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1. 发明授权

US06640189B2 Method of improving satellite reacquisition performance for integrated GP/IG navigational systems 有权
标题翻译：综合GP / IG导航系统改善卫星重新获取性能的方法
公开(公告)号：US06640189B2
公开(公告)日：2003-10-28
申请号：US09955609
申请日：2001-09-19
申请人： Michael S. Perlmutter , Ian Humphrey
发明人： Michael S. Perlmutter , Ian Humphrey
IPC分类号： G01C2100
CPC分类号： G01S19/26 , G01C21/165 , G01S19/49
摘要： A method of reacquiring a satellite signal within an integrated GP/IG navigation system includes detecting a loss of synchronization between a timing code in the satellite signal and a corresponding reference timing code. The method includes receiving position data from an inertial guidance unit. The position data is representative of an estimated position (and its associated uncertainty) of the navigation system. The method also includes estimating a distance from the navigation system to the satellite, as a function of the position data, and deriving an initial delay from the distance. The method includes delaying the reference timing code, with respect to the timing code embedded in the satellite signal, by an offset delay substantially equal to the initial delay. The method includes incrementally varying the offset delay until the timing code embedded in the satellite signal is synchronized with the reference timing code, or until the offset delay equals a predetermined end limit value.
摘要翻译：在集成GP / IG导航系统内重新获取卫星信号的方法包括检测卫星信号中的定时码与对应的参考定时码之间的同步丢失。该方法包括从惯性引导单元接收位置数据。位置数据代表导航系统的估计位置（及其相关联的不确定性）。该方法还包括根据位置数据估计从导航系统到卫星的距离，以及从该距离导出初始延迟。该方法包括相对于嵌入在卫星信号中的定时码延迟参考定时码与基本上等于初始延迟的偏移延迟。该方法包括逐渐改变偏移延迟，直到嵌入在卫星信号中的定时代码与参考定时码同步，或者直到偏移延迟等于预定的限制值。

2. 发明授权

US06622091B2 Method and system for calibrating an IG/GP navigational system 有权
公开(公告)号：US06622091B2
公开(公告)日：2003-09-16
申请号：US09965746
申请日：2001-09-28
申请人： Michael S. Perlmutter , Ian Humphrey
发明人： Michael S. Perlmutter , Ian Humphrey
IPC分类号： G01C2126
CPC分类号： G01C21/165
摘要： A method of calibrating acceleration data signals from a set of accelerometers, and angular rate data signals from a set of gyroscopes within a combined GPS/IGS includes generating navigation data as a function of the acceleration data signals, the angular rate data signals, and prior navigation data. The method further includes combining the navigation data with GPS data via a Kalman filter, so as to produce corrected navigation data, navigation correction data, acceleration correction data and angular rate correction data. The method further includes modifying the acceleration data signals as a function of the acceleration correction data so as to calibrate the acceleration data signals, and modifying the angular rate data signals as a function of the angular rate correction data, so as to calibrate the angular data signals.

3. 发明授权

US5166949A Method and apparatus for suppressing off-axis modes in laser and ring laser gyroscopes 失效
标题翻译：用于抑制激光和环激光伽马射线偏轴模式的方法和装置
公开(公告)号：US5166949A
公开(公告)日：1992-11-24
申请号：US631592
申请日：1990-12-20
申请人： Michael S. Perlmutter
发明人： Michael S. Perlmutter
IPC分类号： G01C19/66 , H01S3/034 , H01S3/083
CPC分类号： H01S3/083 , G01C19/665 , H01S3/034
摘要： A dielectric interference film having a central region of one thickness and a peripheral region of a different thickness is superimposed on one of the mirrors of a ring laser gyroscope for the purpose of suppressing off-axis resonant modes that are characteristic of a resonant cavity. The central region is designed to intercept a large portion of the fundamental mode power and a lesser portion of the off-axis mode power. The difference in thickness between the central and peripheral regions causes the reflected light from the two regions to differ in phase by approximately one-half wavelength and destructively interfere. As a result of the imbalance of the fundamental and off-axis mode powers incident on the central region, the reflectivity losses of the off-axis modes are more pronounced than those of the fundamental mode with the result that the off-axis modes are completely suppressed.
摘要翻译：为了抑制作为谐振腔的特征的离轴共振模式，将具有一个厚度的中心区域和不同厚度的周边区域的电介质干涉膜叠加在环形激光陀螺仪的一个反射镜上。中心区域被设计成拦截基本模式功率的大部分和离轴模式功率的较小部分。中心区域和外围区域之间的厚度差导致来自两个区域的反射光的相位相差大约二分之一的波长并且相消干涉。由于入射到中心区域的基极和离轴模式功率的不平衡，离轴模式的反射率损耗比基模的反射率损失更明显，结果是离轴模式完全被压制

