Research And Implementation Of ADS-B Track Filter Algorithm And Display System

The current air traffic congestion situation is becoming more and more serious,and the aviation surveillance system is an important foundation for the safe flight of aircraft.Therefore,the ADS-B surveillance system came into being and is widely used.The airborne navigation equipment in the ADS-B system obtains the track message data and transmits it in a certain message format.However,in the process of sending,transmitting and receiving the track message,it will be interfered by the surrounding environment,and some data will be lost or wrong,making the ADS-B track inevitable error.In view of the above problems,this paper studies the key algorithms of ADS-B track data processing and filtering.The ADS-B surveillance technology is described in this paper,including the ADS-B technology principle,ADS-B system composition,ADS-B data link and message format,and ADS-B track processing flow.This paper analyzes the transmission specification of1090 MHz extended intermittent oscillation ADS-B data in "Annex10 to the Convention on international Civil Aviation",studies the ADS-B data structure,analyzes the ME field decoding and CPR decoding,and generates the target position,height,speed,flight number,ICAO address code and other information,and finally form a single ADS-B track.Then,the track motion model and track filtering algorithm are analyzed and studied in this paper.The ADS-B messages are filtered to form more accurate track information,including the establishment of motion models and the derivation of filter algorithm principles and steps.The improved algorithm is based on square root volume Kalman's variable structure interactive multi-model algorithm.The improved algorithm can effectively filter ADS-B messages,identify and suppress erroneous data,perform effective track prediction and tracking,and finally achieve high-precision monitoring of aircraft.Finally,in the design and implementation of the track acquisition and display system,the functional requirements of the system are analyzed,and the overall structure of the display system is designed.The Windows XP development platform,Visual C++development tools,MapX control,and Access 2013 database are adopted in this system.This system realizes the function of displaying the flight path of the aircraft in real time according to the filtered ADS-B message data provided by the background database.