Dither-frequency-track method based on phase sensitive detector technology in mechanically dithered ring laser gyros

Lu, Guangfeng; Luo, Hui; Fan, Zhenfang

doi:10.1117/12.975771

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2020

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“…But the PZT has hysteresis and switching characteristics, and the sensitivity of PZT always changes with time. As the sensitivity of PZT changes with time, the feedback voltage from the transducer does not reflect the real dither status [6], [7].So, a new dither control system is developed using PID controller. PID controller [8] is used for controlling the dither frequency.…”

Section: Literature Surveymentioning

confidence: 99%

Implementation of Sensor Precision Mirror Rate using FPGA

K*,

Chinnaaiah,

et al. 2020

IJITEE

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The research contribution is increasing in the field of autonomous spacecraft. The major role contributes to the navigation methods for spacecraft. The intended control design is required precision mirror rate sensor (PMRS) to maintain positioning and stability of the satellite. One major drawback of the PMRS resides in the lock in effect, by which the sensor is not capable of sensing the rotation at low inertial angular rates. In the proposed work due to the uniqueness, it is able to sense the rotation even at the low inertial angular rates. The frequency control loop has been designed, it generates the resonance frequency using dither motor. The frequency control loop of the PMRS, is developed using a 32 bit MICROBLAZE soft core processor along with PID algorithm and same is executed using Xilinx Spartan 6 FPGA.

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Section: Literature Surveymentioning

confidence: 99%