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1. 发明授权

US07877173B2 Method and apparatus for determining a satellite attitude using crosslink reference signals 有权
标题翻译：使用交联参考信号确定卫星姿态的方法和装置
公开(公告)号：US07877173B2
公开(公告)日：2011-01-25
申请号：US11825207
申请日：2007-07-05
申请人： Ketao Liu , Yeong-Wei A. Wu
发明人： Ketao Liu , Yeong-Wei A. Wu
IPC分类号： G05D1/00
CPC分类号： G01S5/0247 , B64G1/1085 , B64G1/24 , B64G1/285 , B64G1/32 , B64G1/361 , B64G1/363 , B64G1/365 , B64G1/366 , B64G1/407 , B64G1/44 , B64G1/66 , B64G2001/245
摘要： A method and apparatus for determining the attitude of a satellite using crosslink information is disclosed. The method and apparatus integrates data from the crosslinks with data available from other sources including, for example, star sensors, inertial sensors, and earth limb sensors to derive an accurate estimate of the satellite attitude, even in harsh nuclear environments.
摘要翻译：公开了一种使用交联信息确定卫星姿态的方法和装置。该方法和装置将来自交联的数据与来自其他来源的数据（例如，星形传感器，惯性传感器和地球肢体传感器）集成，以得到卫星姿态的准确估计，即使在恶劣的核环境中。

2. 发明申请

US20090012662A1 Method and apparatus for determining a satellite attitude using crosslink reference signals 有权
标题翻译：使用交联参考信号确定卫星姿态的方法和装置
公开(公告)号：US20090012662A1
公开(公告)日：2009-01-08
申请号：US11825207
申请日：2007-07-05
申请人： Ketao Liu , Yeong-Wei A. Wu
发明人： Ketao Liu , Yeong-Wei A. Wu
IPC分类号： G01C21/24
CPC分类号： G01S5/0247 , B64G1/1085 , B64G1/24 , B64G1/285 , B64G1/32 , B64G1/361 , B64G1/363 , B64G1/365 , B64G1/366 , B64G1/407 , B64G1/44 , B64G1/66 , B64G2001/245
摘要： A method and apparatus for determining the attitude of a satellite using crosslink information is disclosed. The method and apparatus integrates data from the crosslinks with data available from other sources including, for example, star sensors, inertial sensors, and earth limb sensors to derive an accurate estimate of the satellite attitude, even in harsh nuclear environments.
摘要翻译：公开了一种使用交联信息确定卫星姿态的方法和装置。该方法和装置将来自交联的数据与来自其他来源的数据（例如，星形传感器，惯性传感器和地球肢体传感器）集成，以得到卫星姿态的准确估计，即使在恶劣的核环境中。

3. 发明申请

US20080129242A1 SCALE FACTOR CALIBRATION AND COMPENSATION FOR ANGULAR POSITION RESOLVER 有权
标题翻译：标准因子校准和补偿用于角位置分辨率
公开(公告)号：US20080129242A1
公开(公告)日：2008-06-05
申请号：US12019513
申请日：2008-01-24
申请人： Ketao Liu , Yeong-Wei A. Wu , Jeffrey L. Lee
发明人： Ketao Liu , Yeong-Wei A. Wu , Jeffrey L. Lee
IPC分类号： G05B19/31
CPC分类号： G01D5/208 , G01D3/02
摘要： In accordance with an embodiment of the present invention, a resolver system has at least one resolver and at least one amplifier in electrical communication with each resolver. A reference circuit is in electrical communication with the amplifiers. The reference circuit provides reference signals to the amplifiers. A non-linearity calibration and compensation circuit in communication with each amplifier uses the amplified reference signals to provide scale factors, so as to enhance a precision of the resolver system.
摘要翻译：根据本发明的实施例，旋转变压器系统具有至少一个分解器和至少一个与每个旋转变压器电连通的放大器。参考电路与放大器电连通。参考电路为放大器提供参考信号。与每个放大器通信的非线性校准和补偿电路使用放大的参考信号来提供比例因子，以提高旋转变压器系统的精度。

