公开(公告)号：US5208653A

公开(公告)日：1993-05-04

申请号：US741291

申请日：1991-08-06

申请人： John G. Mark ,  Daniel A. Tazartes ,  Tae W. Hahn

发明人： John G. Mark ,  Daniel A. Tazartes ,  Tae W. Hahn

IPC分类号： G01C19/66 ,  H01S3/139

CPC分类号： H01S3/139 ,  G01C19/665

摘要： Disclosed herein is a Digitally Controlled Cavity Length Control System comprising, in a preferred embodiment, an adaptive servo-loop for cavity length, modulation depth and amplitude control, and of the multioscillator ring laser gyroscope; thereby, permitting the simultaneous control of these elements. The cavity length control of the multioscillator, by including a variable RF detector gain, allows the operation of the gyroscope in a slightly detuned fashion to minimize magnetic sensitivity. In this manner, the multioscillator gyroscope may be maintained at a stable operating point suitable for modeling.

摘要翻译： 本文公开了一种数字控制腔长度控制系统，在优选实施例中，包括用于腔长度，调制深度和幅度控制的自适应伺服回路以及多振荡器环形激光陀螺仪; 从而允许同时控制这些元件。 通过包括可变RF检测器增益，多谐振荡器的腔长度控制允许陀螺仪以稍微失谐的方式操作以最小化磁敏感度。 以这种方式，多谐振荡器陀螺仪可以保持在适于建模的稳定工作点。

公开(公告)号：US5189487A

公开(公告)日：1993-02-23

申请号：US796567

申请日：1991-11-21

申请人： John G. Mark ,  Daniel A. Tazartes ,  Tae W. Hahn

发明人： John G. Mark ,  Daniel A. Tazartes ,  Tae W. Hahn

IPC分类号： G01C19/66

CPC分类号： G01C19/667

摘要： A rotational sensing system for a Multioscillator ring laser gyroscope is disclosed herein that can operate with a simple upright symmetric optics mechanism, where the required signal separation is performed fully electronically, with the use of a local oscillator. The technique allows for rotational rate and direction detection, as well as cavity length control, with a minimum of cross-talk.

摘要翻译： 本文公开了一种用于多振荡器环形激光陀螺仪的旋转感测系统，其可以使用简单的直立对称光学机构来操作，其中使用本地振荡器完全电子地执行所需的信号分离。 该技术允许旋转速率和方向检测以及腔长度控制，具有最小的串扰。

公开(公告)号：US5751425A

公开(公告)日：1998-05-12

申请号：US777498

申请日：1996-12-30

申请人： Donald A. Frederick ,  John G. Mark ,  Daniel A. Tazartes ,  David B. Hall ,  Tae W. Hahn

发明人： Donald A. Frederick ,  John G. Mark ,  Daniel A. Tazartes ,  David B. Hall ,  Tae W. Hahn

IPC分类号： G01C19/66 ,  G01C19/64

CPC分类号： G01C19/66

摘要： A ring laser gyroscope having an alternating Faraday bias includes mode combining apparatus arranged to cause interference between the modes that propagate within the cavity. Signal separating apparatus separates a signal indicative of rotation of the frame from other components of the combined intensity signal. The signal separating apparatus produces two signals indicative of the light intensity in the interference pattern of the combined modes. These two signals have a 180.degree. phase difference in corresponding components that are dependent upon the geometric bias caused by the non-planar optical path to produce a rotation signal that is independent of the spatially uniform interference fringes caused by the geometric bias.

摘要翻译： 具有交替法拉第偏置的环形激光陀螺仪包括布置成在腔内传播的模式之间产生干涉的模式组合装置。 信号分离装置将表示帧的旋转的信号与组合强度信号的其他分量分离。 信号分离装置产生指示组合模式的干涉图案中的光强度的两个信号。 这两个信号在对应的分量中具有180°的相位差，其取决于由非平面光路引起的几何偏置，以产生独立于由几何偏差引起的空间均匀干涉条纹的旋转信号。

