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公开(公告)号：US20230251093A1
公开(公告)日：2023-08-10
申请号：US18091148
申请日：2022-12-29
Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
Inventor： Yusuke GOCHO , Naoki YAMAMOTO , Kazunori YOSHIOKA , Kenji ABE
CPC classification number: G01C19/70 , G01C19/662
Abstract: A ring laser gyroscope includes an optical block for generating laser beams that counter-propagate in a closed-loop type optical path, a dither mechanism for applying dither vibration for mitigating a lock-in phenomenon to the optical block, and a dither controller for controlling the dither vibration. The dither controller imparts randomness to the frequency of the angular velocity of the dither vibration.
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公开(公告)号：US07548318B2
公开(公告)日：2009-06-16
申请号：US11734983
申请日：2007-04-13
Applicant: Igor Leonidovich Tchertkov , Salisbury Edward Henry Aston , Richard John August , Randall Jaffe
Inventor： Igor Leonidovich Tchertkov , Salisbury Edward Henry Aston , Richard John August , Randall Jaffe
CPC classification number: G01C19/56
Abstract: Dithering mechanism and method for eliminating the effects of zero-rate bias in a rate sensor or gyroscope. Both continuously moving and indexing embodiments are disclosed. The mechanism includes a first part mounted in a fixed position centered about a dither axis perpendicular to the input axis of the gyroscope, a second part disposed coaxially of the first part and affixed to the sensing element of the gyroscope, and a plurality of piezoelectrically driven quartz flexure beams extending radially between the first and second parts for dithering the second part about the dither axis. In some embodiments, the dithering mechanism is formed separately from and affixed to the sensing element of the gyroscope, and in others it is formed integrally with the sensing element. In the indexing embodiments, radial arms and fixed stops limit movement of the mechanism between two fixed positions, and drive signals and holding potentials are applied alternately to dither the mechanism between the two positions and to hold it alternately in those positions during successive data acquisition periods.
Abstract translation: 用于消除速率传感器或陀螺仪中零速率偏置影响的抖动机制和方法。 公开了连续移动和分度实施例。 该机构包括安装在以垂直于陀螺仪的输入轴的抖动轴为中心的固定位置的第一部分，与第一部分同轴设置并固定到陀螺仪的感测元件的第二部分，以及多个压电驱动 石英挠曲梁在第一和第二部分之间径向延伸，用于使第二部分围绕抖动轴线抖动。 在一些实施例中，抖动机构与陀螺仪的感测元件分开形成并固定到陀螺仪的感测元件，而在另一些实施例中，其与传感元件整体形成。 在分度实施例中，径向臂和固定止动器限制机构在两个固定位置之间的移动，并且交替施加驱动信号和保持电位以对两个位置之间的机构进行抖动，并在连续数据采集周期期间将其交替保持在那些位置 。
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3.发明授权Triaxial laser gyrometer including an actuating mechanism in thermal contact with the cathode 失效三轴激光陀螺仪包括与阴极热接触的致动机构
公开(公告)号：US5940179A
公开(公告)日：1999-08-17
申请号：US10935
申请日：1998-01-22
Applicant: Yves Jaulain , Etienne Bonnaudet , Eric Loil , Jacques Cordonnier , Andre Boura
Inventor： Yves Jaulain , Etienne Bonnaudet , Eric Loil , Jacques Cordonnier , Andre Boura
IPC: G01C19/70
CPC classification number: G01C19/70
Abstract: In the disclosed laser gyrometer, the three resonant optical cavities of the block are connected to a cathode chamber by means of the three cathode capillary tubes and to a balancing chamber by means of three balancing capillary tubes. The axis of the cathode is identified with the axis of actuation. The block is actuated by means of an actuating ring in thermal contact with the cathode so as to provide for dissipation of the heat generated at the cathode. The invention makes it possible to solve the problems relating to wobble (or lack of dynamic balance) as well as thermal gradients.
