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公开(公告)号：US07319438B2
公开(公告)日：2008-01-15
申请号：US10991066
申请日：2004-11-17
IPC分类号： G09G5/00 , G06F3/038 , G08G5/04 , G01C21/00 , G01C9/00 , G01C17/00 , G01C19/00 , H04N7/18 , A61M21/00
摘要： In an exemplary display system adapted to display an image to an observer using a display where at least one of the display and observer is subjected to physical vibration referred to as jitter, accelerometers are mounted to elements subject to jitter and associated with the observer. A processing system uses acceleration measurements from the accelerometers to calculate an x-axis and y-axis jitter correction factors based on a comparison of the acceleration measurements, and generates a video output in which the visual information is displaced along the x-axis and y-axis based on the x-axis and y-axis jitter correction factors so that an image corresponding to the video output shown on the display appears to the observer as not having jitter.
摘要翻译： 在示例性显示系统中，适于使用显示器将观察者显示图像，其中显示器和观察者中的至少一个被称为抖动的物理振动，加速度计被安装到受到抖动并与观察者相关联的元件。 处理系统使用来自加速度计的加速度测量来基于加速度测量的比较来计算x轴和y轴抖动校正因子，并产生其中视觉信息沿x轴和y位移的视频输出 基于x轴和y轴抖动校正因子，使得与显示器上显示的视频输出相对应的图像对观察者显示为没有抖动。
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62.发明授权Automatic gain control of a closed loop fiber optic gyroscope using non-linear control laws 有权使用非线性控制规律对闭环光纤陀螺仪进行自动增益控制公开(公告)号：US06473182B1
公开(公告)日：2002-10-29
申请号：US09826763
申请日：2001-04-04
IPC分类号： G01C1972
CPC分类号： H03G3/3084
摘要： A closed loop gain circuit controls the gain of a variable gain amplifier and provides a stable AGC response irrespective of the actual gain level. The amplifier may be arranged to amplify electrical signals output from a fiber optic gyroscope. A perturbation injection circuit provides a perturbation signal ±d to a phase modulator connected to the fiber optic gyro. A perturbation compensation circuit applies perturbation compensation signals to signals output from the variable gain amplifier and produces a compensated signal by reducing the magnitude of the perturbation in the amplified signal output from the variable gain amplifier. A gain error circuit connected to the perturbation compensation circuit produces a gain error signal that indicates the magnitude of the perturbation signal remaining in the amplified signal after perturbation compensation. A feedback system provides a gain control signal to the variable gain amplifier to reduce the magnitude of the gain error signal.
摘要翻译： 闭环增益电路控制可变增益放大器的增益，并提供稳定的AGC响应，而不考虑实际的增益电平。 放大器可以被布置成放大从光纤陀螺仪输出的电信号。 扰动注入电路向连接到光纤陀螺仪的相位调制器提供扰动信号±d。 扰动补偿电路将扰动补偿信号应用于从可变增益放大器输出的信号，并通过减小从可变增益放大器输出的放大信号中的扰动幅度产生补偿信号。 连接到扰动补偿电路的增益误差电路产生增益误差信号，该增益误差信号指示在扰动补偿之后放大信号中剩余的扰动信号的幅度。 反馈系统向可变增益放大器提供增益控制信号以减小增益误差信号的幅度。
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公开(公告)号：US06445455B1
公开(公告)日：2002-09-03
申请号：US09580653
申请日：2000-05-23
申请人： John R. Hall , Daniel A. Tazartes
发明人： John R. Hall , Daniel A. Tazartes
IPC分类号： G01C1972
CPC分类号： G01C19/726
摘要： A phase and intensity modulated IFOG has a light source responsive to an intensity modulation signal for providing an intensity modulated light signal. A Sagnac interferometer has a fiber optic coil. The coil receives and circulates a clockwise and counter-clockwise beams. The Sagnac interferometer is responsive to an intensity modulated light signal at a first input port, and to a phase modulation signal at a phase modulation input terminal for outputting a non-reciprocal interference signal. A PSD detector system responds to the non-reciprocal interference signal and provides a demodulated bias signal. An intensity signal generator has an output that provides the intensity modulation signal. A phase signal generator provides the phase modulation signal to the phase modulation input terminal. The intensity signal generator and the phase signal generator have a common frequency. The phase difference &thgr; between the phase modulation signal and the intensity modulation signal is adjustable in response to at least a first control signal. A computer with a digitizing sampler is coupled to receive and digitize successive sample values of the demodulated bias signal. The computer executes a program that adjusts the phase difference &thgr; between the intensity modulation signal and the phase modulation signal to drive the amplitude of the sample values of the demodulated bias signals to a minimum. The computer program successively calculates and outputs an estimate of the input rotation rate about the Sagnac sensitive axis as a function of the phase angle &thgr;.
