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주상래,진강규 한국마린엔지니어링학회 2000 한국마린엔지니어링학회지 Vol.24 No.2
This paper presents the design of an optimal state feedback controller for container cranes under some design specifications. To do this, the nonlinear equation of a container crane system is linearized and then augmented to eliminate the steady-state error, and some constraints are derived from the design specifications. Designing the controller involves a constrained optimization problem which classical gradient-based methods have difficulties in handling. Therefore, a real-coding genetic algorithm incorporating the penalty strategy is used. The responses of the proposed control system are compared with those of the unconstrained optimal control system to illustrate the efficiency.
주상래(Sang-Rae Joo),진강규(Gang-Gyoo Jin) 한국해양대학교 해사산업연구소 1998 海事産業硏究所論文集 Vol.8 No.-
In many controller design problems, the performance of systems is generally described in terms of overshoot, rising time, settling time, maximum input and so on. Keeping pace with the requirements of systems creates complex optimization problems. In this paper, a real coding genetic algorithm which can solve nonlinear constrained optimization problems is presented and the optimum setting of its control parameters is explored. The paper also includes the application of the proposed algorithm to PI controller tuning.