4. 发明授权

US07310578B2 Fast access, low memory, pair catalog 有权
标题翻译：快速访问，低内存，配对目录
公开(公告)号：US07310578B2
公开(公告)日：2007-12-18
申请号：US10710177
申请日：2004-06-24
申请人： James P. Alstad , David D. Needelman , Rongsheng Li , Richard A. Fowell , Peter C. Lai , Yeong-Wei A. Wu
发明人： James P. Alstad , David D. Needelman , Rongsheng Li , Richard A. Fowell , Peter C. Lai , Yeong-Wei A. Wu
IPC分类号： G06F7/76
CPC分类号： G01S3/7867 , B64G1/361
摘要： A system (18) includes: a) A vehicle (12) includes an attitude or angular velocity control system (38), a plurality of star trackers or star sensors (22) each having a field of view (28); b) a memory (30) having a star catalog (32), a star pair catalog (58) and a reference table (56) stored therein; and c) a processor (24) coupled to the attitude or angular velocity control system (38), the star trackers or star sensors (22), and the memory (30). The processor (24) determines the vehicle inertial attitude or angular velocity or sensor alignment, based, in part, on the star pair catalog (58) and reference table (56). The design of the star pair catalog (58) and reference table (56) is suitable for rapid determination of attitude or angular velocity or sensor alignment, and an efficient use of memory.
摘要翻译：系统（18）包括：a）车辆（12）包括姿态或角速度控制系统（38），多个星形跟踪器或星形传感器（22），每个具有视野（28）; b）具有星号目录（32），存储在其中的星形目录（58）和参考表（56）的存储器（30）和c）联接到姿态或角速度控制系统（38），星形跟踪器或星形传感器（22）和存储器（30）的处理器（24）。处理器（24）部分地基于星形对目录（58）和参考表（56）确定车辆惯性姿态或角速度或传感器对准。星形目录（58）和参考表（56）的设计适用于快速确定姿态或角速度或传感器对准，并有效利用存储器。

5. 发明授权

US07136752B2 Method and apparatus for on-board autonomous pair catalog generation 有权
标题翻译：用于车载自主对目录生成的方法和装置
公开(公告)号：US07136752B2
公开(公告)日：2006-11-14
申请号：US10710178
申请日：2004-06-24
申请人： David D. Needelman , Rongsheng Li , Richard A. Fowell , Peter C. Lai , Yeong-Wei A. Wu
发明人： David D. Needelman , Rongsheng Li , Richard A. Fowell , Peter C. Lai , Yeong-Wei A. Wu
IPC分类号： G05D1/00 , G01C21/02
CPC分类号： G01C21/025 , B64G1/361 , G01C21/24
摘要： A system (18) includes: a) A vehicle (12) includes an attitude or angular velocity control system (38), a plurality of star trackers or star sensors (22) each having a field of view (28); b) a memory (30) having a star catalog (32), an allocated area for a star pair catalog (58) and a reference table (56) stored therein; and c) a processor (24) coupled to the attitude or angular velocity control system (38), the star trackers or star sensors (22), and the memory (30). The processor (24) populates the star pair catalog (58), using the method described herein. The processor (24) then periodically determines the vehicle inertial attitude or angular velocity or sensor alignment, based, in part, on the star pair catalog (58) and reference table (56). The novel ability of the software to autonomously populate the star pair catalog (58) allows users to avoid uploading a large amount of data, and the problems associated with such an upload.
摘要翻译：系统（18）包括：a）车辆（12）包括姿态或角速度控制系统（38），多个星形跟踪器或星形传感器（22），每个具有视野（28）; b）具有星号目录（32），存储在其中的星形目录（58）和参考表（56）的分配区域的存储器（30）和c）联接到姿态或角速度控制系统（38），星形跟踪器或星形传感器（22）和存储器（30）的处理器（24）。处理器（24）使用本文所述的方法填充星形对目录（58）。处理器（24）然后部分地基于星形对目录（58）和参考表（56）周期性地确定车辆惯性姿态或角速度或传感器对准。软件自主填充星形目录（58）的新颖功能允许用户避免上传大量数据，以及与此类上传相关的问题。

