High Precision Fiber Optic Strapdown Inertial Navigation System Temperature Error Modeling And Error Compensation Technology Research

Optical fiber strapdown inertial navigation system has no rotating components of all solid statestructure, large dynamic range, low energy consumption, strong impact resistance, small volume, noboot process, long life and other advantages, has been widely used in the aerospace, weapons navigation,robot control, oil drilling and the radar and other fields.In the practical application of the fiber-optic strapdown inertial navigation system by the workingenvironment temperature effect leads to a reduced accuracy, in this paper a fiber-optic strapdown inertialnavigation system in" navigation special positioning test " as the background, unfolding temperatureerror modeling and error compensation technology research.This article in view of the fiber-optic strapdown inertial navigation system application as thebackground, puts forward a set of effective temperature modeling and compensation scheme.Experiments proved that the scheme can improve the navigation precision of strapdown inertialnavigation system, has the very high value of Engineering application.Papers start with the fiber optic gyro temperature characteristics of the principle, analysis of internalheat source distribution of the inertial navigation system, to determine the heat source of inertialinstruments affecting mode and effect. To dispose the temperature sensor, in order to obtain thetemperature output can truly reflect the inertial device temperature changes, the relative volume changeof consistency; analysis of inertial navigation system of the calibration parameters temperaturecharacteristics, determine the types of parameters of the compensation mode, as the temperature errormodeling based on.Design of "static and dynamic" integrated temperature compensation scheme, determine the staticmodel and dynamic model between the manner of articulation, determine the application in dynamictemperature compensation temperature related items, and determining method of comprehensivecompensation effect, the temperature compensation scheme is designed as a module of a program,adding to the navigation software, navigation validation.In the first phase of this study based on the results, optimizing the temperature sensor configuration,so that the temperature related changes and improved the gyro output change consistency, moreconducive to modeling the temperature and temperature compensation, optimize the gyro biastemperature compensation scheme, combined with gyro temperature characteristics and temperaturecompensation characteristic of the model has the advantages of simple structure, strong adaptability totemperature model. Finally achieve a better temperature compensation effect.Through fully detailed demonstration, comparison with temperature compensation and not using the temperature compensation system of navigation test, the accumulation of a large number of test data,further verify the effectiveness of temperature model.On the temperature compensation and not using the temperature compensation system for thenavigation test, test data to verify the model ’s validity, test results show that the designed temperaturemodeling and compensation scheme can significantly improve the navigation precision of strapdowninertial navigation system, has the very high value of engineering application.