公开(公告)号：US5374990A

公开(公告)日：1994-12-20

申请号：US45905

申请日：1993-04-12

申请人： Tae W. Hahn ,  Daniel A. Tazartes ,  John G. Mark

发明人： Tae W. Hahn ,  Daniel A. Tazartes ,  John G. Mark

IPC分类号： G01C19/66 ,  H01S3/139 ,  G01C19/64

CPC分类号： G01C19/665 ,  H01S3/139

摘要： Dispersion in a multi-oscillator cavity is equalized by processing information extracted from the laser beams within the cavity to generate an error signal representative of dispersion bias, and applying a bias control signal to the cavity in such a way as to null the error signal. The bias control signal is preferably a magnetic field applied to the gain medium of the cavity by passing a corresponding current through a coil surrounding the medium. In exemplary embodiments, the laser beams are modulated by modulating the applied magnetic field and/or the path length of the cavity.

摘要翻译： 通过处理从空腔内的激光束提取的信息来产生表示色散偏差的误差信号并将偏置控制信号以使得误差信号无效的方式施加到空腔中来均衡多谐振腔中的色散。 偏置控制信号优选地是通过使相应的电流通过围绕介质的线圈施加到空腔的增益介质的磁场。 在示例性实施例中，通过调制施加的磁场和/或腔的路径长度来调制激光束。

公开(公告)号：US6115125A

公开(公告)日：2000-09-05

申请号：US255391

申请日：1999-02-22

申请人： Daniel A. Tazartes ,  John G. Mark ,  David I. Tazartes

发明人： Daniel A. Tazartes ,  John G. Mark ,  David I. Tazartes

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： The invention is a method and apparatus for determining the rotation of a medium through which a light beam propagates by modulating the light beam with a primary pseudorandom bit sequence consisting of a plurality of contiguous P subsequences. Each P subsequence consists of a start sequence of predetermined length followed by a sequence of trailing bits. The method comprises three steps. The first step consists of deriving a feedback bit from each generating sequence in a P subsequence in accordance with a specified rule where a generating sequence is any sequence of contiguous bits in the P subsequence having the same length as the start sequence. The bit that follows a generating sequence is called the trailing bit for that generating sequence. The second step of the method consists of determining a sequence of one or more modifier bits to be used in modifying the P subsequence. The third step of the method consists of modifying the P subsequence utilizing the one or more modifier bits.

摘要翻译： 本发明是用于通过用由多个邻接P子序列组成的主伪随机比特序列调制光束来确定光束通过其传播介质的旋转的方法和装置。 每个P子序列包括预定长度的开始序列，随后是后续位序列。 该方法包括三个步骤。 第一步包括根据指定规则从P子序列中的每个生成序列导出反馈比特，其中生成序列是具有与起始序列相同长度的P子序列中的连续比特的任何序列。 跟随生成序列的位称为该生成序列的尾随位。 该方法的第二步是确定用于修改P子序列的一个或多个修饰符比特的序列。 该方法的第三步包括利用一个或多个修饰词比特来修改P子序列。

公开(公告)号：US5883716A

公开(公告)日：1999-03-16

申请号：US893961

申请日：1997-07-15

申请人： John G. Mark ,  Daniel A. Tazartes

发明人： John G. Mark ,  Daniel A. Tazartes

IPC分类号： G01C19/72

CPC分类号： G01C19/726

摘要： A closed-loop system for regulating a fiber optic gyroscope is configured so that the residual error of a so-called deadbeat system assumes a higher order function of frequency. The closed-loop gyro includes a rate controller within the feedback path. The rate controller receives the gyro output from the last loop transit corrected for d.c. offset and for nominal dither and outputs a gyro rate estimate. The rate controller includes a plurality of feedback integrators in cascaded relationship. In this way, the residual gyro error associated with inherent loop delay is elevated to a higher-order relationship to sensed gyro rate. As a result, a substantial reduction in residual error as a function of sensed gyro rate occurs throughout the range of operational gyro frequencies.