摘要翻译： 相位和强度调制IFOG具有响应于强度调制信号的光源，用于提供强度调制光信号。 Sagnac干涉仪具有光纤线圈。 线圈接收并循环顺时针和逆时针。 Sagnac干涉仪响应于第一输入端口处的强度调制光信号，以及相位调制输入端的相位调制信号，用于输出不可逆干扰信号。 PSD检测器系统响应于不可逆干扰信号并提供解调偏置信号。 强度信号发生器具有提供亮度调制信号的输出。 相位信号发生器向相位调制输入端提供相位调制信号。 强度信号发生器和相位信号发生器具有共同的频率。 响应于至少第一控制信号，相位调制信号和强度调制信号之间的相位差可调。 具有数字化采样器的计算机被耦合以接收和数字化解调偏置信号的连续采样值。 计算机执行调节强度调制信号和相位调制信号之间的相位差θ的程序，以将解调的偏置信号的采样值的幅度驱动到最小。 计算机程序连续计算并输出关于Sagnac敏感轴的输入旋转速率的估计值作为相位角θ的函数。
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公开(公告)号：US5983718A
公开(公告)日：1999-11-16
申请号：US892252
申请日：1997-07-14
IPC分类号： G01C19/5705 , G01C19/5776 , G01P9/04
CPC分类号： G01C19/5705 , G01C19/5776
摘要： A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.
摘要翻译： 抖动的科里奥利加速度传感器系统具有通过在该频率下完全切断所有反馈转矩，以抖动频率在加速度计伺服回路中无反馈的证明质量。 因此，质量相对运动的质量是直接测量速率，因为没有反馈转矩来改变对加速度的质量响应。 根据本发明的反馈调制系统捕获科里奥利传感器输出，使得从传感器产生的信号的相位和增益在保持良好的比例因子方面是不必要的。
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公开(公告)号：US09429426B2
公开(公告)日：2016-08-30
申请号：US14161270
申请日：2014-01-22
CPC分类号： G01C19/721 , G01C19/00
摘要： A control system includes a processor that operates one or more control loops that enable gyroscopic angular measurement for an inertial measurement unit (IMU). Each of the one or more control loops operates over a range of set points defined for each of the respective control loops. A dynamic loop adjuster receives environmental input data to determine environmental conditions for the IMU. The dynamic loop adjuster alters at least one of the set points for at least one of the one or more control loops operated by the processor based on the determined environmental conditions.
摘要翻译： 一种控制系统包括一个操作一个或多个控制回路的处理器，该控制回路允许用于惯性测量单元（IMU）的陀螺仪角度测量。 一个或多个控制回路中的每个控制回路在为每个相应控制回路定义的设定点的范围内操作。 动态环路调节器接收环境输入数据，以确定IMU的环境条件。 动态环路调整器基于所确定的环境条件来改变由处理器操作的一个或多个控制回路中的至少一个的设定点中的至少一个。
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公开(公告)号：US07924427B2
公开(公告)日：2011-04-12
申请号：US11528133
申请日：2006-09-27
IPC分类号： G01C19/72
CPC分类号： G01C19/64
摘要： A gyroscope having photonic crystals for sensing rotation uses the Sagnac effect to determine angular motion. The gyroscope comprises a photonic crystal capable of guiding counter-propagating light beams in a closed path. A light source, coupling, and detection apparatus permits detection of phase changes between the counter-propagating beams, thereby permitting measurement of angular rotation. The photonic crystal comprises a periodic structure of pillars and voids which creates a photonic bandgap waveguide within which light waves in the proper wavelength range propagate with low loss.
摘要翻译： 具有用于感测旋转的光子晶体的陀螺仪使用Sagnac效应来确定角运动。 陀螺仪包括能够在闭合路径中引导反向传播的光束的光子晶体。 光源，耦合和检测装置允许检测反向传播光束之间的相位变化，从而允许角度旋转的测量。 光子晶体包括柱状和空隙的周期性结构，其产生光子带隙波导，其中适当波长范围内的光波以低损耗传播。
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67.发明授权公开(公告)号：US07859678B2
公开(公告)日：2010-12-28
申请号：US12316060
申请日：2008-12-09
IPC分类号： G01C19/72
CPC分类号： G01C19/726
摘要： An automatic gain control system for a fiber optic gyroscope control loop includes an adjustable gain applied to the gyro output signal. A pilot signal is injected into the fiber optic gyroscope control loop. A compensation loop receives signals output from the control loop and also receives pilot signals. The compensation loop processes the pilot signal to produce a compensation signal that is combined with signals output from the control loop to provide a compensated fiber optic gyroscope output signal. An automatic gain control loop is connected between the compensation loop and the adjustable gain applied to the fiber optic gyroscope output signal. The automatic gain control loop includes a gain error demodulator that multiplies the compensated fiber optic gyroscope output signal and the compensation signal together to produce a gain error signal used to control the adjustable gain in order to stabilize the gain of the gyro control loop.
