Design And Implementation Of Inertial Navigation Alignment Simulation System Based On Qt Platform

The integration of Strapdown Inertial Navigation System(SINS)of Alignment algorithm design and performance testingIs require a large amount of experimental data,however,testing on the basis of real products will inevitably lead to long system development cycles and increased costs.Therefore,the simulation of inertial navigation system design simulation system is a hot topic,the simulation experiment has become a popular method of studying the inertial navigation.In order to provide technical support for inertial alignment experiments in simulation paltforms,this thesis carries out the design and research of Inertial Navigation Alignment Simulation Platform based on Qt platform.The main contents are as follows:Firstly,the operating principle of SINS will be explained,then according to the actual function and performance requirements and design principles of system platform,to design the research program of simulation platform.Based on the actual INS alignment work,when the GPS fails and the long-term operation accuracy of the inertial navigation system will be reduced,the SAR on the mothership is activated for inertial navigation alignment.This article uses SAR to assist with SINS alignment,Taking the aircraft carrier navigation and alignment system as the research object,to make the transfer alignment algorithm come true.Secondly,In order to suit the simulation requirements of the system in different motion trajectories,this paper analyzes the mathematical characteristics of the different motion modes of the aircraft,and generates the trajectory of the carrier by designing the motion trajectory generator.The trajectory of the vehicle is generated by the method of simulation and the inertial navigation simulation data corresponding to the trajectory is obtained,which provides a data source for the simulation of transmission alignment.In order to improve the precision of the data,the boundary condition method of the adjacent modules is also proposed in the process of superimposing the moving track module of the aircraft carrier due to the parameter mutation.Achieved the smooth convergence of the module movement,and validity of this method is verified through simulation.Thirdly,according to the modular and object-oriented design idea,this paper analyzes the function and performance of the simulation system,and realizes the simulation interface design based on C ++ programming language,including motion module,real-time display and curve drawing module of navigation information,simulation verification module,Data storage and many other functional modules to complete the simulation system platform to build the entire process.Aiming at the traditional pure digital simulation,this paper constructs the carrier model by using the modeling software 3DS MAX,and uses the graphics library OpenGL to import 3D model into t Qt platform to complete the rendering of the vehicle model texture color and the control of the movement mode to achieve the aircraft alignment process Three-dimensional visual display.Finally,according to the performance analysis and verification of The integration of Strapdown Inertial Navigation System algorithm,in order to make the simulation data correspond to the real-time display of the 3D scene,the real-time transmission of data is realized by using the SIGNAL protocol.For the inertial navigation system under different motion conditions The simulation experiments were carried out to verify the accuracy and feasibility of the Integration of Strapdown Inertial Navigation System.