摘要翻译： 配置用于调节光纤陀螺仪的闭环系统被配置为使得所谓的失谐系统的残余误差假定频率的高阶函数。 闭环陀螺仪包括反馈路径内的速率控制器。 速率控制器接收从最后循环传输的陀螺仪输出。 偏移和用于标称抖动，并输出陀螺仪速率估计。 速率控制器包括多个级联关系的反馈积分器。 以这种方式，与固有环路延迟相关的残余陀螺仪误差升高到与感测陀螺仪速率的高阶关系。 结果，作为感测陀螺仪的函数的残余误差的显着减少发生在操作陀螺仪频率的整个范围内。

公开(公告)号：US5604308A

公开(公告)日：1997-02-18

申请号：US589578

申请日：1996-01-22

申请人： John G. Mark ,  Daniel P. McLane ,  Daniel A. Tazartes ,  Stanley F. Wyse

发明人： John G. Mark ,  Daniel P. McLane ,  Daniel A. Tazartes ,  Stanley F. Wyse

IPC分类号： G01P15/00 ,  G01P15/13

CPC分类号： G01P15/13

摘要： A digital circuit for adapting the output of a closed-loop accelerometer to a utilization circuit where the cycle time of the rebalance loop of the accelerometer is unrelated to the cycle time of the utilization circuit. A register receives and stores a digital value representative of measured acceleration and a bank of serially-arranged divide-by-two counters accepts the output of the rebalance loop clock. A gate arrangement makes one-by-one correlations between the states of the register and the outputs of the divide-by-two counters. A trigger circuit receives the gate outputs, providing a pulse when triggered by a downgoing edge of a square wave output of the gate array. A counter receives the pulse stream and is gated, in turn, in accordance with the cycle time of the utilization circuit so that the accelerometer data employed therein is representative of the portion of the acceleration occurring during a cycle of the utilization circuit.

摘要翻译： 一种用于将闭环加速度计的输出适配到利用电路的数字电路，其中加速度计的重新平衡环路的周期时间与利用电路的周期时间无关。 寄存器接收并存储表示测量加速度的数字值，并且串行排列的二位计数器的存储体接受重新平衡环路时钟的输出。 门阵列在寄存器的状态和分频计数器的输出之间形成一个一个的相关性。 触发电路接收栅极输出，当由栅极阵列的方波输出的下降沿触发时提供脉冲。 计数器接收脉冲流，并且根据利用电路的周期时间进行选通，使得其中使用的加速度计数据代表在利用电路的周期期间发生的加速度的部分。

公开(公告)号：US5570304A

公开(公告)日：1996-10-29

申请号：US281348

申请日：1994-07-27

申请人： John G. Mark ,  Daniel A. Tazartes

发明人： John G. Mark ,  Daniel A. Tazartes

IPC分类号： G01C21/16 ,  G01C19/34

CPC分类号： G01C21/16 ,  Y10S388/902

摘要： A method for thermal modeling and updating of bias errors in inertial navigation instrument outputs relies upon piecewise cubic spline encoding of data. The temperature range of the thermal model is divided into contiguous intervals of equal length. Instrument bias-versus-temperature data is encoded on an interval-by-interval basis with all intervals normalized so that cubic polynomials of identical form may be fitted between boundary intervals defined by function values and slopes. Instrument bias error at a measured temperature is estimated in the field and an update point (bias, temperature) established. The particular interval is located and the thermal model is re-fit accordingly in the region of the relevant interval. The spline parameters are then adjusted to accommodate the estimated bias error thereby updating the instrument thermal model of bias.

摘要翻译： 惯性导航仪输出偏置误差的热建模和更新方法依赖于数据的分段三次样条编码。 热模型的温度范围分为相等长度的连续间隔。 仪器偏置温度数据以逐个间隔为基础进行编码，所有间隔都被归一化，使得相同形式的三次多项式可以在由功能值和斜率定义的边界间隔之间拟合。 在测量温度下的仪器偏置误差在现场进行估计，并建立更新点（偏置温度）。 定位特定的间隔，并且在相关间隔的区域内相应地重新拟合热模型。 然后调整样条参数以适应估计的偏差误差，从而更新仪器热偏置模型。

公开(公告)号：US5521555A

公开(公告)日：1996-05-28

申请号：US279509

申请日：1994-07-25

申请人： Daniel A. Tazartes ,  John E. Higbee ,  Jacque A. Tazartes ,  Juergen K. P. Flamm ,  John G. Mark

发明人： Daniel A. Tazartes ,  John E. Higbee ,  Jacque A. Tazartes ,  Juergen K. P. Flamm ,  John G. Mark

