Research On Temperature Modeling And Compensating Of Ring Laser Gyroscope Strapdown Inertial Navigation System

As the high and new technology weapons becoming more and more important in wars, the work environment for strapdown inertial navigation system (SINS) varies as well. How to constantly suply accurate and steady out for navigation a hard task for the investigation on SINS. When SINS is working, the thermal environment in it is fuzzy and varying, and the thermal effort of the units in the system differs from each other. Therefore this make the investigation on thermal effort of SINS become more difficult. At the beginning of the investigation, we make some analysis on the origin of thermal effort and the thermal effort modal of accelerometers and gyros, then a thermal calibration technique is carried out.With analysis on the IO modal of gyros, a polynomial modal for gyro bias, scale factor and misalignment is carried out. On the basis of this, a calibration technique is investigated.After studying the IO modal and thermal characteristics of accelerometers, a polynomial modal for accelerometers bias, scale factor and misalignment is carried out. On the basis of this, a calibration technique is investigated.The paper investigated a calibration technique for themal modal of accelerometers. This calibration technique succeed in carried out a valid thermal modal for accelerometers.After concluding the disadvantages of temperature calibration method, the paper carries out a optimation method for characteristics of temperature model, and the optimation model is investigated. A test for optimation using PSO method is carried out. After that the stability and reliability of the modal have been intensified.