X射線脈沖星導航仿真系統(tǒng)硬件設計
發(fā)布時間：2019-02-11 15:45
【摘要】：脈沖星是一類自轉周期非常穩(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、導航等領域展現出巨大的應用前景。因此基于X射線脈沖星的導航定位發(fā)展成為一種新的自主天文導航技術。 本文實現了一種X射線脈沖星導航仿真系統(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硬件電路分別實現脈沖星信號的模數轉換和數模轉換,最后采用基于FPGA的硬件電路方法實現系統(tǒng)的控制以及算法的實現,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的系統(tǒng)。仿真及實驗測試結果表明,該仿真系統(tǒng)可以滿足X射線脈沖星導航定位算法的實現,達到了設計要求。
[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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2010
【分類號】：P145.6
本文編號：2419873
[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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2010
【分類號】：P145.6
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