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1. 发明授权

US10126324B2 Dynamic self-calibration of an accelerometer system 有权
公开(公告)号：US10126324B2
公开(公告)日：2018-11-13
申请号：US15615438
申请日：2017-06-06
申请人： Robert E. Stewart , Michael D. Bulatowicz
发明人： Robert E. Stewart , Michael D. Bulatowicz
IPC分类号： G01P21/00 , G01P15/125 , G01P15/13 , G01P15/08
摘要： One embodiment includes a method for dynamic self-calibration of an accelerometer system. The method includes forcing a proof-mass associated with a sensor of the accelerometer system in a first direction to a first predetermined position and obtaining a first measurement associated with the sensor in the first predetermined position via at least one force/detection element of the sensor. The method also includes forcing the proof-mass to a second predetermined position and obtaining a second measurement associated with the sensor in the second predetermined position via the at least one force/detection element of the sensor. The method further includes calibrating the accelerometer system based on the first and second measurements.

2. 发明授权

US09970471B2 Direct tension indicator plate and assembly 有权
公开(公告)号：US09970471B2
公开(公告)日：2018-05-15
申请号：US14949930
申请日：2015-11-24
申请人： Robert E. Stewart , Nicholas Strumbos
发明人： Robert E. Stewart , Charles Lee Dardas
IPC分类号： F16B31/02
CPC分类号： F16B31/028 , F16B31/02
摘要： A direct tension indicator plate, washer assembly, and fastener assembly. The plate includes an annular array of circumferentially-spaced legs extending radially outwardly from a hub, wherein each leg includes a foot portion oriented at least partially in a circumferential direction. The washer assembly includes an indicator plate carried by a washer plate having an annular array of protuberances projecting from a surface, a portion of the indicator plate being carried on the protuberances. The fastener assembly includes a fastener having an axially facing surface positioned against an annular portion of an indicator plate to sandwich the annular portion between the axially facing surface and an array of protuberances of a washer plate, wherein, when the fastener is fastened against the washer plate placing the indicator plate in compression with the washer plate, the array of legs are displaced radially outwardly.

3. 发明申请

US20170284802A1 VIBRATING-MASS GYROSCOPE SYSTEMS AND METHOD 审中-公开
公开(公告)号：US20170284802A1
公开(公告)日：2017-10-05
申请号：US15621666
申请日：2017-06-13
申请人： ROBERT E. STEWART
发明人： ROBERT E. STEWART
IPC分类号： G01C19/5705 , G01C19/5733
摘要： A vibrating-mass gyroscope system includes a substantially planar vibrating-mass including opposite first and second surfaces and electrodes that extend longitudinally in a periodic pattern across the first and/or second surfaces. The electrodes include sets of drive and sense electrodes that are capacitively coupled to respective matching sets of drive and sense electrodes associated with a housing and which are separated from and facing the respective first and second surfaces. A gyroscope controller generates a drive signal provided to one of the array of drive electrodes and the substantially matching array of drive electrodes to provide for in-plane periodic oscillatory motion of the vibrating-mass, and generates a force-rebalance signal that is provided to one of the array of sense electrodes and the substantially matching array of sense electrodes to calculate rotation of the vibrating-mass gyroscope system about an input axis.

4. 发明授权

US09726491B2 Vibrating-mass gyroscope systems and method 有权
公开(公告)号：US09726491B2
公开(公告)日：2017-08-08
申请号：US14341380
申请日：2014-07-25
申请人： Robert E. Stewart
发明人： Robert E. Stewart
IPC分类号： G01C19/5705 , G01C19/5733
CPC分类号： G01C19/5705 , G01C19/5733
摘要： One embodiment of the invention includes a vibrating-mass gyroscope system. A sensor system includes a substantially planar vibrating-mass including opposite first and second surfaces and electrodes that extend longitudinally in a periodic pattern across the first and/or second surfaces. The electrodes include sets of drive and sense electrodes that are capacitively coupled to respective matching sets of drive and sense electrodes associated with a housing and which are separated from and facing the respective first and second surfaces. A gyroscope controller generates a drive signal provided to one of the array of drive electrodes and the substantially matching array of drive electrodes to provide for in-plane periodic oscillatory motion of the vibrating-mass, and generates a force-rebalance signal that is provided to one of the array of sense electrodes and the substantially matching array of sense electrodes to calculate rotation of the vibrating-mass gyroscope system about an input axis.

