Design Of Large Capacity Data Storage System For UAV-borne Radar

In order to obtain deeper information in the UAV on-board radar data,it is not only required to store the radar spots,but also to store a large amount of radar raw data,which puts forward higher requirements for the capacity of the UAV-borne storage system.At the same time,with the increase of data volume,the data return processing process after the experiment will consume more time,which will seriously affect the progress of the experiment.Therefore,how to shorten the data backhaul processing time while ensuring the reliable storage of large-capacity data is the focus of this paper.Aiming at the requirement of reliable storage of large capacity data and simplified data transfer,a storage architecture based on microhost and mobile solid-state disk is designed.By taking advantage of the micro host to provide storage device interface driver and file management system,the software is used to control storage,and the file storage of large capacity data is realized.After the experiment,the experimental data can be obtained only by removing the storage device.Secondly,in view of the need for geographical location positioning in the analysis of radar data playback,FPGA is used to make a mixed frame of radar data and GPS positioning data to ensure real-time correspondence between the two kinds of data.Moreover,by analyzing the error sources of GPS positioning accuracy and improving the positioning accuracy,satellite-based enhancement system technology and multi-feed point design of receiving antenna are selected.The GPS positioning module with positioning accuracy less than 1m is realized.At the same time,gigabit Ethernet communication technology is used to realize high-speed and reliable data transmission between FPGA and microhost.Finally,the whole mass storage system test platform is built to test each function module and the overall performance of the system.The test results show that the system can realize the reliable storage without error and frame loss at the data transmission rate of 240 Mbps,and has a 4TB storage space to store experimental data for many times at the same time.The experimental data can be obtained without data transmission,which has reached the design technical index,and has certain reference significance for the research of large-capacity data storage system.