Method for simultaneously compensating scale factor and zero offset of optical fiber gyroscope by one-time temperature experiment

Abstract

The invention discloses a method for simultaneously compensating a scale factor and a zero offset of an optical fiber gyroscope by a one-time temperature experiment. The method comprises the following steps: (1) adjusting the temperature of an incubator, rotating the gyroscope clockwise and anticlockwise when the temperature reaches respective set temperature values, and acquiring temperature data acquired by a temperature sensor in the gyroscope in real time and data which correspond to the temperature and are output by the gyroscope in the whole process of switching on and switching off the incubator; (2) processing the temperature data and the data output by the gyroscope according to a simultaneous scale factor and zero offset compensation algorithm, and obtaining a temperature compensation coefficient matrix; (3) compensating the output of the gyroscope according to the temperature compensation coefficient matrix. According to the compensation method provided by the invention, the one-time temperature experiment is designed to simultaneously compensate the scale factor and the zero offset of the optical fiber gyroscope; a relation between a digital value output by the gyroscope and an input angle speed is directly expressed, so that the compensation coefficient matrix is obtained; therefore, the inaccuracy, which is caused by a zero offset error and the like, of compensation of the scale factor is avoided; furthermore, the temperature error of the gyroscope can be effectively compensated, and the method can save the experiment cost and is higher in practical significance.

Description

technical field [0001] The invention belongs to the field of fiber optic gyroscopes, and more specifically relates to a method for simultaneously compensating the scale factor and zero bias of fiber optic gyroscopes through a temperature experiment. Background technique [0002] The fiber optic gyroscope is an angular rate sensor based on the Sagnac effect. Due to its low cost, simple process, high reliability, and strong shock and vibration resistance, its application prospects have attracted much attention and it has become one of the mainstream sensors. However, the main components that make up the fiber optic gyroscope, such as fiber optic rings and light sources, are more sensitive to temperature, which causes the output of the fiber optic gyroscope to be greatly affected by temperature, resulting in gyroscope temperature errors. Therefore, the compensation for the temperature error of the fiber optic gyroscope has attracted extensive attention. [0003] The temperature...

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Problems solved by technology

[0004] Aiming at the defects of the existing compensation methods, the present invention provides a method for compensating the scale factor and zero bias of the fiber optic gyroscope at the same time by using a temperature experiment. The purpose is to effectively compensate the errors of the scale factor and zero bias caused by temperature, and reduce the Experimental cost, improved accuracy of compensation

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