Study On Telemetry Transmission And Ground Data Fusion Technique Of High Dynamic Aircraft

Telemetering system is an important constituent part of aircraft.As a key element of flight test and criteria for its success,the telemetry data which is complete and reliable can be a huge support for aircraft design remodeling,test failure analyzing and command decision making.Based on telemetering and data processing of the near space high dynamic aircraft test in launch field,the antenna design for signal transmission and the combining usage of telemetry data under the condition of multiple interference are discussed in this paper.Firstly,interference effects of the structure of the electrically large aircraft on the direction of the antenna pattern in different cases of installing 1~4 telemetry antenna are studied.Simulation calculation results show that the more antenna is,the more the direction of the antenna pattern is affected by the structure of the electrically large aircraft.And ?,? quadrant symmetrically arranged along the electrically large aircraft is the better case.Secondly,according to the results based on theoretical trajectory data from two ground control stations,influence of trajectory and attitude angle of aircraft on signal transmission is significant after 140s;If there is a deviation in the attitude angle,influence of trajectory and attitude angle of aircraft on signal transmission is significant between 60~120s,the influence degree increases with the increasing of the attitude angle.Thirdly,the usability of telemetry ground receiving data from multiple sources and multiple interference factors is discussed.And the completeness of multivariate telemetry data is analyzed by using a calibration standard consist of the frame structure,frame count,time code and negative code period.Then,the method of mosaicing data frame is adopted for reconstructing the ill conditioned data,results show that the telemetry ground receiving data from multiple sources and multiple interference factors is effectively used.In summary,in this paper,layout design of telemetry microstrip antenna of the near space high dynamic aircraft and the usability of telemetry ground receiving data is studied,calculation method considering the structure of the aircraft and the performance of the layout design of telemetry microstrip antenna is proposed,telemetry ground receiving data from multiple sources and multiple interference factors is well reconstructed.These work have a certain theoretical and engineering significance,which can effectively support telemetry and related work for the near space high dynamic aircraft.