| In order to overcome some inherent defects of the existing satellite navigation systems and to adapt to the growing demand for navigation systems of military large and medium-sized UAVs,researchers around the world are seeking a suitable navigation method.Ground-based radio navigation and positioning technology has gradually developed under this circumstance,and the corresponding navigation and positioning system is also emerging one after another.The most representative and most mature one is the Locata system developed by Australian Locata Company.At present,the system has basically realized the engineering applications.This paper systematically analyzes the foundation working principle of ground-based radio positioning system,and takes the Locata system as an example to study the key technologies of ground-based radio positioning system.On the basis of these studies,combined with the research projects of the author's own work,a ground-based radio positioning system has been designed and developed to basically meet the requirements of the maturity of engineering application technology.It provides a direction reference for the development of high-precision navigation system for military large and medium-sized unmanned aerial vehicles.The main work and contents of this paper are summarized as follows:1.The development background and research status of ground-based radio navigation and positioning technology were summarized,and the basic working principle and key technologies of ground-based radio positioning system were systematically studied.2.This paper developed the project design,detailed design,hardware development,software development,software and hardware synthesis of ground-based radio positioning system.Specifically,the design included the system configuration,main technical indicators of the system,the power supply and the interface relations of the system.Besides,the design of workflow and software of ground-based radio positioning system was completed,after that,comprehensive debugging of software and hardware was achieved.Finally,the performance of the positioning system was analyzed by ground simulation.3.A sports car test scheme was designedand carried out for the developed ground-based radio positioning system..And the conclusion was made by analyzing test data.4.According to the results of the sports car test,this paper checked for missing vacancies,made up for the problems and defects in the ground-based radio positioning system,and verified the sports car test again.Through iteration,optimization and improvement,the positioning system finally met the expectations and the final version of the ground-based radio positioning system was applied to the taxi test of small aircrafts. |
