Hardware-in-the-Loop Simulation System of Flight Checking of Microwave Landing System Based on Scale Model

The simulation of flight checking has an important value for the real flight checking.In this hardware-in-the-loop simulation system,according to the technology system and navigation principle of the microwave landing system (MLS),and according to the characteristics of the laser beam,the controllable laser transmitting equipment was used to simulate the function of the angle navigation antenna of the MLS,radiating well directional laser scanning signal.According to the electromagnetic similitude theory,the scale model of the environment of an airport equipped was set up with the MLS,and.the propagation of the laser in the scale model of the airport was used to simulate the real propagation situation of the navigation signal transmitted by the MLS.The feasibility of this simulation system.was analyzed thoroughly,including the wavelength of laser used and the scanning speed.This simulation system utilizes the MATLAB/RTW rapid prototyping target—xPC target to run the real-time simulation of the airborne receiver signal processing.The debugging and setup of the simulation parameters are convenient.