Multiplexed fiberoptic gyro control

Details Multiplexed fiberoptic gyro control Multiplexed fiberoptic gyro control

1989-12-06

1991-07-23

Turner, Samuel

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

050338544

ABSTRACT:
Apparatus and methods are disclosed for the time division multiplexing of fiberoptic gyros to reduce the amount of control electronics required. Each of a plurality of gyros is sampled at a rate of n.tau., where .tau. is the gyro optical transit time and n is an integer. The sampled signal is fed to a digital signal processor (DSP) for processing and used to form a rate feedback signal. The rate feedback signal is converted to analog form to drive the phase modulator drive of each gyro. In preferred embodiments the multiplexed sample rate is at least ten times the bandwidth of the gyros. The rate data can be filtered and output by the DSP and the DSP can integrate the rate data to give angle data. The use of precision analog circuits is avoided.

REFERENCES:
patent: 4828389 (1989-05-01), Gubbins et al.

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