Tethered Balloon Ground-based Monitoring System Design And Data Processing

As an air-platform, the aerostat has a good prospect of application in military and civil field. Mobile launch, easier handle and ease of use make it fit for carrying and supporting electronic equipments of communication, reconnaissance and interference. This air-platform can also be used to expand wide-band data. It is a supplement of satellite communication.The Ground Telemetry & Telecommand system has the key position in the flight test. It is an important means to make the aerostat safety, raise test efficiency, shorten test cycle and fulfil comprehensive test flight. During the process of flight, telemetry system aims and locks onto its target, receives data from tethered aerostat and implements the real time control for sphere by the ground.This thesis is to discuss the design and implementation of aerostat Ground Telemetry & Telecontrol system combined with the aerostat project. The ground test control software accomplishes the receiving, processing, save, display and alarm of the telemetry data. It provides not only the real-time and attitude information of the aerostat for the staff on the ground with the visual technology, but also many kinds of control commands to implement the control of the aerostat by staff on the ground. It can also use and display the old data after the real-time control. This software is designed in the Lab Windows/CVI development environment and based on the windows system platform.At first, the solution and structure of the Ground T&T system is briefly introduced, as well as the basic knowledge of 3D graphics including different kinds of coordinate and the transform among them. Second, the total framework and steps of realizing the system is mainly described. The specific implementation details contain multi-serial communication in Lab Windows/CVI and modeling, rendering and visualizing the aerostat with OpenGL. After that, algorithm is discussed on how to compensate the heading data of the magnetic compass. At last, further improvement suggestions are put forward, including a new system architecture and network topology, an Integrated Telemetry System based on wireless-network for test stage, an encoding scheme to enhance interference and security ability of remote control commands, an alarm-reporting system based on GSM short message and an attitude measurement sensor scheme etc..