The Hardware Design Of Positioning And Navigation Timing Micro System

Positioning,Navigation and Timing(PNT)technology is an accurate description of space and time.With the vigorous development of modern science and technology,people's dependence on PNT information is unprecedented in human history.The PNT technology not only serves the national economy,plays an irreplaceable role in national security and military applications,but also gradually becomes a strategic symble of comprehensive national strength and international status.It has gradually become a strategic sign of comprehensive national strength and international status.In order to solve the vulnerability of Global Navigation Satellite System(GNSS)and improve the quality of PNT services,the key technologies of the PNT system are the deep integration of micro-inertial measurement units,high-precision clocks are regarded as the core devices and GNSS for deep convergence.At present,there is no mature positioning navigation and timing micro-system installed high-precision clock in the market.Therefore,it is of great significance to develop the hardware principle prototype of the positioning and navigation system.In this paper,a scheme of deep integration using high precision CSAC(Chip Scale Atomic Clock),MIMU(Miniature Inertial Measurement Unit)and BDS_GPS dual-mode navigation receiver is a more appropriate choice.In this paper,based on the development of positioning navigation and timing micro-system,the hardware platform based onMIMU/CSAC/GNSS positioning navigation and timing micro-system is designed to solve the satellite signal vulnerability and improve the PNT service quality.The main contents include:(1)Introduction of positioning navigation and timing micro-system.It mainly includes introduction of inertial navigation,introduction of satellite navigation,introduction of chip atomic clock and current situation of positioning navigation and timing micro-system at home and abroad.(2)Overall design of positioning navigation and timing micro-system.The performance requirements of the system and the core technology for a specific analysis of the system according to the overall system hardware design and software design,and gives the system key device selection.(3)Hardware design and implementation of position navigation and timing micro-system.It mainly includes the overall design of the overall hardware structure of the system,the schematic diagram of the system sub-module design,the interface between the system module design and system power circuit analysis and design.(4)Positioning navigation and timing micro-system driver and software design.This section includes DSP-based driver software design,peripheral circuit driver software design,FPGA-based BDS_GPS channel correlator design and integrated software design for positioning navigation and timing micro-system.(5)According to the characteristics of the positioning and navigation timing micro-system hardware platform,a complete simulator test program,sports car filed tests and flight test program are designed.The results of this system are combined with high-precision optical fiber inertial integrated navigation system and mature results for a detailed comparative analysis.