Research On Hardware Design And Key Technologies Of Missile-borne Micro-integrated Navigation Syste

In the development of national defense weapon guidance,low-cost,rapid,and precise strikes have increasingly become the trend of weapon guidance.Unguided shells have the advantages of strong strike power,low price,simple and convenient launch system,and strong maintainability on the battlefield.However,it has obvious shortcomings such as low strike accuracy,short range,and low damage efficiency.Therefore,the guided transformation of unguided projectiles is an important method and means to improve its strike accuracy.The missile-borne micro-miniature integrated navigation system based on the micro-inertial measurement unit,the multi-band satellite navigation system joint positioning unit,and the external navigation sensor relies on its advantages of miniaturization,low power consumption,and high navigation accuracy in the guidance of unguided projectiles.The field occupies a place and has become a hotspot for many researchers at home and abroad to study first.This article uses a key national defense research project as the background to solve the problems of MEMS-SINS(Micro Electromechanical System Strapdown Inertial Navigation System)long-term low accuracy,GNSS(Global Navigation Satellite System)susceptibility to interference,etc.,and improve the navigation and positioning accuracy of guided projectiles.Aim,to design a MEMS-SINS/GNSS/multi-sensor based missile-borne micro-mini integrated navigation system hardware platform;for the highly dynamic flight and working environment of guided projectiles,key technologies such as MEMS-SINS-assisted GNSS method design and research are carried out.The main contents include:(1)Introduction of the missile-borne micro-mini integrated navigation system.Relying on the laboratory project as the research background,this thesis introduces the background and significance of the research of the thesis.According to the research background,the research status and development process of guided projectiles at home and abroad are summarized as well as the functional components of navigation systems commonly used in the process of guidance transformation of unguided projectiles.The research status and development of the integrated navigation system at home and abroad are analyzed.(2)The overall scheme design of the missile-borne micro-mini integrated navigation system.According to the poor working environment and application place of the missile-borne micro-mini integrated navigation system,the functional requirement analysis and navigation technology theory introduction of the micro-mini integrated system studied in this paper are carried out.Based on the navigation technology theory used in this system,the overall software and hardware scheme of the system is designed,and the core device selection and functional resource introduction of the functional components mainly used in the system design are carried out according to the overall scheme design.(3)The software and hardware design of the missile-borne micro-mini integrated navigation system.On the one hand,the overall hardware structure design of the system is given.According to the hardware structure design,the detailed circuit,communication interface and PCB design of each functional component are carried out;on the other hand,the functional component unit of the missile-borne micro-mini integrated navigation system The driver and communication interface of the software are designed.(4)MEMS-SINS assisted GNSS method design and research.In view of the disadvantages brought by the highly dynamic flight environment of guided projectiles to the integrated navigation system,the MEMS-SINS-assisted GNSS receiver baseband loop technology research and integrated navigation technology analysis and design under the highly dynamic flight environment were carried out.The simulator test verifies the rationality and feasibility of the algorithm design.(5)The function test and analysis of the missile-borne micro-mini integrated navigation system.According to the work of the missile-borne micro-mini integrated navigation system Environmental characteristics and hardware platform design have carried out a complete functional test.It mainly includes functional component test and complete machine test,and compares and analyzes the system and the benchmark of the high-precision fiber-optic inertial integrated navigation system.