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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.
유전적 알고리듬을 적용하여 머시닝센터 베드두께의 동하중을 고려한 최적설계에 관한 연구
조백희,성활경 한국공작기계학회 1999 한국생산제조학회지 Vol.8 No.1
This paper presents resizing design optimization method by utilizing genetic algorithm(GA), which consists of three basic operators : reproduction, crossover and mutation. The fitness and penalty function for resizing optimization ploblem are defined, and the flowchart of the developed computer program along with the descriptions of each modules is presented. Also, modelling for flexible-body dynamic analysis is presented. The model is composed of bodies, joints, and force elements such as translational spring-damper-actuator. The design object is to determine the wall thickness for minimum weight under dynamic displacement constraint.