Research Of Influential Factors Of Attitude Algorithm Based On Magnetic Sensor For Projectile

Because of geomagnetic has many advantages,it is used for missiles attitude measuring.There are various factors will affect the attitude measurement,mainly including attitude calculating method and magnetic survey data.So it need to be analyzed and researched.On the basis of triaxial magnetic resistance sensor,set up the model of the attitude model.According to the features of yaw Angle changes,designs the algorithm of attitude algorithm based on the Newton iteration method.Through the simulation of static posture simulation and full trajectory posture attitude algorithm method,the simulation results show understanding calculate method accuracy and real-time performance.The geomagnetic measurements influence factors are analyzed,including the sensor itself error,sensor installation error,projectile ferromagnetic.Established the sensor error model,the sensor installation error model and error model projectile hard magnetic materials.In order to establish the error model of the projectile soft magnetic materials,this article USES the ANSYS simulation software analyze magnetic shielding the influence law of projectile soft magnetic materials.Through to the axis of the magnetic field in a different direction Angle of 3D simulation of magnetic field,magnetic field data is an ellipsoid,on the basis of ferromagnetic material error model is established.According to the error model of magnetic survey data of comprehensive error ellipsoid model was established,and the error compensation with the coefficient of ellipsoid.To test and verify the theoretical results of the above,this paper designs the magnetic missiles and attitude measurement and control system,through the test results of three groups of different attitude,shows that the magnetic survey data to meet the above error ellipsoid model.And according to the compensation after the attitude algorithm of the magnetic survey data and calculating results and the theoretical results are basically identical,verify the attitude algorithm method.