Dither signal remover for a dithered ring laser angular rate sen

Details Dither signal remover for a dithered ring laser angular rate sen Dither signal remover for a dithered ring laser angular rate sen

1988-12-05

1994-07-19

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1968

Patent

active

053314026

ABSTRACT:
Disclosed is an apparatus for removing the dither signal component from a dithered ring laser gyro output. Corresponding numerical representations of the gyro readout signal, a dither reference signal representative of the dithering of the sensor, and a corrective sensor output are stored for a plurality of discrete sample times. The gyro readout signal is modified by a dither correction signal to provide the corrected sensor output signal. The dither correction signal derived from the current dither reference signal and one or more pass values thereof which are signal processed by an adaptive filter having varying filter weights. The filter weights are updated after each sample time, and are updated in accordance with a preselected function of past values of the dither reference signal in order to minimize any dither signal component in the corrected sensor output signal.

REFERENCES:
patent: 3373650 (1968-03-01), Killpatrick
patent: 3627425 (1971-12-01), Doyle et al.
patent: 4248534 (1981-02-01), Elbert
patent: 4344706 (1982-08-01), Ljung et al.
patent: 4610543 (1986-09-01), Ferriss
patent: 4790658 (1988-12-01), Sewell
"Adaptive Filter Theory", by Simon Haykin, McMaster University, 1986, pp. 194-244.

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