摘要翻译： 用于光纤陀螺仪控制回路的自动增益控制系统包括施加到陀螺仪输出信号的可调增益。 导频信号被注入到光纤陀螺仪控制回路中。 补偿回路接收从控制回路输出的信号，并接收导频信号。 补偿环路处理导频信号以产生与从控制环路输出的信号组合的补偿信号，以提供经补偿的光纤陀螺仪输出信号。 自动增益控制回路连接在补偿回路和应用于光纤陀螺仪输出信号的可调增益之间。 自动增益控制回路包括增益误差解调器，该增益误差解调器将补偿的光纤陀螺仪输出信号和补偿信号相加在一起，以产生用于控制可调增益的增益误差信号，以稳定陀螺仪控制回路的增益。
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公开(公告)号：US07633626B2
公开(公告)日：2009-12-15
申请号：US11638768
申请日：2006-12-13
IPC分类号： G01C19/72
CPC分类号： G01C19/721
摘要： A fiber optic gyroscope signal process dither system permits application of a low amplitude dither signal for many sampling periods without increasing the noise in the sampled outputs due to residual dither signals. A dither loop and an accumulator are added to a closed loop fiber optic gyroscope rotation sensing system. The dither loop has a delay and a gain that are adjusted to match the gain and delay of the fiber gyro loop. A zero mean dither of amplitude sufficient to break up the deadband is injected into to gyro and the dither loop. The dither loop filters the dither signal in the same manner as the gyro loop to provide a signal that is input to a differencing circuit to remove the dither signal from the gyro output.
摘要翻译： 光纤陀螺仪信号处理抖动系统允许在许多采样周期下施加低幅度抖动信号，而不会由于残留抖动信号而增加采样输出中的噪声。 抖动环路和累加器被添加到闭环光纤陀螺仪旋转感测系统中。 抖动环具有延迟和增益，其被调整以匹配光纤陀螺回路的增益和延迟。 将足够破坏死区的振幅为零的平均抖动注入陀螺仪和抖动环路。 抖动环路以与陀螺回路相同的方式对抖动信号进行滤波，以提供输入到差分电路的信号，以从陀螺仪输出中去除抖动信号。
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公开(公告)号：US20080074673A1
公开(公告)日：2008-03-27
申请号：US11528133
申请日：2006-09-27
CPC分类号： G01C19/64
摘要： A gyroscope having photonic crystals for sensing rotation uses the Sagnac effect to determine angular motion. The gyroscope comprises a photonic crystal capable of guiding counter-propagating light beams in a closed path. A light source, coupling, and detection apparatus permits detection of phase changes between the counter-propagating beams, thereby permitting measurement of angular rotation. The photonic crystal comprises a periodic structure of pillars and voids which creates a photonic bandgap waveguide within which light waves in the proper wavelength range propagate with low loss.
摘要翻译： 具有用于感测旋转的光子晶体的陀螺仪使用Sagnac效应来确定角运动。 陀螺仪包括能够在闭合路径中引导反向传播的光束的光子晶体。 光源，耦合和检测装置允许检测反向传播光束之间的相位变化，从而允许角度旋转的测量。 光子晶体包括柱状和空隙的周期性结构，其产生光子带隙波导，其中适当波长范围内的光波以低损耗传播。
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70.发明授权公开(公告)号：US06268922B1
公开(公告)日：2001-07-31
申请号：US09208892
申请日：1998-12-10
IPC分类号： G01C1972
CPC分类号： G01C19/72
摘要： The invention is a method and apparatus for determining the fringe number for a fiber-optic gyro. The fiber-optic gyro comprises a light source feeding an interferometer which in turn feeds a detector. The detector output signal is a function of the fringe number and a plurality of controllable parameters. The method comprises the steps of (1) determining the values of the controllable parameters and (2) extracting the fringe number from the detector output signal utilizing the values of the controllable parameters.
摘要翻译： 本发明是用于确定光纤陀螺的边缘数的方法和装置。 光纤陀螺仪包括馈送干涉仪的光源，干涉仪又馈送检测器。 检测器输出信号是条纹数量和多个可控参数的函数。 该方法包括以下步骤：（1）确定可控参数的值，以及（2）利用可控参数的值从检测器输出信号中提取条纹数。
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