Simulation and Implementation of Aircraft DME Ranging System Based on Acoustic Wave
The aircraft distance measuring equipment(DME),serving as a crucial component of ground-based radio navigation systems,consists of an airborne ground station and onboard devices,among which the reply receiver is the core device for the ground station,while the interrogator as the core device for the aircraft's onboard system.However,the current majority of DME research primarily focuses on simulating the transponder,neglecting the simulation of the entire interrogation-reply-distance measuring phase.To address this,this paper proposes and designs a DME distance simulation system based on sound waves.Considering the challenges caused by the large volume and complex circuit of the separate devices in current transponders,field-programmable gate array(FP-GA)is taken as the core processor to implement the primary functions of the simulated transponder.As the design aims to simulate and demonstrate the integrity of the process without the high frequency pulses,the system adopts the audio-ranging method,and the filters are used to digitally process the acoustic signals.Experimental results show that the entire ranging system completely works in the interrogation-response-ranging process,realizing the ranging function of the simulated DME,with a ranging accuracy of 10 4 mm.
万方数据
维普
