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1.
公开(公告)号:US4783169A
公开(公告)日:1988-11-08
申请号:US764441
申请日:1985-08-09
CPC分类号: G01C19/70 , G01C19/665
摘要: A ring laser gyro having a cavity with at least one transducer-actuated mirror is controlled to conform to a preselected model of cavity operation. Control is accomplished by sampling cavity data, comparing the data to the model to generate an error signal, and controlling the mirror according to the error signal. In a preferred embodiment, at least two mirrors are dithered and the model defines an optimal amplitude of mirror dither at which theoretical lock-in error is zero. In another preferred embodiment, the sampled data corresponds to laser intensity within the cavity and the model defines an optimal intensity displaced from the maximum within an operating mode of the cavity. The model may define a plurality of operating modes of the cavity, ranked according to gyro performance for different values of a preselected environmental condition. The environmental condition is then sensed on an ongoing basis and used to select an optimal mode.
摘要翻译: 具有至少一个换能器致动反射镜的空腔的环形激光陀螺仪受到控制以符合预先选择的腔体操作模型。 通过对腔体数据进行采样,将数据与模型进行比较以产生误差信号,并根据误差信号控制反射镜来实现控制。 在优选实施例中,至少两个反射镜被抖动,并且模型定义了理论锁定误差为零的反射镜抖动的最佳幅度。 在另一优选实施例中,采样数据对应于空腔内的激光强度,并且模型限定了在空腔的操作模式内从最大值偏移的最佳强度。 模型可以定义腔的多个操作模式,根据陀螺仪性能对于预选环境条件的不同值进行排序。 然后,环境条件在持续的基础上被感测并用于选择最佳模式。