| The various parameters recorded by the memory during the flight test are important basis for analyzing the performance of the aerocraft.Therefore,how to quickly and accurately recover the memory is critical.In this paper,a beacon based on Beidou's short message communication technology and landing prediction algorithm is designed,this device controls the calculator with the single-chip microcomputer as the core,predicts and estimates the coordinates of the fall point according to the real-time positioning information in the falling process,and uses Beidou's short message communication technology to send this information back to the ground to indicate the scope of the search.Firstly,according to the actual needs of the overall design analysis,while related to satellite positioning technology and wireless communication technology were introduced and compared.Secondly,the commonly used tracking prediction algorithm is introduced,and the polynomial fitting function algorithm is selected according to the application background,and the specific implementation of the algorithm is explained.Thirdly,the key hardware circuits were analyzed and designed,and the optimal design of the battery overcharge and Beidou communication frequency and capacity limitation problems that occurred during actual use were carried out.Next,the beacon and the overall workflow software within each module were carried out in detail.Finally,a reasonable and feasible test method is designed for the practical application environment,and the performance of the whole beacon and each module can be easily evaluated.Through the establishment of a closed loop test platform between the positioning beacon,test cable and Beidou handheld terminal,the function of the beacon is simulated and ejected,and the test showed that beacon can be achieved accurately predict the placement of the memory range,improve the recovery efficiency of the memory,with a clear indication,easy to use features. |
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