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IJAT Vol.12 No.3 pp. 275-281
doi: 10.20965/ijat.2018.p0275
(2018)

Paper:

Artificial Neural Networks for Tool Wear Prediction Based on Sensor Fusion Monitoring of CFRP/CFRP Stack Drilling

Alessandra Caggiano*,**,† and Luigi Nele***

*Fraunhofer Joint Laboratory of Excellence on Advanced Production Technology (Fh-J_LEAPT UniNaples)
P.le Tecchio 80, Naples 80125, Italy

**Department of Industrial Engineering, University of Naples Federico II, Naples, Italy

Corresponding author

***Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples, Italy

Received:
September 30, 2017
Accepted:
November 24, 2017
Online released:
May 1, 2018
Published:
May 5, 2018
Keywords:
drilling, composite material, sensor monitoring, artificial neural network, tool wear prediction
Abstract

An intelligent sensor monitoring procedure was implemented to monitor the drilling of carbon fiber reinforced plastic (CFRP)/CFRP stacks used in the assembly of aircraft fuselage panels; the signals from these sensors were then used to develop an artificial neural network-based cognitive paradigm to predict tool wear, which would allow on-line decision making regarding tool replacement. A multiple sensor system, capable of acquiring signals relative to thrust force, torque, and acoustic emission RMS, was employed during experimental drilling tests, under different rotational speed and feed conditions. Advanced sensor signal processing techniques, including signal conditioning and segmentation, as well as statistical feature extraction and data fusion, were implemented on the acquired signals. Selected statistical features extracted from the multiple sensor signals in the time domain were combined via sensor fusion techniques to construct sensor fusion pattern vectors. These were then fed to artificial neural networks for pattern recognition, with the goal of finding correlations which would allow the prediction of the corresponding tool wear. The tool wear prediction performed by the artificial neural network can be utilized to support decision making at the appropriate time for worn tool replacement, which is extremely useful for drilling automation, as well as for estimating the quality of the drilled holes.

Cite this article as:
A. Caggiano and L. Nele, “Artificial Neural Networks for Tool Wear Prediction Based on Sensor Fusion Monitoring of CFRP/CFRP Stack Drilling,” Int. J. Automation Technol., Vol.12, No.3, pp. 275-281, 2018.
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Last updated on Dec. 13, 2018