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Direct dither control without external feedback for ring laser gyro
- Source :
- Optics & Laser Technology. 44:767-770
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- To avoid the lock-in effect, a body dither is introduced for the ring laser gyro (RLG). A dither feedback signal is necessary to control the dither drive signal. In the current dither control method, a piezoelectric or electromagnetic transducer is often used to obtain the dither feedback. The read-out signal of the RLG contains all dither-related information; hence, dither feedback can be obtained from the read-out signal, and external feedback can be reduced. A novel dither controlling method without external feedback is introduced in the present paper. How to control the dither amplitude and track the resonant frequency of the dither motor is described in detail. A comparative experiment is conducted between the old dither control method and the new one. Results show that the output of RLG using the new method has the same accuracy as that using the old method, aside from having more compact circuit dimensions.
- Subjects :
- Computer science
business.industry
Control (management)
Signal
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Amplitude
Transducer
Control theory
Ring laser gyroscope
Dither
Electrical and Electronic Engineering
business
Control methods
Digital signal processing
Subjects
Details
- ISSN :
- 00303992
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Optics & Laser Technology
- Accession number :
- edsair.doi...........b06e97aa427bd5063fe1eb4b4d5c543a