyro operation mode is presented. The reasons of magnetic and non-magnetic drifts are described and optimal algorithmic methods of their compensation are proposed both with initial calibration and without it. Experimental results for several Zeeman laser gyroscopes with drifts typical values are analyzed.