专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080046138A1 Method for compensating star motion induced error in a stellar inertial attitude determination system 有权
标题翻译：用于补偿恒星惯性姿态测定系统中星星运动误差的方法
公开(公告)号：US20080046138A1
公开(公告)日：2008-02-21
申请号：US11221646
申请日：2005-09-07
申请人： Richard Fowell , Rongsheng Li , Yeong-Wei Wu
发明人： Richard Fowell , Rongsheng Li , Yeong-Wei Wu
IPC分类号： B64G1/36
CPC分类号： B64G1/36 , G05D1/0883
摘要： A method for controlling an actuator of a vehicle comprises providing a dynamic condition sensor generating a vehicle movement signal and a position sensor for generating a reported position. A processor is coupled to the inertial sensor and the position sensor and comprises an estimator, a position measurement predictor having a filter, a comparator and a control shaping block, said estimator generating a vehicle position based upon the dynamic condition sensor, said position measurement predictor generating an estimated position measurement in response to the reported vehicle position and a matched frequency response to the movement signal, said control shaping block generating an actuator control signal in response to a comparison of the estimated position measurement and the reported vehicle position.
摘要翻译：一种用于控制车辆的致动器的方法包括提供产生车辆运动信号的动态条件传感器和用于产生报告位置的位置传感器。处理器耦合到惯性传感器和位置传感器，并且包括估计器，具有滤波器的位置测量预测器，比较器和控制整形块，所述估计器基于动态条件传感器产生车辆位置，所述位置测量预测器响应于所报告的车辆位置和对所述移动信号的匹配的频率响应来产生估计位置测量，所述控制整形块响应于所估计的位置测量和报告的车辆位置的比较而产生致动器控制信号。

2. 发明授权

US06863244B2 Mitigation of angular acceleration effects on optical sensor data 有权
标题翻译：减小角加速度对光学传感器数据的影响
公开(公告)号：US06863244B2
公开(公告)日：2005-03-08
申请号：US10360020
申请日：2003-02-07
申请人： Richard A. Fowell , Salma I. Saeed , Rongsheng Li , Yeong-Wei Wu
发明人： Richard A. Fowell , Salma I. Saeed , Rongsheng Li , Yeong-Wei Wu
IPC分类号： B64G1/28 , B64G1/36 , B64G1/24
CPC分类号： B64G1/361 , B64G1/288 , B64G1/36 , B64G1/363 , B64G1/365
摘要： A method, apparatus, article of manufacture, and a memory structure for compensating for optical sensor data corrupted by angular acceleration is disclosed. The method comprises the steps of determining an angular acceleration of the optical sensor and modifying the optical sensor data according to the determined angular acceleration of the optical sensor. The apparatus comprises a sensor for determining an angular acceleration of the optical sensor and a navigation system for modifying the optical sensor data according to the determined angular acceleration of the optical sensor.
摘要翻译：公开了一种用于补偿由角加速度损坏的光学传感器数据的方法，装置，制品和存储结构。该方法包括以下步骤：根据确定的光学传感器的角加速度确定光学传感器的角加速度并修改光学传感器数据。该装置包括用于确定光学传感器的角加速度的传感器和用于根据确定的光学传感器的角加速度来修改光学传感器数据的导航系统。

3. 发明授权

US06615117B2 Attitude determination system and method with outer-loop gyro scale-factor non-linearity calibration 失效
标题翻译：具有外环陀螺比例因子非线性校准的姿态测定系统和方法
公开(公告)号：US06615117B2
公开(公告)日：2003-09-02
申请号：US09993022
申请日：2001-11-13
申请人： Rongsheng Li , Yeong-Wei Wu , David L. Augenstein
发明人： Rongsheng Li , Yeong-Wei Wu , David L. Augenstein
IPC分类号： G06F1900
CPC分类号： B64G1/36 , B64G1/26 , B64G1/285 , B64G1/288 , B64G1/32 , B64G1/361 , B64G1/363 , B64G1/365 , B64G1/366
摘要： A method and apparatus for calibrating rate sensor measurements to compensate for rate sensor scale factor non-linearities. An outer loop compensator compares current rate sensor scale factor estimates with the current scale factor non-linearity compensation, and deviations from the current non-linearity compensation are corrected in an updated compensation.
摘要翻译：用于校准速率传感器测量以补偿速率传感器比例因子非线性的方法和装置。外部环路补偿器将当前速率传感器比例因子估计与当前比例因子非线性补偿进行比较，并且在更新的补偿中校正与当前非线性补偿的偏差。

