Mr. Seung-Kyu Park Profile

Seung-Kyu Park

at Chungnam National Unv

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Publications (6)

Proceedings Article | 7 January 2008 Paper

Sliding mode control using neural network for IPM machine

Min Chan Kim, Jae Hoon Kim, Seung Kyu Park, Tae Sung Yoon

Proceedings Volume 6794, 67940E (2008) https://doi.org/10.1117/12.784178

KEYWORDS: Neural networks, Control systems, Inductance, Neurons, Dynamical systems, Computer simulations, Network architectures, Mechatronics, Device simulation, Electrical engineering

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Proceedings Article | 7 January 2008 Paper

A novel state feedback control based on SVR

FaGuang Wang, Seung Kyu Park, Min Chan Kim, Gun Pyong Kwak

Proceedings Volume 6794, 67940F (2008) https://doi.org/10.1117/12.784183

KEYWORDS: Feedback control, Dynamical systems, Statistical analysis, Pattern recognition, Device simulation, Complex systems, Mechatronics, Algorithm development, Distance measurement, Computer simulations

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The SVM is one of the methods which can introduce the statistical learning theory for solving the pattern recognition problem with small samples and learning problems such as function estimation. The relationships between the states with desirable responses can be expressed by some functions and these functions are estimated by using SVM. There are classification problems and regression problems in support vector machines. Only the support vector regression problem is used in this paper. This paper proposes a very novel method which makes it possible that state feedback controller can be designed for unknown dynamic system with measurable states. The SVR algorithm is used for the identification of inputoutput relationship. A virtual state space representation is derived from the relationship and the SVM makes the relationship between actual states and virtual states. For unknown dynamic systems, a state feedback controller can be designed based on the virtual system and the SVM makes the controller being with actual states. The results of this paper can give many opportunities that the state feedback control can be applied for unknown dynamic systems. The first step of this design method is to identify the input-output relationship of the unknown system as a transfer function by using SVR. Next step is to design a virtual system based on the transfer function. Final step is to derive the relationship between the actual states and virtual states by using SVM. The linear kernel function is used in SVR. A state feedback controller is designed based on the virtual system and the virtual system can be replaced by actual states by using the above relationship and it gives the actual states feedback controller. And simulation results are provided to show the performance of the proposed control method. Finally, the results of this paper make it is possible to the state feedback control theory to be used for unknown dynamic systems. This result can be expected to be applied to unknown nonlinear systems.

Proceedings Article | 2 May 2006 Paper

Sliding mode decoupling for IPM machine

Seung Kyu Park, Tae Won Kim, Tae Sung Yoon, Kun Pyoung Kwak, Ho Kyun Ahn

Proceedings Volume 6042, 60421B (2006) https://doi.org/10.1117/12.664600

KEYWORDS: Scanning probe microscopy, Control systems, Inductance, Computer simulations, Holmium, Mathematical modeling, Resistance, Temperature metrology, Magnetism, Systems modeling

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Proceedings Article | 13 January 2005 Paper

Laser ultrasonic testing system using a confocal Fabry-Perot interferometer with a fringe stabilization module

Sung-Hoon Baik, Seung-Kyu Park, Min-Suk Kim, Chang-Hwan Lim, Byung Heon Cha

Proceedings Volume 5629, (2005) https://doi.org/10.1117/12.572201

KEYWORDS: Ultrasonics, Confocal microscopy, Laser systems engineering, Interferometers, Fabry–Perot interferometry, Pulsed laser operation, Signal detection, Laser stabilization, Inspection, Helium neon lasers

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Proceedings Article | 23 December 2004 Paper

Adaptive optics system with a hierarchical algorithm for measuring and correcting wavefront distortions

Seung-Kyu Park, Sun Woong Ra, Sung-Hoon Baik, Min-Suk Kim, Chang-Hwan Lim, Byung-Heon Cha

Proceedings Volume 5639, (2004) https://doi.org/10.1117/12.571755

KEYWORDS: Wavefronts, Adaptive optics, Wavefront sensors, CCD cameras, Deformable mirrors, Sensors, Diffraction, Wavefront distortions, Image sensors, Actuators

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Proceedings Article | 5 September 2002 Paper

New centroid detection algorithm for the Shack-Hartmann wavefront sensor

Sung-Hoon Baik, Seung-Kyu Park, Cheol-Jung Kim, Young-Seok Seo, Young-June Kang

Proceedings Volume 4926, (2002) https://doi.org/10.1117/12.481700

KEYWORDS: Wavefront sensors, Detection and tracking algorithms, Adaptive optics

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Showing 5 of 6 publications

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