Multi-objective Angle Measurement Based On Short Baseline Interference System

With the development of technology,work together has become an important trend in modern warfare sea and air defense attack.Facing the combat mission of the integration of space and ground,the coordinated navigation system,as a basic guarantee in the coordinated system,provides the main technical support for space information coordinated operations.In order to ensure the independence of the collaborative navigation system,it is necessary to introduce the relative angle measurement between nodes on the basis of range measurement.Due to the limited capacity of the mobile platform,the antenna size of the collaborative navigation device is not easy to be too large.It is necessary to design a short baseline high-precision angle measurement system and related technology based on mobile platform to ensure accurate relative navigation between nodes.In this paper,a high-precision angle measurement method based on the short baseline interference system in the collaborative combat cluster system is designed,and the solution fuzzy method is studied,and the corresponding capture and tracking algorithm is designed to achieve fast capture and stability tracking under high dynamic conditions.The main research contents of this paper are:(1)The fast capture algorithm in the background of the collaborative navigation system is studied.the fast captureprocess based on FFT algorithm is designed,and the capture circuit is designed.Using the Matlab simulation tool,the capture algorithm was simulated in an ideal environment with a low signal-to-noise ratio in most pryor environments.(2)The stable tracking algorithm under the background of multi-node coordinated navigation system is studied.The algorithm is designed for the tracking loop and a carrier tracking loop PN code loop,the tracking circuit design.Matlab simulation software is used in two situations: tracking algorithm simulation and verification Ideally the low SNR environment.(3)The measurement algorithm under the background of multi-node collaborative navigation system is studied.Design of high-precision angle measuring system based interferometer system,and using the search method of defuzzification.Matlab simulation software solution using fuzzy probability and angle measurement and simulation verification.(4)The FPGA simulation platform design of the algorithm involved is completed,and the synthesizable Verilog HDL is used in the Vivado simulation tool to design and simulate the various modules included in the algorithm,which further demonstrates the feasibility of the algorithm in this paper in engineering implementation.(5)The software required to complete two microwave darkroom tests using the Microsoft Visual Studio platform:the serial communication computer of RS422 and the navigation and positioning settlement software.The requirements analysis and software development solutions for problems arising in the course.The experiment was verified in the microwave anechoic chamber,and the test environment and process were explained.Through the method of laser calibration,errors are obtained according to the positioning results obtained by microwave ranging and laser ranging,which further verifies the performance of the algorithms involved.In summary,the capture,tracking and angular algorithm proposed in this paper can meet the requirements of the indicators proposed in the project.It can be quickly captured,stable tracked and high-precision angle measurement in high dynamic environment,and its feasibility can be verified by microwave darkroom experiments.