:: ICCAS 2015 ::

FB02		Control Applications II
Time : 13:30~15:00 Room : 102		Chair : Nan-Chyuan Tsai (National Cheng Kung University, )



13:30~13:45	FB02-1

Hybrid Magnetic Bearing Regulation via Super Twisting Control
Mohamed S. Kandil(Universite de Sherbrooke, Canada), Philippe Micheau(Université de Sherbrooke, Canada), João P. Trovão(Universite de Sherbrooke, Canada), Loicq S. Bakay(Alstom Power, Canada), Maxime R. Dubois(Universite de Sherbrooke, Canada)

A homopolar hybrid magnetic bearing (HMB) is a suitable solution to reduce power losses in active magnetic bearing systems. This configuration is complex due to the coupling between the coil-created magnetic fluxes and permanent magnet fluxes, besides being inherently a nonlinear, unstable, and multivariable system. In this paper, we propose the application of super twisting controller for the stabilization of a rigid rotor horizontally supported by a radial HMB. The efficiency of the applied controller is demonstrated via simulations in the presence of harmonic disturbances.



13:45~14:00	FB02-2

Decentralized H-infinity Control of Large-scale Descriptor Systems using Proportional-plus-derivative State Feedback
SungBin Kim, wookyong Kwon, Jaepil Ban, Sangchul Won(POSTECH, Korea, Republic of )

This paper is concerned with the problem of decentralized H1 proportional-plus-derivative(PD) state feedback control of uncertain large-scale descriptor systems. The uncertainties are assumed to be polytopic type and appearing in derivative matrices as well as state and input matrices. Sufficient condition for stabilization of uncertain large-scale descriptor systems via H1 PD state feedback is addressed in terms of Linear Matrix Inequalities(LMIs). A numerical example is given to prove the effectiveness of the proposed control method.



14:00~14:15	FB02-3

Image Stitching Algorithm for Camber Measurement in Hot Rolling Process : Cross-Correlation Approach
Min Su Kim, Won Il Lee, JinWoo Yoo, POOGYEON PARK(POSTECH, Korea, Republic of )

In the endless hot rolling process, camber is one of the most significant defects which cause decreasing of quality and productivity of steel. For measuring the camber of the strip, the whole image of strip is necessary. If the camera of the measurement system can only capture the part of the strip, we should stitch the consecutive partial images to obtain the whole image of strip. This paper proposes a novel algorithm to stitch the consecutive partial images based on the cross-correlation approach which has fast computational speed and high accuracy.



14:15~14:30	FB02-4

To Prevent Crack for Thin-wall Workpieces during Milling Process by Torque Feedback
Mu-Ping Tsai, Nan-Chyuan Tsai, Chun-Chi Lin, Hsin-Lin Chiu(National Cheng Kung University, Taiwan)

This research is focused on how to real-time formulate the appropriate applied cutting torque via feedback of spindle motor current. The torque estimation approach by spindle motor current feedback and the corresponding fuzzy logic controller are employed. Compared with constant cutting torque during milling operation in tradition manner, it is observed that the time consumption of milling cycle by aid of the aforesaid fuzzy logic controller is greatly shortened while the resulted cutting accuracy upon finish of workpiece can be almost retained.



14:30~14:45	FB02-5

Efficient Algorithm for Evacuation Problem Solving
Ainur Kholdasovna Kozbakova, Aliya Kalizhanova(Kazakh National Technical University after K.I.Satpaev, Kazakhstan), Zhazira Amirgaliyeva(Kazakh National University named after al-Farabi, Kazakhstan), Yedilkhan Amirgaliyev(Institute of Information and Computing technologies, Kazakhstan)

Efficient Algorithm for Evacuation Problem Solving



14:45~15:00	FB02-6

Experimental Analysis of Electromagnetic Vibration Damping of a Cantilever Beam
Muhammad Rizwan Siddiqui, Iftikhar Ahmad, Masroor Khan, Sarwat Mushtaq Ahmad(Ghulam Ishaq Khan Institute of engineering sciences and technology, Pakistan)

The present study is related to magnetic dampers. In which one a flexible cantilever beam's vibrations are controlled using two electromagnets, one at the top and other on the bottom. The new concept is that one of the electromagnets is kept constant while other has changing PWM.