發(fā)布時間：2018-07-06 15:08

  本文選題：嵌入式 + 中頻�。� 參考：《北華航天工業(yè)學(xué)院》2015年碩士論文

【摘要】：地面測控設(shè)備向航天器發(fā)送上行遙控信號和測量信號,接收航天器下傳的遙測信號和測量信號,實現(xiàn)星地間距離和衛(wèi)星運(yùn)行速度的測量,并實時地監(jiān)測及控制衛(wèi)星的工作狀態(tài)。目前,大部分的中頻測控設(shè)備雖然性能優(yōu)良、功能完備,但是設(shè)備的價格高、體積和重量都較大;本文設(shè)計實現(xiàn)的嵌入式中頻測控設(shè)備具有體積小,重量輕,攜帶方便,成本低,使用方便,通過網(wǎng)絡(luò)操作等優(yōu)勢,可用于航天器上的單機(jī)測試、分系統(tǒng)測試和整星AIT,還適用于測控模擬器測試和航天器在軌支持。論文借鑒軟件無線電思想,實現(xiàn)了以ARM處理器和FPGA為核心的通用硬件平臺設(shè)計,通過加載軟件實現(xiàn)中頻測控設(shè)備的調(diào)制解調(diào)功能。使用仿真工具對部分電路進(jìn)行了仿真分析。設(shè)備可對70MHz中頻信號進(jìn)行帶通采樣,采用FPGA完成中頻數(shù)字處理的所有流程。采用FPGA實現(xiàn)信號的調(diào)制,利用ADC模塊實現(xiàn)70MHz的上變頻,可實現(xiàn)各種調(diào)制方式,使得設(shè)備具有很好的靈活性。經(jīng)過電性能測試,中頻測控設(shè)備在USB/UCB體制下,輸出信號最大輸出功率0d Bm,最小輸出功率-90d Bm,接收靈敏度優(yōu)于-90d Bm,動態(tài)范圍優(yōu)于90d B,視頻通道收發(fā)信號功能正常,副載波頻率及其他多項參數(shù)可配置,設(shè)備具有良好的通用性。
[Abstract]:The ground measurement and control equipment sends the uplink remote control signal and the measurement signal to the spacecraft, receives the remote sensing signal and the measurement signal from the spacecraft, realizes the measurement of the distance between the satellites and the speed of the satellite, and monitors and controls the working state of the satellite in real time. At present, most of the intermediate frequency measurement and control equipment has good performance and complete function, but the price of the equipment is high, the volume and weight of the device are large. The embedded if measurement and control equipment designed and implemented in this paper has the advantages of small volume, light weight, convenient carrying. It has the advantages of low cost, easy to use and network operation. It can be used in single machine test, subsystem test and whole satellite AIT. it is also suitable for the test of measurement and control simulator and the support of spacecraft in orbit. Based on the idea of software radio, the design of general hardware platform based on arm processor and FPGA is realized, and the modulating and demodulating function of if measurement and control equipment is realized by loading software. Some circuits are simulated and analyzed with simulation tools. The device can carry on the bandpass sampling to the 70 MHz if signal, and use FPGA to complete all the flow of if digital processing. FPGA is used to realize signal modulation and ADC module is used to realize 70 MHz up-conversion. All kinds of modulation modes can be realized, which makes the device very flexible. Through the electrical performance test, if measurement and control equipment under USB / UCB system, the maximum output power of output signal is 0dBm, the minimum output power is -90dBm, the receiving sensitivity is better than -90dBm, the dynamic range is better than 90dB. the function of video channel transceiver signal is normal. Subcarrier frequency and other parameters can be configured, the equipment has good versatility.
【學(xué)位授予單位】：北華航天工業(yè)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：V556

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相關(guān)期刊論文 前4條

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本文編號：2103194