6. 发明授权

US07062363B2 Refinement of spacecraft angular velocity and attitude estimates using star data 有权
标题翻译：使用星级数据对航天器角速度和姿态估计进行细化
公开(公告)号：US07062363B2
公开(公告)日：2006-06-13
申请号：US10945671
申请日：2004-09-21
申请人： David D. Needelman , Rongsheng Li , Yeong-Wei A. Wu
发明人： David D. Needelman , Rongsheng Li , Yeong-Wei A. Wu
IPC分类号： G01C21/02
CPC分类号： G01C21/025 , B64G1/361 , G01S3/7867
摘要： A method and apparatus for refining a spacecraft state estimate, such as an attitude estimate or an angular velocity estimate, is disclosed. The method computes a plurality equations using residuals describing the difference between observed star positions and predicted positions based on inertial measurements, and solves those equations to generate refined estimates of the spacecraft state estimates.
摘要翻译：公开了一种用于精制航天器状态估计的方法和装置，例如姿态估计或角速度估计。该方法使用基于惯性测量描述观察到的星座位置和预测位置之间的差的残差来计算多个方程，并且求解这些等式以产生航天器状态估计的精确估计。

7. 发明授权

US06595469B2 Attitude control methods and systems for multiple-payload spacecraft 有权
标题翻译：多载荷航天器的姿态控制方法和系统
公开(公告)号：US06595469B2
公开(公告)日：2003-07-22
申请号：US10039474
申请日：2001-10-28
申请人： Rongsheng Li , Yeong-Wei A. Wu , Hanching Grant Wang
发明人： Rongsheng Li , Yeong-Wei A. Wu , Hanching Grant Wang
IPC分类号： B04G122
CPC分类号： G05D1/0883 , B64G1/24 , B64G1/26 , B64G1/285 , B64G1/288 , B64G1/36 , B64G1/361 , B64G1/363 , B64G1/365 , B64G1/66 , Y10S343/02
摘要： Attitude determination and control systems are provided that combine attitude measurements from all spacecraft payloads to determine a master attitude estimate for a master payload and relative slave attitude estimates for the remaining slave payloads. These estimates are then used to control the attitudes of spacecraft elements that correct the absolute and relative attitude errors. These systems significantly enhance attitude accuracy when compared to systems that realize independent payload estimates, determine payload attitudes. These systems also provide significant processing advantages (e.g., simpler algorithms, reduced data throughput and slower processing rate).
摘要翻译：提供了姿态确定和控制系统，其结合来自所有航天器有效载荷的姿态测量，以确定主载荷的主姿态估计以及剩余从动载荷的相对从属姿态估计。然后将这些估计值用于控制航天器元件的态度，以纠正绝对和相对姿态误差。与实现独立有效负载估计，确定有效载荷态度的系统相比，这些系统显着提高了姿态精度。这些系统还提供显着的处理优点（例如，更简单的算法，减少的数据吞吐量和较慢的处理速率）。

8. 发明授权

US06512979B1 Lost-in-space stellar attitude acquisition using multiple star trackers 有权
公开(公告)号：US06512979B1
公开(公告)日：2003-01-28
申请号：US10177238
申请日：2002-06-21
申请人： David D. Needelman , Yeong-Wei A. Wu , Rongsheng Li , William L. Burkett, Jr.
发明人： David D. Needelman , Yeong-Wei A. Wu , Rongsheng Li , William L. Burkett, Jr.
IPC分类号： G01C2124
CPC分类号： G01C21/025 , B64G1/26 , B64G1/285 , B64G1/288 , B64G1/32 , B64G1/361 , B64G1/363 , B64G1/366 , B64G1/42 , G01S5/163 , G05D1/0883
摘要： A method, apparatus, article of manufacture for determining the attitude of a spacecraft having at least one star sensor. The method comprises the steps of selecting a first reference star sensor from among the star sensors; designating two stars observed by the first reference star sensor as a primary star pair; identifying a candidate star pair corresponding to the primary star pair, wherein the candidate star pair is selected from a star catalog having a plurality of entries; estimating an inertial orientation of the first star sensor at least in part from the identified candidate star pair; and determining the spacecraft attitude from the estimated inertial orientation of a reference star sensor selected from a group comprising the first star sensor.