IPC分类号： G01C19/72 ,  G01J1/44 ,  H03F3/08

CPC分类号： G01J1/44 ,  G01C19/721 ,  H03F3/082

摘要： An amplifier topology for receiving signals output from a fiber optic rotation sensor and producing voltages that may be processed to determine the rotation rate includes a photodiode for receiving an optical signal and producing a corresponding electrical photodiode output signal. An ultra low noise and ultra low capacitance differential input stage is connected to receive the photodiode output signal. An operational amplifier having low noise and ultra-wide bandwidth is connected to the ultra low capacitance differential input stage to receive the output signal therefrom as a driving signal and to produce a low noise output signal. The differential input stage comprises a first amplifier circuit that includes a first transistor connected to the photodetector to act as a first buffer having low noise, low capacitance and unity gain. The first amplifier circuit also includes a second transistor configured as a first voltage follower connected between the output of the first buffer and the operational amplifier to isolate the output of the first buffer from parasitic capacitive loading from a biasing network. The differential input stage further comprises a second a second amplifier circuit that includes a third transistor having an input connected to a reference potential, the third transistor acting as a second buffer having low noise, low capacitance and unity gain. The second amplifier circuit also includes a fourth transistor configured as a second voltage follower connected between the output of the second buffer and the operational amplifier.

摘要翻译： 用于接收从光纤旋转传感器输出的信号并产生可被处理以确定旋转速率的电压的放大器拓扑包括用于接收光学信号并产生相应的光电二极管输出信号的光电二极管。 连接超低噪声和超低电容差分输入级，以接收光电二极管的输出信号。 具有低噪声和超宽带宽的运算放大器连接到超低电容差分输入级，以将其输出信号作为驱动信号接收并产生低噪声输出信号。 差分输入级包括第一放大器电路，其包括连接到光电检测器的第一晶体管，以充当具有低噪声，低电容和单位增益的第一缓冲器。 第一放大器电路还包括被配置为连接在第一缓冲器的输出端和运算放大器之间的第一电压跟随器的第二晶体管，以将第一缓冲器的输出与偏置网络的寄生电容负载隔离开来。 差分输入级还包括第二个第二放大器电路，其包括具有连接到参考电位的输入的第三晶体管，第三晶体管用作具有低噪声，低电容和单位增益的第二缓冲器。 第二放大器电路还包括被配置为连接在第二缓冲器的输出端和运算放大器之间的第二电压跟随器的第四晶体管。

公开(公告)号：US5485273A

公开(公告)日：1996-01-16

申请号：US690174

申请日：1991-04-22

申请人： John G. Mark ,  Daniel A. Tazartes ,  Robert E. Ebner ,  Neal J. Dahlen ,  Nibir K. Datta

发明人： John G. Mark ,  Daniel A. Tazartes ,  Robert E. Ebner ,  Neal J. Dahlen ,  Nibir K. Datta

IPC分类号： G01C19/66 ,  H01S3/083 ,  H03H15/00 ,  H03H17/00 ,  G01B9/02

CPC分类号： G01C19/66

摘要： Disclosed herein is a Ring Laser Gyroscope Enhanced Resolution System comprising, in a preferred embodiment, a sampling frequency modulation phase-locked loop (or "chirp") which is used in combination with the fast filter. Enhanced resolution is achieved by using the fast filter (preferably a moving average digital filter) to gather optically integrated rate data and accumulate this data. During the data gathering process, the accumulated data is sampled at a rate set by a frequency modulated ("chirper") phase-locked loop in order to remove undesirable data due to aliasing effects upon the digital filter. In this manner, an enhanced resolution of the gyroscope angular measurement is achieved.

摘要翻译： 本文公开了一种环形激光陀螺仪增强分辨率系统，其在优选实施例中包括与快速滤波器组合使用的采样频率调制锁相环（或“啁啾”）。 通过使用快速滤波器（优选移动平均数字滤波器）来收集光学积分的速率数据并累积该数据来实现增强的分辨率。 在数据采集过程中，以由频率调制（“啁啾”）锁相环设置的速率对累积数据进行采样，以便由于对数字滤波器的混叠效应而消除不期望的数据。 以这种方式，实现陀螺仪角度测量的增强分辨率。