Research On High Precision Transfer Alignment Method On A Moving Base Of Airborne Dispenser

With the fast development of science,the high accuracy standoff weapon has become an important part of the modern warfare due to its small human casualties and high cost-effectiveness.In order to airborne guarantee the accuracy of projection and guidance,this thesis takes airborne dispenser as the research object,and then the high precision transfer alignment on a moving base is studied deeply,the concrete content is as follows:Firstly,this thesis conducts an in-depth investigation on the airborne disperser,inertial navigation equipment,transfer alignment method of dynamic base and non-linear filtering method at home and abroad,gives their research status,compares and analyzes the advantages and disadvantages of various methods,and provides reference for the design of the subsequent airborne disperser transfer alignment filter.Secondly,the thesis conducts the thorough research on the model of inertial navigation system.In the thesis,the measurement model of inertial navigation system is established,including gyroscope measurement model and the model of accelerometer measurement,the mechanical arrangement of inertial navigation system was deduced,and then the error propagation model of strapdown inertial navigation is given,including attitude error equation,velocity error and position error equation.In addition,the mathematical simulation of inertial navigation calculation is carried out to verify the accuracy of the inertial navigation model.Since the truncation error of the extended Kalman filter is big and the Jacobi matrix is hard to solve,the paper proposed the unscented Kalman filter and the high-degree cubature Kalman filter based on the Gaussian filtering framework.After that,these two filters are applied to the transfer alignment of the airborne dispenser,the simulation results demonstrate that the high-degree cubature Kalman filter has the higher accuracy.In addition,the thesis analyzes the influence of the vehicle maneuvering form on the transfer alignment accuracy,which is of great significance for improving the transfer alignment performance in the following engineering practice.