使用广义总体最小二乘(GTLS,generalized total least squares)方法对零动量卫星进行惯量矩阵在轨辨识.提出了GTLS算法的先验最小距离解的定义:当测量信息不足以确定唯一解时,解空间中最接近先验估计的解.给出了先验最小距离解的算法,...使用广义总体最小二乘(GTLS,generalized total least squares)方法对零动量卫星进行惯量矩阵在轨辨识.提出了GTLS算法的先验最小距离解的定义:当测量信息不足以确定唯一解时,解空间中最接近先验估计的解.给出了先验最小距离解的算法,并应用于惯量矩阵在轨辨识.仿真结果表明了该辨识方法的有效性及先验最小距离解相对于最小范数解的优越性.展开更多
The on-shell renormalization scheme for electroweak theory is well studied in the standard model （SM）, but a consistent on-shell renormalization scheme for the minimal supersymmetric standard model （MSSM） is still...The on-shell renormalization scheme for electroweak theory is well studied in the standard model （SM）, but a consistent on-shell renormalization scheme for the minimal supersymmetric standard model （MSSM） is still unknown. In the MSSM, we study the on-shell scheme for three vertexes： with virtual SUSY particles （chargino, sneutrino, neutralino and slepton） at one-loop order. Instead of the amplitude of a single triangle diagram, the sum of the amplitude of triangle diagrams belonging to one suit can be renormalized in the on-shell scheme. One suit points out that the internal virtual particles are consistent. The zero-momentum scheme is also used for the renormalization. The two schemes can make the renormalized results decoupled, and in the MSSM some of the special characters of the on-shell scheme are shown. This work is propitious in completing the on-shell renormalization scheme in the MSSM.展开更多
先进天基太阳天文台(Advanced Space-based Solar Observatory,ASO-S)卫星姿控分系统的主要任务是实现高精度、高稳定度对日指向控制.ASO-S卫星的科学载荷中,白光望远镜(White-light Solar Telescope,WST)前端配置了太阳导行镜(Guide Te...先进天基太阳天文台(Advanced Space-based Solar Observatory,ASO-S)卫星姿控分系统的主要任务是实现高精度、高稳定度对日指向控制.ASO-S卫星的科学载荷中,白光望远镜(White-light Solar Telescope,WST)前端配置了太阳导行镜(Guide Telescope,GT)稳像系统,利用正交分布光电二极管组成的边缘探测器测量导行镜光轴与太阳中心的偏差角.提出了一种将GT测量值引入姿态控制闭环的控制方法:利用星敏陀螺定姿算法获得卫星-太阳方向姿态偏差,GT测量值确定非卫星-太阳方向姿态偏差;以4斜装反作用轮组为执行机构,进行三轴零动量稳定姿态控制.通过数学仿真验证,基于GT测量值的姿态控制器在非卫星-太阳方向的绝对指向精度优于2′′、相对姿态稳定度优于1′′/60 s,满足ASO-S卫星高精度高稳定度的对日指向要求.展开更多
文摘使用广义总体最小二乘(GTLS,generalized total least squares)方法对零动量卫星进行惯量矩阵在轨辨识.提出了GTLS算法的先验最小距离解的定义:当测量信息不足以确定唯一解时,解空间中最接近先验估计的解.给出了先验最小距离解的算法,并应用于惯量矩阵在轨辨识.仿真结果表明了该辨识方法的有效性及先验最小距离解相对于最小范数解的优越性.
基金Supported by National Natural Science Foundation (11047002, 10975027)Natural Science Foundation of Hebei Province in China (A2011201118)
文摘The on-shell renormalization scheme for electroweak theory is well studied in the standard model （SM）, but a consistent on-shell renormalization scheme for the minimal supersymmetric standard model （MSSM） is still unknown. In the MSSM, we study the on-shell scheme for three vertexes： with virtual SUSY particles （chargino, sneutrino, neutralino and slepton） at one-loop order. Instead of the amplitude of a single triangle diagram, the sum of the amplitude of triangle diagrams belonging to one suit can be renormalized in the on-shell scheme. One suit points out that the internal virtual particles are consistent. The zero-momentum scheme is also used for the renormalization. The two schemes can make the renormalized results decoupled, and in the MSSM some of the special characters of the on-shell scheme are shown. This work is propitious in completing the on-shell renormalization scheme in the MSSM.
文摘先进天基太阳天文台(Advanced Space-based Solar Observatory,ASO-S)卫星姿控分系统的主要任务是实现高精度、高稳定度对日指向控制.ASO-S卫星的科学载荷中,白光望远镜(White-light Solar Telescope,WST)前端配置了太阳导行镜(Guide Telescope,GT)稳像系统,利用正交分布光电二极管组成的边缘探测器测量导行镜光轴与太阳中心的偏差角.提出了一种将GT测量值引入姿态控制闭环的控制方法:利用星敏陀螺定姿算法获得卫星-太阳方向姿态偏差,GT测量值确定非卫星-太阳方向姿态偏差;以4斜装反作用轮组为执行机构,进行三轴零动量稳定姿态控制.通过数学仿真验证,基于GT测量值的姿态控制器在非卫星-太阳方向的绝对指向精度优于2′′、相对姿态稳定度优于1′′/60 s,满足ASO-S卫星高精度高稳定度的对日指向要求.
