Online Realizations of Dynamic Gap Detection and Control for Levitated Industrial Steel-Plate Conveyance System

To design a stable and fully controllable process for conveying steel plates with less noise, we have extensively investigated the feasibility of incorporating the structure that can provide appropriate extra electromagnetic attraction forces. By implementing appropriate fixed electromagnetic poles on top of the rollers at the run-out table of a steel mill, controllable lift and propulsive forces can thus be provided to drive the movable steel plate to the desired 2-D directions. Based on the stringent operational environment at a steel mill, an online recursive gap detection scheme combined with a real-time fuzzy-based controller has been developed. Realization results showed that the system, being implemented with the proposed fine-tuned processing/control scheme, can supply rapid and accurate online 2-D controls onto the steel plates and thus fulfill the design and operational objectives.

[1]  Dinkar Prasad,et al.  Controller Design for Large-Gap Control of Electromagnetically Levitated System by Using an Optimization Technique , 2008, IEEE Transactions on Control Systems Technology.

[2]  Pheng-Ann Heng,et al.  A double-threshold image binarization method based on edge detector , 2008, Pattern Recognit..

[3]  Cheng-Tsung Liu,et al.  Electromagnetic field and force analyses of a non-contacting conveyance system for steel mill application , 2002 .

[4]  Chia-Hsiang Menq,et al.  Automatic camera calibration for a multiple-sensor integrated coordinate measurement system , 2001, IEEE Trans. Robotics Autom..

[5]  J. F. Gieras,et al.  Analytical Calculation of Electrodynamic Levitation Forces in a Special-Purpose Linear Induction Motor , 2012, IEEE Transactions on Industry Applications.

[6]  G Pellegrino,et al.  Accurate Inverter Error Compensation and Related Self-Commissioning Scheme in Sensorless Induction Motor Drives , 2010, IEEE Transactions on Industry Applications.

[7]  Damrongrit Piyabongkarn,et al.  Development of a real-time digital control system with a hardware-in-the-loop magnetic levitation device for reinforcement of controls education , 2003, IEEE Trans. Educ..

[8]  Keisuke Fujisaki.  Application of electromagnetic force to run out table , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[9]  Cheng-Tsung Liu,et al.  Development of an Automatic On-line Gap Detection Scheme for Levitated Industrial Steel Plate Conveyance System , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[10]  H. Ohsaki,et al.  A combined lift and propulsion system of a steel plate by transverse flux linear induction motors , 1999, IEEE International Magnetics Conference.

[11]  G. Hausler,et al.  Triangulation With Expanded Range Of Depth , 1985 .

[12]  Ahmed El Hajjaji,et al.  Modeling and nonlinear control of magnetic levitation systems , 2001, IEEE Trans. Ind. Electron..

[13]  Cheng-Tsung Liu,et al.  Analytical model development of an eddy-current-based non-contacting steel plate conveyance system , 2008 .