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유전자 알고리즘을 이용한 정밀 스테이지의 슬라이딩모드 제어기 설계에 관한 연구
조백희(Baekhee Cho),성활경(Hwalgyeong Seong) 한국생산제조학회 2010 한국생산제조학회지 Vol.19 No.1
This paper presents motion control of the precision stage composed of the piezoelectric actuator and flexible hinges. The stage shows approximately 27% overshoot when the stage was applied to 30V square wave input voltage. Also, the stage shows nonlinear response characteristics including hysteresis. This paper proposes feedback control technique to suppress the phenomenon of hysteresis and overshoot using the sliding mode control scheme with the integrator. Also, this paper suggests the method that searches important parameters of sliding mode control and observer using Genetic Algorithm. To demonstrate the effectiveness of the proposed control algorithm, experimental validations are performed.
정상상태 회전 해석기법을 이용한 타이어의 마모양상 예측
천호정(Hojeong Cheon),김성래(Seongrae Kim),성활경(Hwalgyeong Seong),성기득(Kideug Sung),조춘택(Chuntack Cho),이정민(Jeongmin Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Tire is one of the main parts of motor that generates driving force and braking force. As wearing features of tire among the main parts affects wear mileage, handling and braking distance by changing tire traction, forecasting of wearing features shall be considered to be an important element for assessing tires. This study was intended to identify a correlation between structural design factor of tire tread part and abnormal wear by using finite element model and to secure an independent technology for analyzing tire wear through an establishment of tire wear parameter including friction stress, slip velocity, wear energy and friction energy rate based on analytic technique for steady state rolling.
2차원 메카니즘의 동역학적 해석 프로그램 개발과 기계 프레스 설계에 대한 적용
성활경,김진홍 國立 昌原大學校 産業技術硏究所 1991 産技硏論文集 Vol.5 No.-
Lower-Pair joint로 구성되고 Spring, Damper등의 외력이 작용하는 평면 메카니즘 (Mechanism)의 동역학적 해석용 프로그램을 개발하였다. 각 Body의 구성을 표현하기 위해 Cartesian Coordinates를 사용하였고, 미분방정식 (Differential Equation)과 대수방정식 (Algebraic Equation)의 혼합방정식을 풀기위해 DE 프로그램을 사용하였다.