Design And Implementation Of Hardware Platform Of Missile Integrated Navigation System Based On TMS320C6748

With the changes in the world war situation and the frequent local wars,the precise guidance of weapons and ammunition has become a hot research topic in various countries.At present,the integrated navigation system based on INS/GPS is favored because it can make up for the shortage of individual navigation systems.However,due to the harsh application environment of the integrated navigation system,the integrated navigation system must be able to collect and process data in real time.The data acquisition and processing capabilities are inseparable from the hardware platform.Therefore,higher requirements are placed on the hardware platform design of the system.According to the application environment of the missile and the functional requirements of the integrated navigation system,a small hardware platform based on the integrated navigation system of TMS320C6748 and XC6SLX16 is designed.This thesis first analyzes the application environment and functional requirements of the missile-mounted integrated navigation system,and determines the overall design architecture of the hardware system using DSP and FPGA as the core data processing chip and control chip respectively.The circuit design and software program design of each module in the integrated navigation system are introduced in detail;Then the thesis analyzes the mechanism and harm of the data asynchronous problem between the inertial devices in the integrated navigation system and the IMU/GPS data asynchronous problem.The high dynamic trajectory simulation test under matlab is carried out for the data asynchronous problem between inertial devices.The experiment proves that even the millisecond level error will have a hundred-meter effect on the trajectory of the projectile,verifying the necessity of data synchronization.The inertial data synchronization scheme is proposed,and a detailed error compensation method is proposed for the IMU/GPS data synchronization problem.Finally,the calibration experiment of the micro inertial measurement unit proves that the hardware platform designed in this thesis can realize the normal data acquisition,navigation solution and storage functions;Through multiple inertia vehicle test and multiple integrated navigation vehicle test,it is proved that the proposed inertial data synchronization scheme and IMU/GPS data synchronization scheme can effectively reduce the navigation error of the system and improve the navigation accuracy of the combined system.Multi-type experiments show that the integrated navigation system designed in this thesis can meet the design requirements and has certain engineering application value.