4. 发明授权

US06566640B2 System and method for autonomous correction of star tracker high spatial frequency (HSF) error 有权
标题翻译：星际跟踪器高空间频率（HSF）误差自主校正的系统和方法
公开(公告)号：US06566640B2
公开(公告)日：2003-05-20
申请号：US09961704
申请日：2001-09-24
申请人： Yeong-Wei Wu , Rongsheng Li
发明人： Yeong-Wei Wu , Rongsheng Li
IPC分类号： G01J120
CPC分类号： B64G1/361 , B64G1/288 , G01C21/025
摘要： A method and apparatus for post processing a star tracker measurement to remove a systematic error characterizable at least in part by a pixel phase is disclosed. The method comprises the steps of computing the pixel phase along a first axis from a measured star position and a star tracker characteristic, computing a first axis error correction according to the computed pixel phase, and computing a compensated first axis star tracker measurement according to the measured star position and the first axis error correction.
摘要翻译：公开了用于后处理星形跟踪器测量以去除至少部分由像素相位表征的系统误差的方法和装置。该方法包括以下步骤：从测量的星形位置和星形跟踪器特性计算沿着第一轴的像素相位，根据所计算的像素相位计算第一轴误差校正，以及根据所计算的像素相位计算补偿的第一轴星形跟踪器测量测量星座位置和第一轴误差校正。

5. 发明申请

US20050071055A1 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：US20050071055A1
公开(公告)日：2005-03-31
申请号：US10945671
申请日：2004-09-21
申请人： David Needelman , Rongsheng Li , Yeong-Wei Wu
发明人： David Needelman , Rongsheng Li , Yeong-Wei Wu
IPC分类号： B64G1/36 , G01C21/02 , G01S3/786 , G06F17/00
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。

6. 发明授权

US06588708B2 Spacecraft methods and structures for acquiring and determining power-safe attitudes 有权
标题翻译：用于获取和确定电力安全态度的航天器方法和结构
公开(公告)号：US06588708B2
公开(公告)日：2003-07-08
申请号：US09771916
申请日：2001-01-29
申请人： Grant Wang , Yeong-Wei Wu , Rongsheng Li , David D. Needelman
发明人： Grant Wang , Yeong-Wei Wu , Rongsheng Li , David D. Needelman
IPC分类号： B64G136
CPC分类号： B64G1/361 , B64G1/428 , B64G1/44
摘要： The present invention is directed to spacecraft that have, for any reason, lost the spacecraft's service attitude that permits it to carry out the service operations for which it was designed. The invention provides methods and structures for acquiring and determining a power-safe attitude (i.e., one in which wing current is sufficient to support the spacecraft's housekeeping operations) from which the spacecraft can be subsequently returned to a service attitude. The methods are particularly useful because they a) require only a single star tracker for sensing attitude, comprise simple maneuvers, and typically acquire a power-safe attitude that does not significantly differ from the spacecraft's service attitude to thereby reduce the spacecraft's return-to-service time.
摘要翻译：本发明涉及由于任何原因丢失航天器的服务态度而允许其执行其设计的服务操作的航天器。本发明提供了用于获取和确定动力安全姿态（即其中机翼电流足以支持航天器内务处理操作）的方法和结构，由此航天器可随后返回到服务态度。这些方法特别有用，因为它们只需要一个单一的星形跟踪器来感测姿态，包括简单的操作，并且通常获得与航天器的服务态度没有显着差异的电力安全姿态，从而减少航天器的返回 - 服务时间。

