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104 条记录 (耗时 0.021 秒)

    Range-dependent bias calibration of an accelerometer sensor system
    7.
    发明公开
    Range-dependent bias calibration of an accelerometer sensor system 有权
    BereichsabhängigeKalibrierung systematischer Fehler eines Sensorsystems eines Beschleunigungsmessers

    公开(公告)号：EP2770331A1

    公开(公告)日：2014-08-27

    申请号：EP14152754.9

    申请日：2014-01-28

    申请人： Northrop Grumman Guidance and Electronics Company, Inc.

    发明人： Bulatowicz, Michael D.

    IPC分类号： G01P15/125 ,  G01P15/13 ,  G01P21/00

    CPC分类号： G01P21/00 ,  G01P15/125 ,  G01P15/131 ,  G01P2015/0828 ,  G06F17/10

    摘要： One embodiment of the invention includes an accelerometer sensor system. The system includes a sensor comprising a proofmass and electrodes and being configured to generate acceleration feedback signals based on control signals applied to the electrodes in response to an input acceleration. The system also includes an acceleration component configured to measure the input acceleration based on the acceleration feedback signals. The system further includes an acceleration controller configured to generate the control signals to define a first scale-factor range associated with the sensor and to define a second scale-factor range associated with the sensor. The control system includes a calibration component configured to calibrate the accelerometer sensor system with respect to range-dependent bias error based on a difference between the measured input acceleration at each of the first scale-factor range and the second scale-factor range.

    摘要翻译： 本发明的一个实施例包括加速度传感器系统。 该系统包括传感器，其包括校样和电极，并且被配置为基于响应于输入加速度施加到电极的控制信号产生加速度反馈信号。 该系统还包括加速度分量，其被配置为基于加速度反馈信号来测量输入加速度。 该系统还包括加速度控制器，其被配置为产生控制信号以限定与传感器相关联的第一比例因子范围并且定义与传感器相关联的第二比例因子范围。 控制系统包括校准组件，其被配置为基于在第一比例因子范围和第二比例因子范围中的每个测量的输入加速度之间的差异来相对于与范围相关的偏差误差校准加速度计传感器系统。

    Systems and method to mitigate AC stark shift effects in a sensor system
    8.
    发明公开
    Systems and method to mitigate AC stark shift effects in a sensor system 有权
    欧洲传感系统系统与Verfahren zur Reduzierung von AC-Stark-Effekten

    公开(公告)号：EP2749895A1

    公开(公告)日：2014-07-02

    申请号：EP13197071.7

    申请日：2013-12-13

    申请人： Northrop Grumman Guidance and Electronics Company, Inc.

    发明人： Walker, Thad G. ,  Bulatowicz, Michael D. ,  Larsen, Michael S. ,  Griffith, Robert C. ,  Clark, Philip R

    IPC分类号： G01R33/26 ,  G01C19/62

    CPC分类号： G01R33/26 ,  G01C19/62

    摘要： Sensor system (10) including a cell system comprising a pump laser (112) configured to generate a pump beam to polarize alkali metal particles (108) enclosed within a sensor cell. The system also includes a detection system (126) comprising a probe laser (128) configured to generate a probe beam. The detection system can also be configured to calculate at least one measurable parameter based on characteristics of the probe beam passing through the sensor cell resulting from precession of the polarized alkali metal particles in response to an applied magnetic field. The system further includes an AC Stark shift control system (104) configured to frequency-modulate the pump beam and to control a center frequency of a frequency-modulated pump beam based on the characteristics of the probe beam passing through the sensor cell to substantially stabilize and mitigate the effects of AC Stark shift on the at least one measurable parameter.

    摘要翻译： 传感器系统（10）包括电池系统，该电池系统包括泵激光器（112），该激光器被配置为产生泵浦光束以使包围在传感器电池内的碱金属颗粒（108）极化。 该系统还包括检测系统（126），其包括配置成产生探测光束的探测激光器（128）。 检测系统还可以被配置为基于由施加的磁场响应于偏振的碱金属颗粒的进动而导致通过传感器单元的探针光束的特性来计算至少一个可测量的参数。 该系统还包括AC Stark变速控制系统（104），其被配置为基于通过传感器单元的探测光束的特性对泵浦光束进行频率调制并控制调频泵浦光束的中心频率以基本上稳定 并减轻AC Stark移位对至少一个可测量参数的影响。

    Bias reduction in force rebalanced accelerometers
    9.
    发明公开
    Bias reduction in force rebalanced accelerometers 审中-公开
    强制偏置重新平衡加速度计

    公开(公告)号：EP2746780A1

    公开(公告)日：2014-06-25

    申请号：EP13196986.7

    申请日：2013-12-12

    申请人： Northrop Grumman Guidance and Electronics Company, Inc.

    发明人： Stewart, Robert E.

    IPC分类号： G01P15/125 ,  G01P15/13 ,  G01P21/00

    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 proofmass coupled to an accelerometer housing by a flexure suspension. The system comprises a closed loop, force rebalance servo that provides control voltage to the proofmass to null an electrical pickoff signal that indicates the motion of the proofmass 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，用于实时连续减少具有通过挠性悬架连接到加速度计壳体的检验质量的力平衡加速度计中的偏差。 该系统包括闭环回路力重新平衡伺服机构，其向检验质量提供控制电压以使指示检验质量相对于加速度计外壳的运动的电检测信号为零，其中时变干扰信号被注入力重新平衡伺服机构 这导致在力重新平衡伺服机构的输出中产生随时间变化的电压，该时间变化电压对应于组合的挠曲悬架的净正弹簧和作用在检验质量上的静电弹簧的大小。 该系统还包括负静电弹簧伺服系统，其将负静电弹簧直流电压施加到一对负静电驱动电极中的每一个。