The Research Of Accuracy Evaluation Techniques Of Transfer Alignment On Plane Carried Weapon Inertial Navigation System

Accuracy evaluation of transfer alignment technology is an effective evaluation method for evaluating the accuracy and values of transfer alignment algorithm on practical application.As the main way of airborne tactical weapons inertial navigation system’s initial alignment on a moving base,the transfer alignment algorithm has some alignment error because of flexure deformation and other interference factors,which directly affects the response time and accuracy of airborne weapons.Thus,there is a need to obtain reliable and accurate alignment error parameters by accuracy evaluation of transfer alignment technology to evaluate the accuracy of the transfer alignment algorithm.After the initial alignment completed through transfer alignment,the aircraft carries weapons as it flies on.Then comparing accurate datas from reference system with corresponding datas from airborne weapon inertial navigation system,we can accurately evaluate the alignment error in a relatively short period of time.Therefore,the research on transfer alignment accuracy evaluation technology has important reference value on designing and improving transfer alignment scheme reasonably and it has important practical significance for improving the alignment and combat performance of airborne weapon inertial navigation system.According to the characteristics of airborne weapon system,the airborne strapdown inertial navigation system’s transfer alignment and its accuracy evaluation algorithm is studied.The main work of this paper are as follows:Firstly,the typical movement mode of airborne weapon is analyzed and established.The trajectory generator designed for airborne weapon master and slave inertial navigation systems is designed,which provides simulation platform for subsequent transfer alignment and accuracy evaluation algorithm.Secondly,based on the basic principle and the error model of transfer alignment for airborne weapons,combined with the simulation information from trajectory generator,the two matching modes of transfer alignment are achieved and the simulation results are compared and analyzed.Then,the necessity of transfer alignment accuracy evaluation is proposed,establishing foundation for accuracy evaluation process.Furthermore,the design of "velocity and position" accuracy evaluation method and the corresponding Kalman filter are finished based on the relationship between airborne weapon’s transfer alignment and accuracy evaluation.Then the Matlab simulation is completed.Finally,accuracy evaluation method based on fuzzy adaptive algorithm is proposed for the accuracy of accuracy evaluation method declines under the condition of complex noise.Through Matlab simulation,results analysis and comparison,we confirm that the fuzzy adaptive algorithm can effectively improve adaptability of transfer alignment evaluation algorithm and make the accuracy evaluation technology to be possible used in the environment with complex,changeable,enormous observation noise,which improve the airborne weapon SINS alignment evaluation performance.