Taeil Kim
Seoul National University · 工学
研究室紹介
Professor Taeil Kim's research lab specializes in advanced control systems and signal processing for mechatronic and industrial servo systems, with a strong focus on resonance suppression and digital control optimization. The lab develops innovative discretization techniques and adaptive filtering methods—particularly adaptive notch filters (ANF)—to enhance system performance under high-frequency and limited sampling conditions. Additionally, the lab explores educational applications of scientific inquiry in science textbooks, comparing curricular designs across countries to inform effective science teaching practices.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
15This paper presents an online tuning method for notch filter depths in industrial servo systems. Notch filters are commonly utilized to suppress resonances in servo systems. Using a damping ratio of notch-filter zeros is especially important when the resonance has a damped behavior. This paper develops an online tuning method to adjust the damping ratio of notch-filter zeros, by adjusting the depth parameter of a bi-quad notch filter. The developed tuning method uses the electrical current comma
Modern mechatronics systems are implemented digitally. However, the magnitude and phase errors caused in the discretization process severely restrain the control performance in systems with high-frequency components where only a few sampled data points are available per period. This paper presents a new accurate discretization method for mechatronics systems that provide good performance even when intrinsic frequency components are close to the Nyquist frequency which is one-half of the sampling
Antimicorbial effect of Zea Mays L. and Magnoliae cortex extract mixtures on periodontal pathogen and effect on human gingival fibroblast cellular activity
본 연구는 한국과 싱가포르의 중학교 과학 교과서에 실린 물리 영역의 탐구 활동을 비교분석함으로써 차기 과학과 교과서 탐구 활동 구성에 대한 시사점을 얻기 위한 목적을 지닌다. 두 나라의 교과서 탐구 활동을 탐구 활동의 일반적인 특징과 참 과학 탐구(authentic scientific inquiry)의 반영 정도라는 두 가지 측면에서 분석하였는데, 이를 위해 각각 Millar et al.(1998)의 탐구 활동 분석틀과 Chinn & Malhotra(2002)의 분석틀을 수정 보완하여 이용하였다. 연구 결과, 두 나라 탐구 활동의 목적, 학생의 사고 관련 활동, 과제의 개방성 정도에서 차이가 발견되었다. 탐구 활동의 목적 영역에서 한국은 내용 중심적인 활동이 많았고, 싱가포르는 과정 중심적인 활동이 많았다. 학생의 사고 관련 활동 영역에서 싱가포르에는 한국에는 드문 ‘예상한 것 검증하기’ 등의 사고 관련 활동이 있었으며, 탐구의 개방성 정도도 싱가포르가 한국보다 높았다. 두 나라의
This paper presents an application of a discrete derivative method with a new frequency mapping technique for adaptive-notch-filter (ANF) based resonance suppression in an actual industrial servo system. An ANF includes a frequency estimator which estimates the frequency of input signal in real time. A new discrete derivative method, which utilizes a modified bilinear transform, was recently developed to improve the frequency estimation performance of ANF and applied to computer simulation cases
본 연구의 목적은 중학교 과학교사들의 전기와 자기에 대한 개념의 이해 정도를 조사하여, 성별, 교직 경력별, 전공 교과별로 개념에 대한 이해도의 차이를 비교함으로써 교육적 시사점을 얻고자 하는 것이다. 이를 위해 선행 연구들에서 사용한 개념 검사도구 중 중학교 과학과 교육과정과 밀접한 관련이 있는 검사 문항을 추출하여, 이를 개념 검사 도구로 활용하였다. 연구 대상은 S시 소재 중학교에 근무하는 과학교사 81명으로, 물리, 화학, 생물, 지구과학 전공자의 수는 각각 36명, 23명, 14명, 8명이다. 연구 결과 성별, 교직 경력별로는 점수 차이가 없었으나, 대학 학부 전공 교과별로는 차이가 있었으며, 전기와 자기에 대한 개념 중 차폐 효과, 전하가 자기력을 받는 상황, 접지 등의 개념 이해도가 낮았다.
The effects of Magnoliae cortex and Zea Mays L.extract mixtures on experimentally inducedperiodontitis of beagle dog
This paper presents an application of a discretization method with a new phase compensation technique for adaptive-notch-filter (ANF) based resonance suppression in an actual industrial servo system. The ANF includes a frequency estimator which estimates the frequency of the vibration in the input signal in real time and automatically filters it out. Because the ANF is designed in the continuous-time domain, a discretization process is required for digital implementation. However, the discretiza
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Purpose: This study was performed to evaluate the periodontal wound healing effect of particulate equine bone mineral on canine alveolar bone defects. Methods: Twelve adult male beagle dogs were used as study subjects. The mandibular second and fourth premolars were extracted prior to the experimental surgery, and the extraction sites were allowed to heal for 8 weeks. After periodontal probing,two-walled defects were created at the mesial and distal sides of the mandibular third premolars bilate
The effect of zea Mays L. and Magnoliae cortexextracts mixture on the rat calvarial defects ;in vivo study of bone regenerative activity
Purpose: The aim of this study was to investigate the effect of tongue cleaner-equipped manual toothbrush on tooth cleanness, tongue cleanness and malodor index. Materials and methods: 504 subjects were included in this study. At 1st visit, basic information such as age, sex, smoking amount and alcohol consumption was recorded. Self assessment by individual subjects was performed regarding satisfaction to old toothbrush and toothbrushing habit. Tooth cleanness, tongue cleanness and malodor index