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11.
公开(公告)号:US07410130B2
公开(公告)日:2008-08-12
申请号:US10910430
申请日:2004-08-03
申请人: H. Grant Wang , David D. Needelman , Arun Prakash
发明人: H. Grant Wang , David D. Needelman , Arun Prakash
IPC分类号: B64G1/24
CPC分类号: B64G1/281 , B64G1/007 , B64G1/242 , B64G1/26 , B64G1/28 , B64G1/283 , B64G1/285 , B64G1/288 , B64G1/36 , B64G1/361 , B64G1/363 , B64G1/401 , B64G1/405 , B64G1/44 , B64G1/443 , G01C21/025 , G05D1/0883
摘要: A method of determining the attitude of a spinning spacecraft is provided. The method includes stabilizing the spacecraft, initializing the attitude of the spacecraft using star tracker data, and estimating the attitude of the spacecraft.
摘要翻译: 提供了一种确定旋转航天器姿态的方法。 该方法包括稳定航天器,使用星形跟踪器数据初始化航天器的姿态,并估计航天器的姿态。
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公开(公告)号:US5054101A
公开(公告)日:1991-10-01
申请号:US316716
申请日:1989-02-28
申请人: Arun Prakash
发明人: Arun Prakash
CPC分类号: G06K9/38
摘要: The locality of a two dimensional gray level image from which is generated a reference threshold value for converting the image to its corresponding binary image is determined by finding the fractal dimension of a hypothetical three dimensional surface overlying the two dimensional image.
摘要翻译: 通过找到覆盖二维图像的假想三维表面的分形维数来确定生成用于将图像转换成其对应二进制图像的参考阈值的二维灰度图像的位置。
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公开(公告)号:US08441641B1
公开(公告)日:2013-05-14
申请号:US13091389
申请日:2011-04-21
IPC分类号: G01J3/46
CPC分类号: G01J3/46 , G01J3/10 , G01J2003/467
摘要: The present disclosure is directed to a method for producing color spectral data of an article illuminated with lights emitted from one or more light emitting units, such as light emitting diodes (LEDs). The method is useful for obtaining accurate color spectral data of the article and for matching the color data produced from another color measuring instrument. The method is particularly useful for obtaining color spectral data using light emitting diodes as light source for color measurement. This disclosure is also directed to a color measuring system using the method disclosed therein.
摘要翻译: 本公开涉及一种用于产生由一个或多个发光单元(诸如发光二极管(LED))发射的光照射的物品的色谱数据的方法。 该方法对于获得物品的准确色谱数据和用于匹配由另一种颜色测量仪产生的颜色数据是有用的。 该方法对于使用发光二极管作为用于颜色测量的光源来获得颜色光谱数据特别有用。 本公开还涉及使用其中公开的方法的颜色测量系统。
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14.
公开(公告)号:US20050113986A1
公开(公告)日:2005-05-26
申请号:US10722756
申请日:2003-11-26
申请人: Arun Prakash , Hanching Wang
发明人: Arun Prakash , Hanching Wang
摘要: A method and apparatus for controlling a plurality of solar panels of a spacecraft is described. The method comprises the steps of providing a first step command to a first solar panel, and providing a second step command to a second solar panel at a time of a transient zero-crossing of a dynamic response of the spacecraft body to the first step command, wherein the second solar panel is disposed on an opposite side of the spacecraft from the first solar panel. The apparatus comprises a processor, a first solar panel driver, communicatively coupled to the processor, for providing a first step command to a first solar panel, and a second solar panel driver, communicatively coupled to the processor, for providing a second step command to a second solar panel at a time of a transient zero-crossing of a dynamic response of the spacecraft body to the first step command.