7. 发明申请

US20050246072A1 METHOD AND APPARATUS FOR REAL-TIME STAR EXCLUSION FROM A DATABASE 有权
标题翻译：从数据库中实时排除星号的方法和设备
公开(公告)号：US20050246072A1
公开(公告)日：2005-11-03
申请号：US10709346
申请日：2004-04-29
申请人： David Needelman , Rongsheng Li , Richard Fowell , Peter Lai , Yeong-Wei Wu , Bruce Eyerly , Jonathan French
发明人： David Needelman , Rongsheng Li , Richard Fowell , Peter Lai , Yeong-Wei Wu , Bruce Eyerly , Jonathan French
IPC分类号： B64C1/00 , B64G1/36 , G01C21/26 , G01C22/00
CPC分类号： B64G1/361 , G01C22/00
摘要： A vehicle (12) including a control system (18) is used for controlling vehicle attitude or angular velocity (38). The processor (24) is coupled to a star sensor or tracker (22) and a memory (30) that may include a star catalog (32), and an exclusion list (36). The exclusion list (36), a list of stars to be temporarily excluded from consideration when determining attitude or angular velocity or relative alignment of star sensors or trackers, is calculated on-board. Such a calculation prevents the necessity for a costly, periodic, ground calculation and upload of such data. By manipulating the star catalog, or sub-catalogs derived from said catalog, based upon the exclusion list (36), measurements of such excluded stars are prevented from corrupting the attitude or angular velocity or alignment estimates formulated on board.
摘要翻译：包括控制系统（18）的车辆（12）用于控制车辆姿态或角速度（38）。处理器（24）耦合到星形传感器或跟踪器（22）和可包括星形目录（32）的存储器（30）和排除列表（36）。排除列表（36），在确定姿态或角速度或星形传感器或跟踪器的相对对齐时暂时排除考虑的恒星列表。这样的计算可以防止对这些数据进行昂贵，周期性，地面计算和上传的必要性。通过根据排除列表（36）操纵从所述目录导出的星号目录或子目录，防止这些排除的星星的测量破坏了在船上制定的姿态或角速度或对准估计。

8. 发明授权

US06460809B1 Spacecraft methods and systems for autonomous correction of star tracker charge-transfer-efficiency errors 有权
标题翻译：航天器方法和系统，用于自动校正星形跟踪器电荷转移效率误差
公开(公告)号：US06460809B1
公开(公告)日：2002-10-08
申请号：US09769637
申请日：2001-01-25
申请人： Yeong-Wei Wu , Rongsheng Li , James H. Green
发明人： Yeong-Wei Wu , Rongsheng Li , James H. Green
IPC分类号： B64G136
CPC分类号： G05D1/0883 , B64G1/26 , B64G1/288 , B64G1/361 , B64G2001/245
摘要： Structures and methods are provided for deriving corrected star coordinates Ccrctd from measured star coordinates Cms that include star tracker charge transfer efficiency (CTE) errors. The structures and methods are based on a recognition that measured star coordinates Cms of star image centroids include CTE errors which are functions of the CCD path lengths over which the associated electrical charges traveled. In particular, the errors are substantially a product of a respective path length and a star-coordinate error factor &xgr; which, in turn, is a function of the star image magnitudes msi. Information contained in different measured star coordinates Cms is organized to facilitate the derivation of an estimate &xgr;* of the star-coordinate error factor &xgr; with conventional estimation processes. The measured star coordinates Cms are then corrected with the error factor estimate &xgr;* to realize the corrected star coordinates Ccrctd and, thereby, improve the accuracy of spacecraft attitude control.
摘要翻译：提供了结构和方法，用于从包括星形跟踪器电荷转移效率（CTE）误差的测量的星座坐标Cms导出校正星座标Ccrctd。结构和方法基于识别，星形图像质心的测量星座坐标Cms包括作为相关电荷行进的CCD路径长度的函数的CTE误差。特别地，误差基本上是相应的路径长度和星坐标误差因子＆xgr的乘积; 这又是星形图像幅度msi的函数。包含在不同测量星座坐标Cms中的信息被组织以便于推导星坐标误差因子＆xgr的估计＆xgr * 与传统的估计过程。然后用误差因子估计＆xgr *来校正测量的星座Cms，以实现校正的星座Ccrctd，从而提高航天器姿态控制的精度。

