Dr. Seok Jun Moon Profile

Dr. Seok Jun Moon

Senior Researcher at Korea Institute of Machinery & Materials

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Publications (3)

Proceedings Article | 15 April 2011 Paper

Development of hybrid type pneumatic vibration isolation table by piezo-stack actuator and filtered-X LMS algorithm

Yun-ho Shin, Dong-doo Jang, Seok-jun Moon, Hyung-Jo Jung, Yeong-jong Moon, Chang-kyu Song

Proceedings Volume 7981, 79813H (2011) https://doi.org/10.1117/12.881203

KEYWORDS: Actuators, Vibration isolation, Algorithm development, Filtering (signal processing), Control systems, Optical filters, Finite impulse response filters, Ions, Amplifiers, Electronic filtering

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Proceedings Article | 8 April 2008 Paper

Integrated design method of MR damper and electromagnetic induction system for structural control

Heon-Jae Lee, Seok-Jun Moon, Hyung-Jo Jung, Young-Cheol Huh, Dong-Doo Jang

Proceedings Volume 6932, 69320S (2008) https://doi.org/10.1117/12.776160

KEYWORDS: Electromagnetic coupling, Control systems, Magnetism, Control systems design, Electromagnetism, Sensors, Head, Manufacturing, Bridges, Buildings

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Magnetorheological (MR) dampers are one of the most advantageous control devices for civil engineering applications to natural hazard mitigation due to many good features such as small power requirement, reliability, and low price to manufacture. To reduce the responses of a structural system by using MR dampers, a control system including a power supply, control algorithm, and sensors is needed. The control system becomes complex, however, when a lot of MR dampers are applied to large-scale civil structures, such as cable-stayed bridges and high-rise buildings. Thus, it is difficult to install and/or maintain the MR damper-based control system. To overcome the above difficulties, a smart passive system was proposed, which is based on an MR damper system. The smart passive system consists of an MR damper and an electromagnetic induction (EMI) system that uses a permanent magnet and a coil. According to the Faraday law of induction, the EMI system that is attached to the MR damper can produce electric energy and the produced energy is applied to the MR damper to vary the damping characteristics of the damper. Thus, the smart passive system does not require any power at all. Besides the output of electric energy is proportional to input loads such as earthquakes, which means the smart passive system has adaptability by itself without any controller or sensors. In this paper, the integrated design method of a large-scale MR damper and Electromagnetic Induction (EMI) system is presented. Since the force of an MR damper is controllable by altering the input current generated from an EMI part, it is necessary to design an MR damper and an EMI part simultaneously. To do this, design parameters of an EMI part consisting of permanent magnet and coil as well as those of an MR damper consisting of a hydraulic-type cylinder and a magnetic circuit that controls the magnetic flux density in a fluid-flow path are considered in the integrated design procedure. As an example, a smart passive control system for reducing stay cable responses is considered in this investigation and it will be fabricated and tested through experiment in the future.

Proceedings Article | 16 May 2005 Paper

Vibration control of a beam using linear magnetostrictive actuators

Seok-Jun Moon, Chae-Wook Lim, Byung-Hyun Kim, Young-Jin Park

Proceedings Volume 5760, (2005) https://doi.org/10.1117/12.597966

KEYWORDS: Actuators, Control systems, Magnetism, Vibration control, Magnetostrictive materials, Motion models, Mathematical modeling, Analytical research, Finite element methods, Logic

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