【摘要】：脈沖星是一類自轉(zhuǎn)周期非常穩(wěn)定的中子星,其最顯著的特性是所輻射信號的周期均勻性,這一特性使其在計時、導(dǎo)航等領(lǐng)域展現(xiàn)出巨大的應(yīng)用前景。因此基于X射線脈沖星的導(dǎo)航定位發(fā)展成為一種新的自主天文導(dǎo)航技術(shù)。 本文實現(xiàn)了一種X射線脈沖星導(dǎo)航仿真系統(tǒng),該系統(tǒng)由脈沖星信號模擬器和脈沖星信號接收機兩部分組成,系統(tǒng)采用通用串行接口(Universal Serial Bus)作為通信接口,極大的提高了系統(tǒng)整體的傳輸速率和靈活性。同時,采用AD硬件電路和DA硬件電路分別實現(xiàn)脈沖星信號的模數(shù)轉(zhuǎn)換和數(shù)模轉(zhuǎn)換,最后采用基于FPGA的硬件電路方法實現(xiàn)系統(tǒng)的控制以及算法的實現(xiàn),使系統(tǒng)在實時性,靈活性和性價比等方面優(yōu)于采用其他處理器所實現(xiàn)的系統(tǒng)。仿真及實驗測試結(jié)果表明,該仿真系統(tǒng)可以滿足X射線脈沖星導(dǎo)航定位算法的實現(xiàn),達(dá)到了設(shè)計要求。
[Abstract]:Pulsars are a kind of neutron stars whose rotation period is very stable. The most remarkable characteristic of pulsars is the periodicity of the radiated signals, which makes pulsars have great application prospects in the fields of timing, navigation and so on. Therefore, X-ray pulsar based navigation and positioning has become a new autonomous astronomical navigation technology. In this paper, an X-ray pulsar navigation simulation system is implemented. The system is composed of pulsar signal simulator and pulsar signal receiver. The system adopts universal serial interface (Universal Serial Bus) as the communication interface. Greatly improve the overall transmission rate and flexibility of the system. At the same time, the AD hardware circuit and the DA hardware circuit are used to realize the signal conversion of the pulsar signal respectively. Finally, the hardware circuit method based on FPGA is used to realize the control of the system and the realization of the algorithm, which makes the system real-time. Flexibility and cost-to-performance ratio are superior to systems implemented using other processors. The simulation and experimental results show that the simulation system can meet the requirements of X-ray pulsar navigation and positioning algorithm.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：P145.6

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本文編號：2419873