9. 发明授权

US6108594A Autonomous attitude acquisition for a stellar inertial attitude determination system 失效
标题翻译：一种恒星惯性姿态测定系统的自主态度采集
公开(公告)号：US6108594A
公开(公告)日：2000-08-22
申请号：US87409
申请日：1998-05-29
申请人： Garry Didinsky , Yeong-Wei Wu , Rongsheng Li , Arunkumar Nayak , Douglas Hein
发明人： Garry Didinsky , Yeong-Wei Wu , Rongsheng Li , Arunkumar Nayak , Douglas Hein
IPC分类号： B64G1/28 , B64G1/36 , G01C21/02 , G01S3/781 , G01S5/16 , G05D1/08 , G06F165/00
CPC分类号： G01C21/025 , B64G1/361 , G01S3/781 , G01S5/163 , G05D1/0883 , B64G1/288
摘要： A method and apparatus for autonomous acquisition of attitude in a stellar inertial spacecraft attitude system is disclosed. The present invention uses star trackers, an on-board star catalog, spacecraft steering and inertial sensors to determine spacecraft attitude. The present invention utilizes pattern match and pattern rejection methods and uses multiple stellar snap-shots in conjunction with spacecraft steering and spacecraft inertial measurements to acquire spacecraft attitude. Spacecraft inertial measurements are used to connect multiple stellar snap-shots to provide adequate star information that can be used to acquire spacecraft attitude. In an attitude determination system using star trackers, the star trackers may have a narrow field-of-view or few stars may be available for viewing. The present invention uses pattern matching and pattern rejection on different sets of stars, thereby allowing attitude acquisition when the number of stars in view is small.
摘要翻译：公开了一种用于在恒星惯性航天器姿态系统中自动获取姿态的方法和装置。本发明使用星形跟踪器，一个车载星形目录，航天器转向和惯性传感器来确定航天器的姿态。本发明利用模式匹配和模式排斥方法，并结合航天器转向和航天器惯性测量使用多个恒星卡扣，以获得航天器的姿态。航天器惯性测量用于连接多个恒星快照，以提供可用于获取航天器姿态的足够的星级信息。在使用星形跟踪器的态度确定系统中，星形跟踪器可以具有窄的视场或几颗恒星可用于观看。本发明在不同的星星集合上使用模式匹配和模式抑制，从而当观看的星星数量小时允许姿态采集。

10. 发明申请

US20060149474A1 Real-time refinement method of spacecraft star tracker alignment estimates 有权
标题翻译：航天器星形跟踪器对准估计的实时优化方法
公开(公告)号：US20060149474A1
公开(公告)日：2006-07-06
申请号：US11028094
申请日：2005-01-03
申请人： David Needelman , Rongsheng Li , Yeong-Wei Wu
发明人： David Needelman , Rongsheng Li , Yeong-Wei Wu
IPC分类号： G01C21/26
CPC分类号： B64G1/361 , G01C21/025 , G01S3/7867
摘要： A method of estimating the alignment of a star sensor (20) for a vehicle (12) includes generating star tracker data. A vehicle attitude and a star sensor attitude are determined in response to the star tracker data. A current alignment sample is generated in response to the vehicle attitude and the star sensor attitude. A current refined estimate alignment signal is generated in response to the current alignment sample and a previously refined estimate alignment signal via a vehicle on-board filter (38).
摘要翻译：估计用于车辆（12）的星形传感器（20）的对准的方法包括产生星形跟踪器数据。响应于星形跟踪器数据确定车辆姿态和星形传感器姿态。响应于车辆姿态和星形传感器姿态产生当前的对准样品。响应于当前对准样本和经由车载过滤器（38）的先前精确的估计对准信号，产生当前精细估计对准信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式