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An Investigation of Eddy-Current Effects on Parameter Monitoring for Duplex Lathe Machining of Thin-Wall Components

[+] Author Affiliations
Kok-Meng Lee

Georgia Institute of Technology, Atlanta, GAHuazhong University of Science and Technology, Wuhan, Hubei, China

Min Li

Georgia Institute of Technology, Atlanta, GA

Kun Bai

Huazhong University of Science and Technology, Wuhan, Hubei, China

Paper No. DSCC2014-6193, pp. V003T45A005; 7 pages
  • ASME 2014 Dynamic Systems and Control Conference
  • Volume 3: Industrial Applications; Modeling for Oil and Gas, Control and Validation, Estimation, and Control of Automotive Systems; Multi-Agent and Networked Systems; Control System Design; Physical Human-Robot Interaction; Rehabilitation Robotics; Sensing and Actuation for Control; Biomedical Systems; Time Delay Systems and Stability; Unmanned Ground and Surface Robotics; Vehicle Motion Controls; Vibration Analysis and Isolation; Vibration and Control for Energy Harvesting; Wind Energy
  • San Antonio, Texas, USA, October 22–24, 2014
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4620-9
  • Copyright © 2014 by ASME


This paper presents a novel design of an eddy-current sensing system with an array of high-accuracy solid magnetic sensors for duplex lathe machining of thin-wall compressor disks. By controlling the penetration depth of the eddy current, the dual-frequency sensing system based on measured magnetic flux density simultaneously measures the in-feed cutting depth and workpiece thickness in real-time. Specifically, this paper provides the design concept and operational principle of the eddy-current sensing system along with the theory for designing the sensor and analyzing its performance. As eddy current cannot be measured directly, results of a numerical investigation based on finite-element analyses are presented with illustrative examples offering new physical insights into the effects of optimal design parameters on the magnetic and electric field distributions of the induced eddy-current. The effectiveness of a dual-frequency eddy-current sensor has been numerically evaluated and compared against experimental data of a commercial eddy-current sensor operated at 1MHz.

Copyright © 2014 by ASME



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