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Related Concept Videos

Linear time-invariant Systems01:23

Linear time-invariant Systems

316
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
316

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Related Experiment Video

Updated: Aug 9, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Theoretical modeling and simulation of fiber Bragg grating sensor interrogator based on linear variable filter.

Yi Liu, ZhaoYi Liu, Anyi Huang

    Optics Express
    |February 24, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a compact, lightweight, and vibration-resistant Fiber Bragg Grating (FBG) sensor interrogator for aircraft. The new linear variable filter (LVF)-based system enhances aviation safety by enabling reliable online monitoring of aircraft operating conditions.

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    Last Updated: Aug 9, 2025

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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    Published on: September 30, 2019

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    Area of Science:

    • Aerospace Engineering
    • Optical Sensing Technologies
    • Materials Science

    Background:

    • Increasing aviation accidents highlight the need for enhanced aircraft safety measures.
    • Online monitoring of aircraft operating conditions is crucial for proactive safety management.
    • Existing Fiber Bragg Grating (FBG) sensor interrogators face limitations in size, weight, and vibration resistance for aviation applications.

    Purpose of the Study:

    • To propose and design a novel Fiber Bragg Grating (FBG) sensor interrogator suitable for aviation environments.
    • To address the limitations of current FBG interrogators regarding size, weight, and vibration resistance.
    • To develop a system that meets the stringent requirements of the aviation field for aircraft operating condition detection.

    Main Methods:

    • Development of an optical model for the proposed linear variable filter (LVF)-based FBG sensor interrogator.
    • Analysis of key performance-determining parameters and discussion of design criteria.
    • Design of the optical system specifically tailored to aviation requirements.

    Main Results:

    • The designed LVF-based FBG sensor interrogation system demonstrates a wide bandwidth range of 90 nm (1505 nm-1595 nm).
    • The system achieves a high resolution of 2 pm, enabling precise measurements.
    • The interrogator has a sensor capacity of up to 15 FBG sensors.

    Conclusions:

    • The proposed LVF-based FBG sensor interrogator effectively meets the size, weight, and vibration resistance requirements for aviation applications.
    • This technology offers a viable solution for enhancing aircraft safety through reliable online operating condition monitoring.
    • The developed system shows significant potential for widespread adoption in the aviation industry.