| This paper studied has discussed based on the FPGA SOPC technology construction missile-mounted navigation system aspect related theory and the technology; The paper union modern navigation system multi-sensor combination missile-mounted navigation system's request, face the project application, uses large-scale platform level FPGA is particularly the core component constructs SOPC embedded not to have the top missile-mounted navigation system. Gyro-free Strap down Inertial navigation System is mainly composed of the accelerometer, this system rejection gyroscope, replaces the gyroscope with the accelerometer to take the inertial survey part, not only this may overcome the top to be unable to withstand the great acceleration impact the shortcoming, moreover system's volume and the power loss are small, reliable higher merit. Uses the SOPC method to design the embedded navigation system on FPGA, changed the present general processor, DSP+MCU(CPLD) form leadership navigation computer design pattern, uses the design pattern which the software and hardware coordinates and may have custom-made the nature more appropriate to suit the mixed navigation system to the handling ability and the connection ability request, has the very strong application value and the broad application prospect.The paper first in analyzes characteristics and so on shell body's finite space, high dynamic, the request navigation system volume small, high reliable in the application demand and so on, timeliness foundations, unifies the non-top inertial navigation theory, has used the GFSINS/GPS combined navigation guidance optimization plan; And from project application's angle embarking, proposed technology designs mixed navigation system's overall plan based on IP the nucleus SOPC on the platform level FPGA component, and has given the system simulation confirmation strategy and the SOPC navigation system's top layer hardware architecture.Part then ,In view of the shell body flight process in the inertial navigation parameter's survey, the paper has completed the non-top inertial survey hardware system design, including the sensor structure disposition, the signal recuperation, the signal gathers and processes electric circuit's design to realize, and has considered the antijamming and so on key technologies.Then, in view of the GFSINS/GPS mixed navigation system to aspect and so on function, connection requests, studies the CPU peripheral device to realize the plan with emphasis, and using Altera FPGA integrated development environment Quartus II and hardware description language VHDL, has realized the ADC sampling controller, the GPS connection unit and so on from the definition logic circuit's design, completes to the acceleration instrument, GPS signal gathering, the filter and the buffer, and through confirms it to various modules simulation to satisfy the design requirements.Has studied the navigation computer hardware board card, including chip shaping and hardware schematic diagram design; In order to raise the sampling speed and the precision, has realized FIR in FPGA (limited impulse response) the digital filter's hardware design, and through confirms it to the simulation to satisfy the design requirements.Finally, in view of the SOPC construction's embedded system, its software construction and the system initialization step with uses in common the personal computer to have the very big difference, applies Altera integrated development environment SOPC Builder and IDE, has completed navigation system's NiosII construction and the software part design.The present paper in the research based on the FPGA SOPC technology construction missile-mounted guidance system application aspect, has carried on a more comprehensive analysis, to guidance system's various modules which designs carry on the simulation confirmation to achieve the predetermined goal, the proof are feasible, has made some beneficial progresses, has provided certain foundation for the further project application and the development. |
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