高速數(shù)據(jù)存儲器研制
[Abstract]:Flight test is a very important part in the design and manufacture of aircraft. In flight test, the signals of various state parameters need to be recorded in real time, and the performance and technical indexes of the aircraft are evaluated and improved by analyzing the data. And the test environment is complex and bad during flight, which requires the design of high speed data recorder to record data. By analyzing the demand of high speed data recorder and investigating the present situation at home and abroad, the design scheme of high speed data recorder is given in this paper, and the key hardware module, software structure and key points are further explained. In this paper, a pair of serial chips of TI Company are used to realize the transceiver of LVDS (Low Voltage Differential Signal) signal, the cable equalizer is added in the middle of the link, and the design method is adopted to isolate the signal ground and reference ground. Two independent SMA (SMall A-type) interfaces are used to realize impedance matching, which increases the transmission distance of LVDS to more than 10 m. The data serial transmission rate is up to 300 Mbps. In the design, two sets of hardware storage circuits are controlled by two pieces of FPGA, the information recording and indexing modules are added, the front-end cache circuit is designed, and the high-speed data reading is realized. And how to realize the data communication cooperation between FPGA is explained. In this paper, Micron's 32GB SLC (Single Level Cell) NANDFlash is used as storage medium, and 8 parallel arrays are used to realize 256GB storage. Two pieces are divided into four groups, and the real time storage rate is 50 MB / s. To meet the maximum data transmission rate and data capacity requirements. The design of the high-speed data recorder accords with the technical specifications, and has passed the environmental test verification. In the dark room test, the horizontal hanging flight, the high speed dive and the flight test, each performance index is normal, the data record is reliable, meets the use flow request.
【學位授予單位】:哈爾濱工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2018
【分類號】:V217;TP333
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