Research On Initial Alignment Of Vehicles Micro Inertia Navigation System

With the development of the national economic and national defenseconstruction, the inertial navigation application is widespread more and more.Initial alignment of micro Inertia navigation system is a key aspect of inertialnavigation technology and application.people pay more and more attention to highaccuracy and fast initial alignment.This article "Research on Initialalignment of Vehicles Micro Inertia Navigation system", studys systematicallyand all-around the Initial alignment of vehicles micro inertia navigationsystem.The main work done is as follows:First ,the related knowledge of micro Inertia navigation system areintroduced briefly.Then ,the micro inertia navigation system hardware andsoftware composition are introduced in detail.It studies technology of digital filter. It has been proved to be effectivethat noise of system is reduced and performance of system is advanced by analysisof data.This paper study the technology of demarcate experiment of MIMU(MicroInertial Measurement Unit, The demarcate scale coefficient of three-dimensionalgyroscope and the coefficient of cross-coupling error, the scale coefficientof three-dimensional accelerometer and cross-coupling error are all given. Itmakes the model of AR(1) for excursion of gyroscope.It studys the basic principleof digital magnetic compass,and the error of magnetic measurement system:hemanufacture error,the wiring error, the posture signal error and the caused byiron.It infers method of error analysis for the magnetic system,and gives theplan for the error compensation.Finally, it studies question that discusses the initial alignment of Microinertial system by Kalman filtering of magnetic heading and MIMU integratedsystem.