摘要翻译: 描述了一种用于控制航天器多个太阳能电池板的方法和装置。 该方法包括以下步骤:向第一太阳能电池板提供第一步骤命令,并且在航天器本体的动态响应与第一步骤命令的瞬时过零点时向第二太阳能电池板提供第二步骤命令 ,其中所述第二太阳能电池板设置在所述航天器与所述第一太阳能电池板相反的一侧。 该装置包括处理器,第一太阳能电池板驱动器,通信地耦合到处理器,用于向第一太阳能电池板提供第一步骤命令,以及通信地耦合到处理器的第二太阳能电池板驱动器,用于提供第二步骤命令 在宇宙飞船身体的动态响应与第一步骤命令的瞬时零交叉时的第二太阳能电池板。
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15.
公开(公告)号:US07343228B2
公开(公告)日:2008-03-11
申请号:US10722756
申请日:2003-11-26
申请人: Arun Prakash , Hanching Grant Wang
发明人: Arun Prakash , Hanching Grant Wang
摘要: A method and apparatus for controlling a plurality of solar panels of a spacecraft is described. The method comprises the steps of providing a first step command to a first solar panel, and providing a second step command to a second solar panel at a time of a transient zero-crossing of a dynamic response of the spacecraft body to the first step command, wherein the second solar panel is disposed on an opposite side of the spacecraft from the first solar panel. The apparatus comprises a processor; a first solar panel driver, communicatively coupled to the processor, for providing a first step command to a first solar panel, and a second solar panel driver, communicatively coupled to the processor, for providing a second step command to a second solar panel at a time of a transient zero-crossing of a dynamic response of the spacecraft body to the first step command.
摘要翻译: 描述了一种用于控制航天器多个太阳能电池板的方法和装置。 该方法包括以下步骤:向第一太阳能电池板提供第一步骤命令,并且在航天器本体的动态响应与第一步骤命令的瞬时过零点时向第二太阳能电池板提供第二步骤命令 ,其中所述第二太阳能电池板设置在所述航天器与所述第一太阳能电池板相反的一侧。 该装置包括处理器; 第一太阳能电池板驱动器,通信地耦合到处理器,用于向第一太阳能电池板提供第一步骤命令,以及通信地耦合到处理器的第二太阳能电池板驱动器,用于在第二太阳能电池板的第二太阳能电池板上提供第二步骤命令 航天器身体的动态响应与第一步骤命令的瞬时过零点的时间。
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16.
公开(公告)号:US20050133671A1
公开(公告)日:2005-06-23
申请号:US10910430
申请日:2004-08-03
申请人: H. Wang , David Needelman , Arun Prakash
发明人: H. Wang , David Needelman , Arun Prakash
IPC分类号: B64G1/00 , B64G1/24 , B64G1/26 , B64G1/28 , B64G1/36 , B64G1/40 , B64G1/44 , G01C21/02 , G05D1/08 , B64G1/38
CPC分类号: B64G1/281 , B64G1/007 , B64G1/242 , B64G1/26 , B64G1/28 , B64G1/283 , B64G1/285 , B64G1/288 , B64G1/36 , B64G1/361 , B64G1/363 , B64G1/401 , B64G1/405 , B64G1/44 , B64G1/443 , G01C21/025 , G05D1/0883
摘要: A method of determining the attitude of a spinning spacecraft is provided. The method includes stabilizing the spacecraft, initializing the attitude of the spacecraft using star tracker data, and estimating the attitude of the spacecraft.
摘要翻译: 提供了一种确定旋转航天器姿态的方法。 该方法包括稳定航天器,使用星形跟踪器数据初始化航天器的姿态,并估计航天器的姿态。
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公开(公告)号:US5153844A
公开(公告)日:1992-10-06
申请号:US469644
申请日:1990-01-23
申请人: Joseph A. Beni , Michael J. Merrill , Arun Prakash , John Taylor
发明人: Joseph A. Beni , Michael J. Merrill , Arun Prakash , John Taylor
IPC分类号: G01B11/30
CPC分类号: G01B11/306
摘要: This invention relates to a method and apparatus for determining the flatness or planarity of a surface and, specifically, to a method and apparatus for determining the flatness or planarity of a surface using a computerized optics technique.
摘要翻译: 本发明涉及一种用于确定表面的平坦度或平面度的方法和装置,具体地说,涉及使用计算机化光学技术确定表面的平坦度或平面度的方法和装置。
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