Space Very Long Baseline Interferometry(S-VLBI) is an aperture synthesis technique utilizing an array of radio telescopes including ground telescopes and space orbiting telescopes.It can achieve much higher spatial re...Space Very Long Baseline Interferometry(S-VLBI) is an aperture synthesis technique utilizing an array of radio telescopes including ground telescopes and space orbiting telescopes.It can achieve much higher spatial resolution than that from the ground-only VLBI.In this paper,a new concept of twin spacecraft S-VLBI has been proposed,which utilizes the space-space baselines formed by two satellites to obtain larger and uniform uv coverage without atmospheric influence and hence achieve high quality images with higher angular resolution.The orbit selections of the two satellites are investigated.The imaging performance and actual launch conditions are all taken into account in orbit designing of the twin spacecraft S-VLBI.Three schemes of orbit design using traditional elliptical orbits and circular orbits are presented.These design results can be used for different scientific goals.Furthermore,these designing ideas can provide useful references for the future Chinese millimeter-wave S-VLBI mission.展开更多
在“数字中国”的宏伟目标下,当前我国航天器的研制模式正在从文档驱动的研制模式向模型驱动的研制模式升级转换,基于模型的系统工程(model-based systems engineering,MBSE)是指导这次研制模型升级的核心方法.其中,MBSE的核心内容之一...在“数字中国”的宏伟目标下,当前我国航天器的研制模式正在从文档驱动的研制模式向模型驱动的研制模式升级转换,基于模型的系统工程(model-based systems engineering,MBSE)是指导这次研制模型升级的核心方法.其中,MBSE的核心内容之一是数字孪生体模型的构建与运行问题.航天器数字孪生体模型由多尺度模型构成,例如航天器系统级数字孪生体模型、子系统级数字孪生体模型以及部件级数字孪生体模型.同时航天器数字孪生体模型还由多维度模型构成,例如结构模型、软件模型和电路模型等.如何将多尺度的模型与多维度的模型按照一定的规范综合链接为一个整体的数字孪生体模型已成为MBSE领域关键研究的内容.本文提出一种具有普适性的航天器数字孪生体模型的构建方法,同时针对航天器数字孪生体模型的通用运行平台的设计架构与原理,提出一种基于操作系统原理的实践方案.展开更多
基金Supported by the Natural Science Foundation of China(40701100,40801136)the Strategic Priority Program on Space Science of the Chinese Academy of Sciences(XDA04060803)
文摘Space Very Long Baseline Interferometry(S-VLBI) is an aperture synthesis technique utilizing an array of radio telescopes including ground telescopes and space orbiting telescopes.It can achieve much higher spatial resolution than that from the ground-only VLBI.In this paper,a new concept of twin spacecraft S-VLBI has been proposed,which utilizes the space-space baselines formed by two satellites to obtain larger and uniform uv coverage without atmospheric influence and hence achieve high quality images with higher angular resolution.The orbit selections of the two satellites are investigated.The imaging performance and actual launch conditions are all taken into account in orbit designing of the twin spacecraft S-VLBI.Three schemes of orbit design using traditional elliptical orbits and circular orbits are presented.These design results can be used for different scientific goals.Furthermore,these designing ideas can provide useful references for the future Chinese millimeter-wave S-VLBI mission.
文摘在“数字中国”的宏伟目标下,当前我国航天器的研制模式正在从文档驱动的研制模式向模型驱动的研制模式升级转换,基于模型的系统工程(model-based systems engineering,MBSE)是指导这次研制模型升级的核心方法.其中,MBSE的核心内容之一是数字孪生体模型的构建与运行问题.航天器数字孪生体模型由多尺度模型构成,例如航天器系统级数字孪生体模型、子系统级数字孪生体模型以及部件级数字孪生体模型.同时航天器数字孪生体模型还由多维度模型构成,例如结构模型、软件模型和电路模型等.如何将多尺度的模型与多维度的模型按照一定的规范综合链接为一个整体的数字孪生体模型已成为MBSE领域关键研究的内容.本文提出一种具有普适性的航天器数字孪生体模型的构建方法,同时针对航天器数字孪生体模型的通用运行平台的设计架构与原理,提出一种基于操作系统原理的实践方案.