5. 发明授权

US09719550B2 Pawl-and-ratchet lockable threaded fastener assembly 有权
公开(公告)号：US09719550B2
公开(公告)日：2017-08-01
申请号：US14861002
申请日：2015-09-22
申请人： Robert E. Stewart , Nicholas Strumbos
发明人： Robert E. Stewart
IPC分类号： F16B39/32
CPC分类号： F16B39/32
摘要： A fastener assembly includes a fastener, a washer, and a ratchet plate. The washer includes a washer base, and at least one pawl extending from the washer base. The ratchet plate includes a ratchet base and a ratcheted outer profile extending in a circumferential direction around a circumferential periphery of the ratchet base. The ratchet plate is carried by a head of the fastener, and the ratcheted outer profile cooperates with the pawl of the washer.

6. 发明授权

US09702697B2 Bias and scale-factor error mitigation in a Coriolis vibratory gyroscope system 有权
公开(公告)号：US09702697B2
公开(公告)日：2017-07-11
申请号：US14618726
申请日：2015-02-10
申请人： Robert E. Stewart , David M. Rozelle , Charles A. Lee
发明人： Robert E. Stewart , David M. Rozelle , Charles A. Lee
IPC分类号： G01C19/56 , G01C19/5677 , G01C25/00 , G01C19/5684 , G01C19/5691 , G01C19/5776
CPC分类号： G01C19/5677 , G01C19/5684 , G01C19/5691 , G01C19/5776 , G01C25/00
摘要： One embodiment of the invention includes a CVG system. A plurality of electrodes electrostatically force a resonator into a periodic motion based on a drive axis forcer signal applied to a first set of the plurality of electrodes and a sense axis force-rebalance signal applied to a second set of the plurality of electrodes, and provides a sense axis pickoff signal and a drive axis pickoff signal. A gyroscope controller generates the drive axis forcer signal based on the drive axis pickoff signal and calculates an angular rate of rotation about an input axis based on the sense axis force-rebalance signal. The gyroscope controller modulates a predetermined disturbance signal component onto the sense axis force-rebalance signal and to control a modulation phase of the sense axis force-rebalance signal based on detection of the predetermined disturbance signal component in the sense axis force-rebalance signal to substantially mitigate bias and scale-factor error.

7. 发明授权

US09651399B2 Continuous calibration of an inertial system 有权
公开(公告)号：US09651399B2
公开(公告)日：2017-05-16
申请号：US14668465
申请日：2015-03-25
申请人： Robert E. Stewart , Charles A. Lee
发明人： Robert E. Stewart , Charles A. Lee
IPC分类号： G01P21/00 , G01C25/00
CPC分类号： G01C25/005 , G01P21/00
摘要： One embodiment of the invention includes an inertial system. The system includes at least one inertial sensor configured to measure an inertial parameter associated with each of at least one axis. The system also includes a calibration system configured to sequentially measure an inertial calibration parameter at each of a plurality input axes. The system further includes an inertial processor configured to calculate motion of the inertial system based on the inertial parameter associated with each of the respective at least one axis and the sequential measurements of the inertial calibration parameter at each of the plurality of input axes.

