Direct dither control without external feedback for ring laser gyro

Fan, Zhenfang; Luo, Hui; Lu, Guangfeng; Hu, Shaomin

doi:10.1016/j.optlastec.2011.11.032

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Direct dither control without external feedback was used in [ 28 ] in 2012 to avoid the lock-in effect for a ring laser gyro. A new design, that makes the system more compact and inexpensive, was proposed.…”

Section: Optical Gyroscopesmentioning

confidence: 99%

Gyroscope Technology and Applications: A Review in the Industrial Perspective

Passaro

Cuccovillo²,

Vaiani³

et al. 2017

Sensors

349

152

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This paper is an overview of current gyroscopes and their roles based on their applications. The considered gyroscopes include mechanical gyroscopes and optical gyroscopes at macro- and micro-scale. Particularly, gyroscope technologies commercially available, such as Mechanical Gyroscopes, silicon MEMS Gyroscopes, Ring Laser Gyroscopes (RLGs) and Fiber-Optic Gyroscopes (FOGs), are discussed. The main features of these gyroscopes and their technologies are linked to their performance.

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Section: Optical Gyroscopesmentioning

confidence: 99%

Gyroscope Technology and Applications: A Review in the Industrial Perspective

Passaro

Cuccovillo²,

Vaiani³

et al. 2017

Sensors

349

152

View full text Add to dashboard Cite

show abstract

“…The inability of the gyro to sense the input rotational rates at low inputs is called lock-in. To get rid of this lock-in, the gyro is subjected to to-and-fro vibration which is called as mechanical dithering [13,14,15] wherein the gyro is fixed to rigid body. In addition to mechanical dithering, a component called Pseudo Random Noise (PRN) [14] is also introduced into the amplitude of dither, ensuring that the gyro is brought to nearly continuous rotation rate all the time.…”

Section: B Gyro Output Pulsesmentioning

confidence: 99%

Ring Laser Gyros: Improving Precision and Accuracy Through Soft-Core Processor-Based Active Current Balance Control Approach- Simulation and Implementation Results

Sreeramulu,

Devi,

Rao

et al. 2023

IJRITCC

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In this article, we intend to demonstrate on digital active current control in ring laser gyros (RLG). The specific source errors that effect the performance of laser gyro is discussed. This work proposes a system of digital detection and control system to address deficiencies of the conventional analog circuits. The hardware framework is constructed using the Field Programmable Gate Array (FPGA) and the required analog interface, which incorporates driving and acquisition circuitry for the specific physics of gyros. The software flow is provided in full and uses the parallel PI (proportional-integral) control algorithms. The outcomes demonstrate that the precision of anode currents are accurately controlled within ±0.1µA along with cathode voltage, demonstrating that the performance of the digital system is superior to that of analog circuits, which will be very beneficial for the laser gyro application. The simulation results prove that the proposed approach has good result of balancing anode currents, meanwhile, it makes the sensor a good dynamic performance. In both anodes, the experimental findings are contrasted with balanced and unbalanced currents. The optimal constant current is obtained from the remarkable agreement between simulated and experimental results.

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“…Assuming that the rotation angular velocity ω, precession angular velocity ω 1 ; Angular between the shaft and the axis of rotation of nutation is θ, cone angle is θ 1 , so the dangerous angular of actually turns (that is the minimum angle between the cone and the ground of the gyro) is 90°-θ 1 -θ [4][5]. Fig.…”

Section: Three-dimensional Motion Analysis Of Gyromentioning

confidence: 99%

Optimization Analysis on Gyroscope’s Three Dimensions Complicated Motion and Lash-Force

Wen¹,

Lu²

2014

AMR

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The complicated motion of the gyroscope includes the rotation, the precession, the nutation and the sliding motion which are coupled, and it is affected by the lash-force by the whip. Taking the gyroscope which is moving stably as the research subject, according to the motion characteristics of the gyro’s rotation and precession, the gyro is assumed to be the two-force bar, and the coupled relationship of the gyroscope is analyzed quantitatively. The three-dimensional complicated motion in the different categories is analyzed. The nonlinear differential equations in the different categories is derived and linearized by the minor variables method, and then the three-dimensional motion equations on the rotation, precession, nutation and slipping of the gyroscope in the different categories is established. Take the big gym gyroscope as the example, the influence of the force, time and position of the whip on the motion state of the gyroscope is analyzed in detail, and provides the basis for the design of the gyroscope.

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Direct dither control without external feedback for ring laser gyro

Cited by 8 publications

References 5 publications

Gyroscope Technology and Applications: A Review in the Industrial Perspective

Gyroscope Technology and Applications: A Review in the Industrial Perspective

Ring Laser Gyros: Improving Precision and Accuracy Through Soft-Core Processor-Based Active Current Balance Control Approach- Simulation and Implementation Results

Optimization Analysis on Gyroscope’s Three Dimensions Complicated Motion and Lash-Force

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