GPS simulator and realizing method thereof

Abstract

The invention discloses a realizing method of a GPS simulator. The method comprises the steps of (1), adding an m-function module which is Matlab into an aerial vehicle Simulink model by an upper computer, wherein an initial latitude and an initial longitude, a shooting angle and range, height and deviation of a current trajectory are input, and a real-time latitude and a real-time longitude are output, and defining the latitude and longitude as an NI VeriStand output; (2), converting latitude and longitude information to a standard 0183 protocol by the upper computer, and performing packaging for obtaining an LabView customized assembly; and (3), adding the customized assembly into a real-time simulation system platform NI VeriStand in a lower computer for operation by the upper computer. The realizing method of the GPS simulator has advantages of satisfying a requirement for simulated testing, greatly reducing calculation amount and ensuring high real-time performance of the system. A signal simulator based on a software mode has advantages of high flexibility in application and high extendibility.

Description

technical field [0001] The invention belongs to the field of flight control simulation, and in particular relates to a GPS simulator and a realization method thereof, which are used for GPS simulation in the flight simulation test process. Background technique [0002] GPS (Global Positioning System) is a radio navigation and timing system through satellites. It is a global satellite navigation system developed and developed by the US Department of Defense to replace the meridian system. With the development of GPS, the bomb-on system has begun to widely add it to the system control. The signal simulation technology and signal simulator of GPS have attracted more and more people's attention. The GPS signal simulator is to generate the signal on a specific reference point under certain environmental conditions by simulating, and provide a simulation signal source and corresponding analysis tools for the research of the experimental system, the test of the user end equipment ...

AI Technical Summary

Problems solved by technology

The advantages and disadvantages of these products are very clear. The advantages are good signal fidelity, and the disadvantages are large amount of calculation and poor real-time performance.

In addition, most of the traditional radio frequency signal simulators are implemented based on hardware, and can only test the developed prototype system or product. The hardware signal generation method determines that its structure and function have poor scalability.

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