Ring laser gyroscope

About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.

Hemispherical Resonator Gyroscope Accuracy Analysis Under Temperature Influence

Abstract: Frequency splitting of hemispherical resonator gyroscope will change as system operating temperature changes. This phenomenon leads to navigation accuracy of hemispherical resonator gyroscope reduces. By researching on hemispherical resonator gyroscope dynamical model and its frequency characteristic, the frequency splitting formula and the precession angle formula of gyroscope vibrating mode based on hemispherical resonator gyroscope dynamic equation parameters are derived. By comparison, gyroscope precession angle deviation caused by frequency splitting can be obtained. Based on analysis of temperature variation against gyroscope resonator, the design of hemispherical resonator gyroscope feedback controller under temperature variation conditions is researched and the maximum theoretical fluctuation of gyroscope dynamical is determined by using a numerical analysis example.

Implementation of digital detection scheme for fiber optic gyroscope

Abstract: IMPLEMENTATION OF DIGITAL DETECTION SCHEME FOR FIBER OPTIC GYROSCOPE Serdar Öğüt M.S. in Electrical and Electronics Engineering Supervisor: Prof. Dr. Orhan Aytür August, 2013 Fiber optic gyroscope (FOG) is a kind of inertial sensor that can be used for navigation, control and guidance of air, naval, land and space vehicles. A FOG measures rotation rate dependent on phase difference between two counterpropagating light waves through a rotating fiber loop. In this thesis, the main principles of FOG such as Sagnac effect and reciprocity are described. The optical scheme consists of a broadband light source, a coupler, a polarizer, an integrated optic chip and a fiber coil, is developed and established. The modulation and demodulation techniques used in FOG are also investigated in detail. The digital detection system is built with a photodetector, a transimpedance amplifier, a voltage amplifier and a data acquisition (DAQ) system. A transceiver module and an FPGA processor are the components of DAQ system. The modulation and demodulation processes are implemented by using LabVIEW FPGA module. The program created in LabVIEW environment allows to characterize scale factor and phase modulator parameters. Rotation rate measurements are performed and analyzed by Allan variance method. The impacts of different noise types to the performance of FOG are analyzed. Angle random walk (ARW), noise component to determine short-term accuracy of FOG, is reduced by integration of spike-free signal. We also show that we obtain similar noise parameters even if the output power of the system is very low. It is proven and tested that ARW is reduced by the optimization of modulation depth. Theoretical and experimental results are quite consistent at every stages of the work.

Diode-pumped solid-state ring laser gyroscope

Abstract: We report achievement of a novel type of gyroscope based on CW diode-pumped Nd- YAG crystal ring laser with stabilization of bi-directional emission. The very rich dynamics of such a device is described and explained in terms of competition between different coupling effects in the laser.

Laser gyroscope reliability testing system and method

Abstract: The invention belongs to an inertia measurement technology and particularly relates to a laser gyroscope reliability testing system and method. The laser gyroscope reliability testing system comprisesa temperature stress application device (2), an electric stress application device (3), a control circuit (4) and at least one laser gyroscope (1), wherein the at least one laser gyroscope (1) is arranged in the temperature stress application device (2) and electrically connected with the electric stress application device (3), and the control circuit (4) is electrically connected with the at least one laser gyroscope (1) and the electric stress application device (3). The provided laser gyroscope reliability testing system and method are low in cost and short in time consumption, and productperformance is objectively evaluated.