System and method for maneuver plan for satellites flying in proximity using apocentral coordinate system
    1.
    发明授权
    System and method for maneuver plan for satellites flying in proximity using apocentral coordinate system 有权
    使用中心坐标系在附近飞行的卫星的机动计划的系统和方法

    公开(公告)号:US08768622B2

    公开(公告)日:2014-07-01

    申请号:US14028495

    申请日:2013-09-16

    申请人: Liam M. Healy

    发明人: Liam M. Healy

    IPC分类号: B64G1/10 B64G1/24

    摘要: A technique to assist guidance techniques for a free-flying inspection vehicle for inspecting a host satellite. The method solves analytically in closed form for relative motion about a circular primary for solutions that are non-drifting, i.e., the orbital periods of the two vehicles are equal, computes the impulsive maneuvers in the primary radial and cross-track directions, and parameterizes these maneuvers and obtain solutions that satisfy constraints, for example collision avoidance or direction of coverage, or optimize quantities, such as time or fuel usage. Apocentral coordinates and a set of four relative orbital parameters are used. The method separates the change in relative velocity (maneuvers) into radial and crosstrack components and uses a waypoint technique to plan the maneuvers.

    摘要翻译: 协助用于检查主机卫星的自由飞行检查车辆的指导技术的技术。 该方法以封闭形式解析解,对于非漂移的解决方案,即圆形初级物体的相对运动,即两个车辆的轨道周期相等,计算主径向和横向方向上的冲击演习,并参数化 这些操纵并获得满足约束的解决方案,例如碰撞避免或覆盖方向,或优化数量,如时间或燃料使用。 使用中心坐标和一组四个相对轨道参数。 该方法将相对速度(机动)的变化分为径向和交叉分量,并使用航点技术来计划演习。

    System and method for interferometrically tracking objects using a low-antenna-count antenna array
    2.
    发明申请
    System and method for interferometrically tracking objects using a low-antenna-count antenna array 审中-公开
    使用低天线数天线阵列对物体进行干涉测量的系统和方法

    公开(公告)号:US20150220488A1

    公开(公告)日:2015-08-06

    申请号:US14615238

    申请日:2015-02-05

    申请人: Liam M. Healy

    发明人: Liam M. Healy

    IPC分类号: G06F17/18 G01S13/84

    摘要: A radio-frequency interferometry method for determining parameters of motion of a moving object from phase difference information from an antenna baseline formed of two antennas. At each of a plurality of observation events, compute a posterior probability density function from the phase differences from the baseline, separate the modes with a threshold value of probability density, and compute a probability of each mode. For each possible sequence of modes, determine a mode sequence probability as the product of the probabilities of each mode in that sequence, estimate a χ2 goodness of fit function based on an assumed type of motion. Determine the net probability of each possible sequence of modes as the product of a relative probability derived from the χ2 and the mode sequence probability. Alternately, two or more parallel or colinear baselines are used, and the posterior PDF is a combined PDF over each of the baselines.

    摘要翻译: 一种用于从由两个天线形成的天线基线的相位差信息确定移动物体的运动参数的射频干涉测量方法。 在多个观察事件中的每个观察事件中,根据与基线的相位差计算后验概率密度函数,以模式与概率密度的阈值进行分离,并计算各模式的概率。 对于每个可能的模式序列,确定模式序列概率作为该序列中每个模式的概率的乘积,基于假定的运动类型来估计拟合函数的χ2优良度。 确定每个可能的模式序列的净概率作为从χ2导出的相对概率与模式序列概率的乘积。 或者,使用两个或更多个平行或共线基线,并且后面的PDF是每个基线上的组合PDF。

    System and Method for Maneuver Plan for Satellites Flying in Proximity
    3.
    发明申请
    System and Method for Maneuver Plan for Satellites Flying in Proximity 有权
    近距离飞行卫星操纵规划系统与方法

    公开(公告)号:US20140077036A1

    公开(公告)日:2014-03-20

    申请号:US14028495

    申请日:2013-09-16

    申请人: Liam M. Healy

    发明人: Liam M. Healy

    IPC分类号: B64G1/24

    摘要: A technique to assist guidance techniques for a free-flying inspection vehicle for inspecting a host satellite. The method solves analytically in closed form for relative motion about a circular primary for solutions that are non-drifting, i.e., the orbital periods of the two vehicles are equal, computes the impulsive maneuvers in the primary radial and cross-track directions, and parameterizes these maneuvers and obtain solutions that satisfy constraints, for example collision avoidance or direction of coverage, or optimize quantities, such as time or fuel usage. Apocentral coordinates and a set of four relative orbital parameters are used. The method separates the change in relative velocity (maneuvers) into radial and crosstrack components and uses a waypoint technique to plan the maneuvers.

    摘要翻译: 协助用于检查主机卫星的自由飞行检查车辆的指导技术的技术。 该方法以封闭形式解析解,对于非漂移的解决方案,即圆形初级物体的相对运动,即两个车辆的轨道周期相等,计算主径向和横向方向上的冲击演习,并参数化 这些操纵并获得满足约束的解决方案,例如碰撞避免或覆盖方向,或优化数量,如时间或燃料使用。 使用中心坐标和一组四个相对轨道参数。 该方法将相对速度(机动)的变化分为径向和交叉分量,并使用航点技术来计划演习。