Abstract translation: 在所公开的激光陀螺仪中，块的三个共振光学腔通过三个阴极毛细管连接到阴极室，并通过三个平衡毛细管连接到平衡室。 阴极的轴线由致动轴识别。 该块通过与阴极热接触的致动环来致动，以便提供在阴极处产生的热量的耗散。 本发明可以解决与摆动（或动态平衡不足）以及热梯度有关的问题。
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公开(公告)号：US5867270A
公开(公告)日：1999-02-02
申请号：US984918
申请日：1997-12-04
Applicant: Timothy A. Beckwith , William M. Brintz , Karl D. Johnson
Inventor： Timothy A. Beckwith , William M. Brintz , Karl D. Johnson
CPC classification number: G01C19/70
Abstract: Disclosed is a mounting mechanism and method for accurately securing and uniformly bonding piezoelectric transducers (PZT's) to a dither spring. The dither spring includes a central hub, an outer toroidal rim, a plurality of flexible reeds and a plurality of lobes. The reeds extend between the hub and the rim, and one of the lobes is positioned between each pair of adjacent reeds. A mounting mechanism includes locating channels on the lobes sized to receive mounting inserts that hold the PZT's during assembly. The mounting mechanism accurately positions and provides a uniform bonding force to the PZT's to precisely and firmly secure the PZT's on the dither spring reeds.
Abstract translation: 公开了一种用于将压电换能器（PZT）精确地固定并均匀地连接到抖动弹簧的安装机构和方法。 抖动弹簧包括中心毂，外环形边缘，多个柔性簧片和多个凸角。 簧片在轮毂和轮辋之间延伸，其中一个叶片位于每对相邻的芦苇之间。 一种安装机构包括在凸角上定位通道，其尺寸设计成接收在组装过程中保持PZT的安装插入件。 安装机构精确地定位并提供均匀的粘合力给PZT，以将PZT精确且牢固地固定在弹簧簧片上。
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公开(公告)号：US5012174A
公开(公告)日：1991-04-30
申请号：US209251
申请日：1988-06-20
Applicant: Charles M. Adkins , James R. Brazell , Gerard T. Mayer , Henry C. Stacey
Inventor： Charles M. Adkins , James R. Brazell , Gerard T. Mayer , Henry C. Stacey
CPC classification number: F16F7/1005 , G01C19/70 , F16F2224/0283
Abstract: A dynamic vibration absorber for reducing vibrations of a platform induced by an oscillating mass mounted thereon is provided by mounting a mass of equal mechanical resonant frequency as that of the oscillating mass and oscillating this mass in a manner to establish an equal and opposite vibration of the platform, thereby cancelling the vibrations induced by the oscillating mass. In one embodiment, a signal from the oscillating mass representative of the frequency and amplitude of its mechanical oscillation is phase shifted and utilized as a driving signal to the drive motor of the absorber mass. In another embodiment, electrical signals representative of the platform vibrations are detected to provide phase and amplitude vibration error signals. These error signals are applied to a reference signal coupled to the drive motor of the canceller mass causing the oscillations of the canceller mass to induce vibrations in the platform which counter the vibrations induced by the oscillating mass.
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Patent Agency Ranking
公开(公告)号：US4981359A
公开(公告)日：1991-01-01
申请号：US367957
申请日：1989-06-19
Applicant: Daniel A. Tazartes , John G. Mark , Robert E. Ebner
Inventor： Daniel A. Tazartes , John G. Mark , Robert E. Ebner
CPC classification number: G01C19/70
Abstract: A dither drive system for a ring laser gyroscope includes a computer, a digital to analog converter, a filter, and a power amplifier. The system senses the dither frequency of the gyro frame and produces a digital signal that corresponds to a specified dither drive signal and toggles the dither drive signal to drive the flexure at its resonant frequency. The dither drive system generates digital waveforms that approximate the sine function and digital waveforms that approximate the cosine function and applies the digital waveforms in quadrature to the flexure.
Abstract translation: 用于环形激光陀螺仪的抖动驱动系统包括计算机，数模转换器，滤波器和功率放大器。 该系统感测陀螺仪帧的抖动频率并产生对应于指定的抖动驱动信号的数字信号，并切换抖动驱动信号以在其谐振频率处驱动挠曲。 抖动驱动系统产生近似正弦函数的数字波形和近似余弦函数的数字波形，并将正交的数字波形应用于挠曲。
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公开(公告)号：US4846574A
公开(公告)日：1989-07-11
申请号：US507618
申请日：1983-06-24
Applicant: Robert W. Upton, Jr.
Inventor： Robert W. Upton, Jr.
Abstract: A ring laser is provided with at least one retroreflector external to the ring laser closed-loop path for redirecting energy extracted from one of the counterpropagating beams into the opposite traveling counterpropagating beam. The redirected energy is modulated so as to oppose the normal coupling between the counterpropagating beams which causes lock-in.
