A Novel Frequency Domain Transmitometry for Damage Detection in Aircraft Data Transmission Lines

Abstract

This paper presents a novel processing method of the transmitted signal that does not require any additional circuitry. The novel approach utilizes phase and frequency of the transmitted signals obtained in frequency domain. Transmitted signal phase change and magnitude under the effect of any discontinuity is processed using Inverse Fast Fourier Transform (IFFT), where pseudo-time domain response of transmitted signal is derived from frequency domain. The area under the curve (AUC) of the transmitted signal from the damaged region proved to be successful to detect and locate the damage. The results show that the magnitude of the transmitted signal at the damage point increases with the magnitude of the damage. The deeper the damage in the coaxial line, the higher the magnitude of the transmitted signal at the point of damage. In this paper three types of damages were intentionally induced in three aerospace grade transmission lines. The responses for the pristine cable conditions and the three damaged conditions differed by the peak of the transmitted signal at the point of damage. Connection points of the cables in pseudo-time domain signal were at 1m and 3m and damage at 2m. The cable was 2m long and damage was induced at the middle of the cable. The first peak was observed at 1m due to time delay between signal generation and receiving points. The AUC of the damage peaks in transmitted signal has a linear relationship with the actual damage width that was successfully used to determine damage level and width.

Department(s)

Mechanical and Aerospace Engineering

Comments

Missouri University of Science and Technology, Grant TCA311201

Keywords and Phrases

Aircraft Data Transmission Line; Coaxial cable; Damage detection; Frequency Domain Transmitometry; Non-destructive evaluation; Structural health monitoring

International Standard Book Number (ISBN)

978-151068660-1

International Standard Serial Number (ISSN)

1996-756X; 0277-786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Society of Photo-Optical Instrumentation Engineers (SPIE), All rights reserved.

Publication Date

01 Jan 2025

Link to Full Text

Share

 
COinS