9. 发明授权

US06272432B1 System and method for correcting star tracker low spatial frequency error in stellar-inertial attitude determination systems 失效
标题翻译：用于校正恒星惯性姿态测定系统中星际跟踪器低空间频率误差的系统和方法
公开(公告)号：US06272432B1
公开(公告)日：2001-08-07
申请号：US09309034
申请日：1999-05-10
申请人： Rongsheng Li , Yeong-Wei A. Wu , Douglas H. Hein , Garry Didinsky
发明人： Rongsheng Li , Yeong-Wei A. Wu , Douglas H. Hein , Garry Didinsky
IPC分类号： G01C2102
CPC分类号： G01C21/025 , B64G1/288 , B64G1/361 , B64G1/363 , B64G1/365 , G05D1/0883
摘要： A system and method of estimating the attitude of a spacecraft compares a three-axis inertial-based estimate of spacecraft attitude to a stellar-based estimate of the spacecraft attitude. A Kalman filter having some states associated with low spatial frequency errors compares the stellar-based attitude estimate to the inertial-based estimate of attitude and apportions total attitude error into two time varying matrices. A first time varying matrix is associated with star tracker low spatial frequency errors, a second time varying matrix is associated with gyro bias errors and attitude errors. The time varying matrices are used to apply corrective feedbacks to the stellar-based attitude estimate and the inertial-based estimate of spacecraft attitude, and are adaptively adjusted to minimize total estimated attitude error.
摘要翻译：估计航天器态度的系统和方法将基于三轴惯性的航天器姿态估计与基于恒星的航天器姿态估计进行比较。具有与低空间频率误差相关联的一些状态的卡尔曼滤波器将基于星态的姿态估计与基于惯性的姿态估计和总姿态误差分配成两个时变矩阵进行比较。第一时变矩阵与星形跟踪器低空间频率误差相关联，第二时变矩阵与陀螺仪偏置误差和姿态误差相关联。时变矩阵用于对基于恒星的姿态估计和基于惯性的航天器姿态估计应用校正反馈，并进行自适应调整以最小化总估计姿态误差。

10. 发明授权

US5836165A Adaptive feedforward vibration control system and method 失效
标题翻译：自适应前馈振动控制系统及方法
公开(公告)号：US5836165A
公开(公告)日：1998-11-17
申请号：US739634
申请日：1996-10-30
申请人： Shaun L. Champion , Yeong-Wei A. Wu , Michael H. Kieffer
发明人： Shaun L. Champion , Yeong-Wei A. Wu , Michael H. Kieffer
IPC分类号： F16F15/02 , F25B9/14 , G05D19/02 , F01B29/08 , F25B9/00
CPC分类号： F16F15/02 , G05D19/02 , F25B2500/13 , F25B9/14
摘要： An adaptive feedforward vibration control system reduces vibrations at fundamental and harmonic frequencies of matched reciprocating pistons, such as back-to-back compressor pistons in Stirling cycle cryocooler, by driving the pistons with correction signals. The system is also applicable to reducing the vibrations generated by a pair of opposite expander and balancer pistons in a cryocooler. The correction signals are computed iteratively to increase their accuracy, and need only be updated relatively infrequently to adjust the pistons' motions, thereby enabling the use of a relatively slow microprocessor.
摘要翻译：自适应前馈振动控制系统通过用校正信号驱动活塞来减少匹配往复运动的基波和谐波频率的振动，例如斯特林循环低温冷却器中的背靠背压缩机活塞。该系统还适用于减少在低温冷却器中由一对相对的膨胀器和平衡器活塞产生的振动。迭代地计算校正信号以增加它们的准确度，并且仅需要相对不频繁地更新以调节活塞的运动，从而能够使用相对较慢的微处理器。

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