4. 发明授权

US4519708A Mode discrimination apparatus 失效
公开(公告)号：US4519708A
公开(公告)日：1985-05-28
申请号：US265712
申请日：1981-05-20
申请人： Michael S. Perlmutter , Kenneth H. Braun
发明人： Michael S. Perlmutter , Kenneth H. Braun
IPC分类号： H01S3/083 , G01C19/64 , G01C19/66 , G01P3/36 , H01S3/08 , H01S3/098 , H01S3/05
CPC分类号： H01S3/08068 , G01C19/667
摘要： In an optical system such as a ring laser gyroscope cavity, oscillations occur in many transverse modes. The desired modes are allowed to exist by suppressing undesired modes utilizing a light stop apparatus. One light stop is made by treating a dielectric mirror with an electron beam causing a phase change to occur to the undesired reflected waves. An alternative light stop is made by depositing an absorptive material on a dielectric mirror for absorbing some of the energy of the undesired modes. Both light stop embodiments are adjustable with respect to a laser wave in a resonant cavity.

5. 发明授权

US5430755A Pressure-equalized self-compensating discharge configuration for triangular ring laser gyroscopes 失效
标题翻译：三角环激光陀螺仪的均压自补偿放电配置
公开(公告)号：US5430755A
公开(公告)日：1995-07-04
申请号：US705248
申请日：1991-05-24
申请人： Michael S. Perlmutter
发明人： Michael S. Perlmutter
IPC分类号： G01C19/66 , G01B9/02
CPC分类号： G01C19/661
摘要： A triangular ring laser gyroscope having a single anode, single cathode, and self-compensating discharge path which cancels gyro bias, bias drift, and noise. The discharge path extends from the anode through a cross channel in the center of the gyro block to the cathode. Counter-propagating laser beams traverse one segment of the discharge path in the direction of the Langmuir flow from anode to cathode, and another segment of the discharge path of equal length in a direction opposite to that flow. The Langmuir return flow from cathode to anode occurs along the walls of the gyro cavity, producing a more uniform gas flow velocity in the central region of the discharge path. Drag effects on the counter-propagating laser beams are equal but opposite, and the laser beams traverse a more uniform region of the Langmuir flow when thermally-induced changes in the gyro cause beam wandering. Gyro bias, bias drift, and noise are substantially cancelled.
摘要翻译：具有单个阳极，单个阴极和自补偿放电路径的三角形环形激光陀螺仪，其抵消陀螺仪偏置，偏置漂移和噪声。放电路径从阳极延伸通过陀螺仪块中心的交叉通道到阴极。反向传播的激光束沿着Langmuir流从阳极到阴极的方向穿过放电路径的一个部分，并且沿着与该流相反的方向具有相等长度的另一段放电路径。从阴极到阳极的Langmuir回流沿着陀螺腔的壁发生，在排放路径的中心区域产生更均匀的气体流速。在反向传播的激光束上的拖曳效应相等但相反，当陀螺仪的热诱导变化导致光束漂移时，激光束横越Langmuir流的更均匀的区域。陀螺偏置，偏置漂移和噪声基本上被取消。

