Research And Implementation Of The Hypersonic Vehicle Telemetry Transmission System

The hypersonic vehicle telemetry transmitting system collects,modulates,amplifies and transmits the aircraft state information,so that the ground telemetry receiving station can acquire the data of the aircraft in real time.Compared with the general telemetry transmission system,many types of signals,large amount of data and high transmission rate place heavy demands on the data acquisition and processing module in hypersonic vehicle telemetry transmitting system.Due to high altitude,high speed flight,in order to ensure a stable and long-distance communications transmit signal frequency,the system has a high requirement for antenna design and power consumption.It also needs to take additional means to ensure the reliable access to data.To solve those problems,this thesis carried out the work of the following areas: 1.The design and implement of sensor and editor.This thesis analysis the signal acquisition and conditioning of vibration,temperature,angular rate and acceleration sensors,gives the hardware design.2.The design and implement of digital transmitter module.This thesis designs a zero-IF quadrature modulation transmitter system according to the system design indicators,and gives a specific schematic diagram,baseband signal processing design,key equipment selection and simulation of modulation.3.The design and implement of Wideband omnidirectional conformal telemetry antenna.This thesis designs a microstrip antenna array with low dielectric and high temperature resistant.By comparing the simulation results,the number of antenna elements and the layout method are carefully selected to obtain the best pattern coverage.The potential interference between multiple antennas is also analyzed,and the isolation between different types of antennas is improved by optimizing the layout.4.The tests and analyses.This thesis tests the subsystems,analyzes the results,and verifies the feasibility of the design.The thesis gives a complete design of a hypersonic vehicle telemetry transmitting system,including the sensors,editor,transmitter and antenna.Performance analyses validate the meeting of requirements.