Abstract translation: 环形激光器设置有环形激光器闭环路径外部的至少一个后向反射器，用于将从一个反向传播光束提取的能量重定向到相对的行进反向传播光束。 重定向的能量被调制成与反向传播光束之间的正常耦合相反，导致锁定。
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8.发明授权Method and system for correcting random walk errors induced by rate reversals in a dithered ring laser gyroscope 失效用于校正抖动环形激光陀螺仪中由速率反转引起的随机游走错误的方法和系统
公开(公告)号：US4844615A
公开(公告)日：1989-07-04
申请号：US8827
申请日：1987-01-30
Applicant: Rodney W. Benoist
Inventor： Rodney W. Benoist
CPC classification number: G01C19/70 , G01C19/662
Abstract: A correction to the output angle of the ring laser gyroscope is calculated as a function of the phase difference and the magnitude of coupling between the two counterpropagating beams when the dither oscillations change direction. A pair of heterodyne detectors produce heterodyne signals indicative of the interference pattern between the counterpropagating beams. A signal indicative of the sum of the separate beam intensities is demodulated with the heterodyne signals to determine the magnitude of coupling between the beams in the ring laser gyroscope.
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公开(公告)号：US4702602A
公开(公告)日：1987-10-27
申请号：US890366
申请日：1986-07-29
Applicant: George S. Grant
Inventor： George S. Grant
CPC classification number: G01C19/70
Abstract: A dither mechanism comprises a hub (10) arranged to be fixed to a mounting, and a rim (11) coaxial with the hub and to which the ring laser may be attached. A number of radial spokes (12) interconnect the hub (10) and the rim (11), and each has its point of attachment to the rim (11) recessed into the rim in a radial direction. A pair of pegs (32) is associated with at least one spoke and is arranged for insertion into the recesses (15) between the rim and each side of the spoke (12) so as to vary the effective length of the spoke. Drive means (30) are provided for imparting an oscillatory rotational motion to the rim (11) relative to the hub (10) about the axis of the hub.
Abstract translation: 抖动机构包括布置成固定到安装件的轮毂（10）和与轮毂同轴的轮辋（11），环形激光器可以附接到该轮辋。 多个径向轮辐（12）将轮毂（10）和轮辋（11）相互连接，并且每个径向辐条（12）都具有与径向方向上凹入轮辋的轮辋（11）的连接点。 一对销钉（32）与至少一个辐条相关联，并且布置成插入在轮辐（12）的轮缘和每侧之间的凹部（15）中，以便改变辐条的有效长度。 驱动装置（30）被设置用于围绕轮毂的轴线相对于轮毂（10）向轮辋（11）施加振荡的旋转运动。
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公开(公告)号：US4653918A
公开(公告)日：1987-03-31
申请号：US496606
申请日：1983-05-20
Applicant: Daryl C. Stjern , Thomas M. Wirt
Inventor： Daryl C. Stjern , Thomas M. Wirt
CPC classification number: G01C19/70
Abstract: A low Q ring laser gyro-dither motor assembly which is responsive to a wide range of frequency components of a drive signal having a randomly varying frequency such that the dither imparted to the gyro is frequency modulated by the drive. The frequency modulated dither varies the lock-in rate of the gyro as a function of the random drive signal to eliminate errors in the gyro output due to lock-in. The drive signal may be random in frequency only or random in both frequency and amplitude to provide the frequency modulation. Fixed frequency modulation may also be employed. The low Q assembly need not be driven at the natural frequency thereof so that a common drive circuit may be employed for a plurality of low Q gyro-dither motor assemblies forming an instrument cluster.
Abstract translation: 低Q环激光陀螺电动机组件，其响应于具有随机变化的频率的驱动信号的宽范围的频率分量，使得赋予陀螺仪的抖动被驱动器调频。 频率调制抖动根据随机驱动信号改变陀螺仪的锁定速率，以消除由于锁定导致的陀螺输出中的错误。 驱动信号可以在频率上是随机的或在频率和幅度上都是随机的，以提供频率调制。 也可以采用固定频率调制。 低Q组件不需要以其固有频率驱动，从而可以为形成仪表组的多个低Q陀螺仪电动机组件采用公共的驱动电路。
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