6. 发明授权

US4627732A Mode discrimination apparatus 失效
标题翻译：模式识别装置
公开(公告)号：US4627732A
公开(公告)日：1986-12-09
申请号：US714402
申请日：1985-09-06
申请人： Kenneth H. Braun , Michael S. Perlmutter
发明人： Kenneth H. Braun , Michael S. Perlmutter
IPC分类号： G01C19/66 , G01P3/36 , G01C19/64 , H01S3/05
CPC分类号： G01C19/667 , G01P3/366
摘要： In an optical system such as a ring laser gyroscope cavity, oscillations occur in many transverse modes. The desired modes are allowed to exist by suppressing undesired modes utilizing a light stop apparatus. One light stop is made by treating a dielectric mirror with an electron beam causing a phase change to occur to the undesired reflected waves. An alternative light stop is made by depositing an absorptive material on a dielectric mirror for absorbing some of the energy of the undesired modes. Both light stop embodiments are adjustable with respect to a laser wave in a resonant cavity.
摘要翻译：在诸如环形激光陀螺仪腔的光学系统中，在许多横向模式中发生振荡。通过利用光停止装置抑制不期望的模式，允许存在所需的模式。通过用电子束处理电介质反射镜来产生一个光停止，导致不期望的反射波发生相变。通过在电介质镜上沉积吸收材料来吸收一些不期望的模式的能量来制造替代的光停止。两个光停止实施例相对于谐振腔中的激光波形是可调节的。

7. 发明授权

US4968136A Ring laser gyro and magnetic mirror therefor 失效
标题翻译：环形激光陀螺仪和磁性镜
公开(公告)号：US4968136A
公开(公告)日：1990-11-06
申请号：US239724
申请日：1988-09-02
申请人： Wah L. Lim , V. Warren Biricik , Samuel J. Holmes , Frank R. Nakatsukasa , Joseph M. Bresman , Harley A. Perkins , Michael S. Perlmutter , Henry T. Minden
发明人： Wah L. Lim , V. Warren Biricik , Samuel J. Holmes , Frank R. Nakatsukasa , Joseph M. Bresman , Harley A. Perkins , Michael S. Perlmutter , Henry T. Minden
IPC分类号： G01C19/66 , G02F1/09 , H01S3/083
CPC分类号： H01S3/083 , G01C19/661 , H01S3/0835
摘要： A laser gyroscope is formed as a sealed, unitary assembly of mirrors optically contacted to a monolithic gyro block without any means, such as Brewster windows, for isolating the laser plasma from any of the mirrors. The mirrors are fabricated with hard multilayer dielectric films which can withstand plasma exposure. A magnetic mirror utilizing the transverse Kerr effect to separate the frequencies of counter-propagating beams, and to avoid lock-in, includes a Ni-Fe alloy layer over which is directly deposited a thin iron or iron alloy layer to form a rotationally switchable Kerr effect combination. The magnetic field for switching is generated by an electric current developed in two pairs of orthogonally disposed wires embedded in the substrate immediately below the iron and Ni-Fe alloy layers. A specially designed multilayer dielectric stack is disposed on one of the mirrors, for example over the iron and Ni-Fe alloy layers on the magnetic mirror, and is configured to suppress S mode oscillation in order to limit the gyro to P mode operation.
摘要翻译：形成激光陀螺仪作为密封的单一组件的反射镜，其与诸如布鲁斯特（Brewster）窗口无任何方式光学接触单片陀螺仪块，用于将激光等离子体与任何反射镜隔离。反射镜由可以承受等离子体暴露的硬质多层介质膜制成。利用横向克尔效应来分离反向传播光束的频率并避免锁定的磁镜包括Ni-Fe合金层，在其上直接沉积薄铁或铁合金层以形成可旋转切换的克尔效果组合。用于切换的磁场由在正下方的铁和Ni-Fe合金层内嵌入基板中的两对垂直布置的电线产生的电流产生。特别设计的多层电介质叠层设置在一个反射镜上，例如在磁反射镜上的铁和Ni-Fe合金层上，并且被配置为抑制S模式振荡，以将陀螺仪限制为P模式操作。

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