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	Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割 Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158 作者: HXMT \| 收藏 \| 浏览/下载：53/0 \| 提交时间：2022/02/08 Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.
	Modular aircraft simulation platform based on simulink (EI CONFERENCE) 会议论文 OAI收割 2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China Chen C.-Q.; Ji Y. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 Aircraft simulation platform is the most important supporting technology in the aircraft development process. This simulation platform can be used for validating the design of subsystem and also it provides the necessary data for the Aircraft design. Wind has great impact on the flight parameter. In order to accurately simulate the wind model and calculate the flight parameters a simulation modeling method for flight parameter simulation platform under wind field environment is established. Firstly the various sub-systems which affecting flight parameters are analyzed some mathematical models of the flight parameter simulation platform is established. Secondly the atmospheric wind field is studied to analyze the impact on its trajectory. Then the model is built in the Simulink toolbox in the Matlab which is based on the principles of hierarchy and modularity using C MEX S-function for the complex kinetic equations. Finally when the models have been established encapsulating models for several subsystem and assembling them for the Aircraft simulation platform based on the unified interface. The simulation tests (including the performance test of a certain gliding Aircraft the wind influence test of a certain uncontrolled aircraft) prove the simulation capability of the platform and its calculating step can reach 1 ms. Comparing simulation with field test data of a certain uncontrolled aircraft it shows that the relative deviation of range is 0.47% the relative deviation of maximal altitude is 2.1%. Taking relevant standards as a reference standard it is demonstrated the platform is reliable meets the engineering accuracy requirements. 2010 IEEE.
	TIME-IGGCAS model validation: Comparisons with empirical models and observations 期刊论文 OAI收割 SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2008, 卷号: 51, 期号: 3, 页码: 308-322 作者: Yue XinAn; Wan WeiXing; Liu LiBo; Ning BaiQi; Zhao BiQiang \| 收藏 \| 浏览/下载：18/0 \| 提交时间：2018/09/26 ionosphere theoretical model empirical model satellite observation relative deviation
	TIME-IGGCAS model validation: Comparisons with empirical models and observations 期刊论文 OAI收割 SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2008, 卷号: 51, 期号: 3, 页码: 308-322 作者: Yue XinAn; Wan WeiXing; Liu LiBo; Ning BaiQi; Zhao BiQiang 收藏 \| 浏览/下载：46/0 \| 提交时间：2015/10/13 ionosphere theoretical model empirical model satellite observation relative deviation
	TIME-IGGCAS model validation: Comparisons with empirical models and observations 期刊论文 OAI收割 SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2008, 卷号: 51, 期号: 3, 页码: 308-322 作者: Yue XinAn; Wan WeiXing; Liu LiBo; Ning BaiQi; Zhao BiQiang \| 收藏 \| 浏览/下载：20/0 \| 提交时间：2018/09/26 ionosphere theoretical model empirical model satellite observation relative deviation