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Related Concept Videos

Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Published on: February 28, 2016

Triangular phase-modulation approach to an open-loop fiber-optic gyroscope.

P Y Chien, C L Pan, L W Chang

    Optics Letters
    |September 29, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A novel fiber optic gyroscope offers a wide dynamic range and linear scale factor. This new method uses phase modulation and gate switching for signal processing, improving performance.

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    Area of Science:

    • Optics and Photonics
    • Sensor Technology
    • Fiber Optic Systems

    Background:

    • Traditional fiber optic gyroscopes face limitations in dynamic range and linearity.
    • Accurate measurement of Sagnac phase shift is crucial for gyroscope performance.

    Purpose of the Study:

    • To introduce a new signal processing technique for open-loop, all-fiber gyroscopes.
    • To achieve a wide dynamic range and a linear scale factor in fiber optic gyroscopes.

    Main Methods:

    • Utilizing a triangular phase-modulation waveform for signal processing.
    • Employing gate switching to convert Sagnac phase shift into an electrical signal.
    • Developing an open-loop, all-fiber gyroscope architecture.

    Main Results:

    • Demonstrated a wide dynamic range for the fiber optic gyroscope.
    • Achieved a linear scale factor, enhancing measurement accuracy.
    • Successfully converted Sagnac phase shift into a low-frequency electrical signal.

    Conclusions:

    • The proposed technique offers a viable solution for enhancing fiber optic gyroscope performance.
    • This approach provides a linear and wide dynamic range output for inertial sensing applications.