8. 发明申请

US20160282137A1 CONTINUOUS CALIBRATION OF AN INERTIAL SYSTEM 有权
标题翻译：连续系统的连续校准
公开(公告)号：US20160282137A1
公开(公告)日：2016-09-29
申请号：US14668465
申请日：2015-03-25
申请人： ROBERT E. STEWART , Charles A. Lee
发明人： ROBERT E. STEWART , Charles A. Lee
IPC分类号： G01C25/00 , G01P21/00
CPC分类号： G01C25/005 , G01P21/00
摘要： One embodiment of the invention includes an inertial system. The system includes at least one inertial sensor configured to measure an inertial parameter associated with each of at least one axis. The system also includes a calibration system configured to sequentially measure an inertial calibration parameter at each of a plurality input axes. The system further includes an inertial processor configured to calculate motion of the inertial system based on the inertial parameter associated with each of the respective at least one axis and the sequential measurements of the inertial calibration parameter at each of the plurality of input axes.
摘要翻译：本发明的一个实施例包括惯性系统。该系统包括配置成测量与至少一个轴中的每一个相关联的惯性参数的至少一个惯性传感器。该系统还包括被配置为在多个输入轴中的每一个处依次测量惯性校准参数的校准系统。该系统还包括惯性处理器，该惯性处理器被配置为基于与相应的至少一个轴中的每一个相关联的惯性参数以及在多个输入轴中的每一个处的惯性校准参数的顺序测量来计算惯性系统的运动。

9. 发明授权

US09341646B2 Bias reduction in force rebalanced accelerometers 有权
标题翻译：偏压减速力重新平衡加速度计
公开(公告)号：US09341646B2
公开(公告)日：2016-05-17
申请号：US13720231
申请日：2012-12-19
申请人： Robert E. Stewart
发明人： Robert E. Stewart
IPC分类号： G01P15/00 , G01P21/00 , G01P15/13 , G01P15/125
CPC分类号： G01P21/00 , G01P15/125 , G01P15/131
摘要： A system is provided for the continuous reduction, in real time, of bias in a force rebalanced accelerometers having a proof mass coupled to an accelerometer housing by a flexure suspension. The system comprises a closed loop, force rebalance servo that provides control voltage to the proof mass to null an electrical pickoff signal that indicates the motion of the proof mass with respect to the accelerometer housing, wherein a time varying disturbance signal is injected into the force rebalance servo that results in the generation of a time varying voltage in the output of the force rebalance servo that corresponds to a magnitude of the net positive spring of the combined flexure suspension and electrostatic springs acting on the proofmass. The system also comprises a negative electrostatic spring servo that applies a negative electrostatic spring DC voltage to each of a pair of negative electrostatic forcer electrodes.
摘要翻译：提供了一种系统，用于实时地持续地减少力重新平衡的加速度计中的偏置，其具有通过挠曲悬架耦合到加速度计壳体的校准质量。该系统包括一个闭环力，力平衡伺服系统，其向检测质量块提供控制电压，以将指示相对于加速度计壳体的检测质量块运动的电气检测信号置零，其中将时变干扰信号注入力导致在力重新平衡伺服的输出中产生对应于组合的挠曲悬架的净正弹簧的大小和作用在校样板上的静电弹簧的时变电压的重新平衡伺服。该系统还包括负静电弹簧伺服器，其对一对负静电锻造电极中的每一个施加负静电弹簧直流电压。

10. 发明申请

US20160084291A1 Pawl-and-Ratchet Lockable Threaded Fastener Assembly 有权
标题翻译：爪和棘轮锁紧螺纹紧固件组件
公开(公告)号：US20160084291A1
公开(公告)日：2016-03-24
申请号：US14861002
申请日：2015-09-22
申请人： Robert E. Stewart , Nicholas Strumbos
发明人： Robert E. Stewart
IPC分类号： F16B39/32
CPC分类号： F16B39/32
摘要： A fastener assembly includes a fastener, a washer, and a ratchet plate. The washer includes a washer base, and at least one pawl extending from the washer base. The ratchet plate includes a ratchet base and a ratcheted outer profile extending in a circumferential direction around a circumferential periphery of the ratchet base. The ratchet plate is carried by a head of the fastener, and the ratcheted outer profile cooperates with the pawl of the washer.
摘要翻译：紧固件组件包括紧固件，垫圈和棘轮板。垫圈包括垫圈基座和从垫圈基部延伸的至少一个棘爪。棘轮板包括棘轮基座和棘轮底座周围周向延伸的棘轮外轮廓。棘轮板由紧固件的头部承载，并且棘轮外轮廓与垫圈的棘爪配合。

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