具有多物理特性的X射线脉冲星信号模拟

发布时间：2018-07-05 01:04

本文选题：X射线脉冲星 + 信号模拟　；参考：《西安电子科技大学学报》2016年05期

【摘要】：针对目前X射线脉冲星实测数据量少、不连续的问题,笔者以罗西卫星X射线脉冲星实测数据物理特性为先验信息,采用快速迭代法在10μs时间转换模型下,模拟产生了航天器处具有周期特性、能谱特性、背景噪声特性及具有各种延迟效应的X射线脉冲星信号.设计和实现了具有多物理特性的X射线脉冲星信号仿真软件.比较相同条件下的实测和模拟数据可得:模拟的噪声和实际噪声具有相同的分布;模拟与实测的脉冲星数据周期变化趋势吻合,误差仅为0.43%;不同能级模拟和实测数据累积轮廓的皮尔逊相关系数均达到0.99以上;10μs时间转换模型下,模拟的数据时间转换误差仅为10~(-7) s,模拟的数据和实测数据误差也仅为10-7 s,满足时间转换精度要求.所以,文中方法可实现具有多物理特性的X射线脉冲星信号的高保真模拟及连续获取.
[Abstract]:In order to solve the problem that the measured data of X-ray pulsars are small and discontinuous, the author takes the physical characteristics of X-ray pulsars measured by Rosie satellite as a priori information and adopts the fast iterative method under the 10 渭 s time conversion model. The simulation results show that the spacecrafts have periodic characteristics, energy spectrum characteristics, background noise characteristics and X-ray pulsar signals with various delay effects. An X-ray pulsar signal simulation software with multi-physical characteristics is designed and implemented. Comparing the measured and simulated data under the same conditions, it can be obtained that the simulated noise and the actual noise have the same distribution, and the periodic variation trend of the simulated and measured pulsar data is consistent. The error is only 0.43 and the Pearson correlation coefficients of the accumulated profiles of different energy levels and measured data are above 0.99 渭 s and 10 渭 s, respectively. The time conversion error of the simulated data is only 10 ~ (-7) s, and the error of the simulated data and the measured data is only 10 ~ (-7) s, which satisfies the requirement of the time conversion accuracy. Therefore, the high fidelity simulation and continuous acquisition of X-ray pulsars with multiple physical properties can be realized by using this method.
【作者单位】：西安电子科技大学空间科学与技术学院;
【基金】：国家基础研究计划(973计划)资助项目(2014CB340205) 国家自然科学基金资助项目(61301173,61473228)
【分类号】：P172.2;P145.6

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