Development Of Flight Electronic Tablet Software Based On Android

At present,the construction of China's flight service system is still not perfect enough,and there is still a certain gap with developed countries.At the same time,the networking of China's Beidou satellite navigation system has been basically completed.Applying this technology to the general aviation field is not only conducive to ensuring the safety and reliability of aviation supervision,but also improving the utilization ratio of Beidou satellite navigation system in the aviation field.Based on Beidou satellite navigation technology and the actual needs of pilots,a multi-functional flight electronic tablet software is developed,which provides pilots with a variety of practical functions,and also provides a way for communication between ground command center personnel and pilots.The main work of this paper is as follows:(1)The whole Beidou aviation supervision system is composed of Beidou commander,Beidou positioning terminal,server and flight electronic tablet client.The server is used for resource storage and management,and the Beidou positioning terminal is used to collect aircraft flight data.The short message communication is realized through the Beidou satellite navigation system and the Beidou commander.The flight electronic tablet is a multi-functional tablet that can provide great convenience to the pilot.It can be used together with the Beidou positioning terminal to complete positioning,short message communication and inquiring the working status of the equipment.This project designed the overall architecture of the whole system,developed the flight electronic tablet client software based on Android and Beidou navigation technology,realized aircraft positioning tracking,equipment working status query,multi-aircraft location sharing,short message communication,historical track query,route settings,video decompression and playback,blind drop guidance and other functions.(2)Using Android Studio development platform,the program development of each function of the flight electronic tablet software is completed.The data between the flight electronic tablet and the Beidou positioning terminal is transmitted according to the agreed protocol through Bluetooth,and the tablet software parses the data according to the protocol format,and the two are used together to realize all the functions required.Baidu offline map is used in the software to solve the problem of using map without network signal in flight process;Bessel curve fitting method is used to smooth the trajectory in the course of track playback to make it more in line with the actual flight trajectory;the design of data tables in the database is completed,and the encrypted operation of the database is carried out using SQLCipher to ensure the Security of SQLite database.(3)Aiming at blind landing guidance in bad weather,the requirement of track prediction is put forward.The interactive multiple model(IMM)algorithm,which is the most widely used and has good prediction effect in trajectory prediction nowadays,is studied.An example is simulated by using MATLAB,which proves the effectiveness of track prediction using this algorithm in aircraft landing process.Then the function is realized in software.It has good tracking and prediction effect.Finally,the software is debugged and tested with the rest of the system.The results show that the developed software has fulfilled the design requirements of the required functions.The development of flight electronic tablet software provides pilots with convenience.It is an exploration and practice of Beidou Satellite Navigation System in the field of general aviation.It is conducive to promoting and improving the construction of flight service system in China.