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슬라이딩 모드 제어기가 적용된 샘플치 시스템에 대한 안정도 판별 조건
박흠용(Heum-Yong Park),조영훈(Young-Hun Jo),박강박(Kang-Bak Park) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.2
Although most of control methods have been studied in the continuous-time domain, the actual control systems have been implemented using MCU (Micro Control Unit) and/or microprocessors so that the overall systems turn to be sampled-data systems. In this case, the stability criterion of the closed-loop system is not easy to derive. In this paper, a simple stability criterion for the sampled-data system with sliding mode controller is derived.
DC 모터 시스템을 위한 짧은 샘플링 시간을 갖는 이산슬라이딩 모드의 최종 수렴범위
박흠용(Heum-Yong Park),조영훈(Young-Hun Jo),박강박(Kang-Bak Park) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.3
Almost all of control schemes proposed so far have been designed in the continuous-time domain theoretically. Actual systems, however, have been implemented in the discrete-time domain since Micro Control Unit(MCU) and/or microprocessors have been used for the controllers. Thus, the overall system turned to be a sampled-data system, and generally speaking, the ultimate error cannot converge to zero in the actual system even though the proposed control algorithm showed the asymptotic stability in the continuous-time domain. In this paper, therefore, the ultimate error bound of a sampled data system with a short sampling period has been investigated. The ultimate error is shown to be related in the sampling period.
권순홍(Soon Hong Kwon),진병연(Byungyun Jin),박강박(Kang-Bak Park) 한국산업융합학회 2016 한국산업융합학회 논문집 Vol.19 No.4
There are many hoppers in the actual industrial plants such as grain hoppers in agricultural companies, surge hoppers in steel companies, and so on. In general, they are time-delay systems so that their level control is not easy. Thus, they have been manually controlled to avoid the overflow and empty out. In this paper, we proposed Fuzzy PID controller for level control of hopper systems. To show the effectiveness of the proposed scheme, some simulation results are given.
조영훈(Young-Hun Jo),이용화(Yong-Hwa Lee),박강박(Kang-Bak Park) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.3
The terminal sliding mode control schemes have been studied a lot since they can guarantee that the state error gets go zero in a finite time. However, the conventional terminal sliding surfaces have been designed using power function whose exponent is a rational number between 0 and 1, and whose numerator and denominator should be odd integers. It is clearly restrictive. Thus, in this paper, we propose a novel terminal sliding surface using power function whose exponent can be a real number between 0and 1.
유한 시간 수렴을 보장하는 타원형 슬라이딩 모드 제어기의 설계
조영훈(Young-Hun Jo),이용화(Yong-Hwa Lee),박강박(Kang-Bak park) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.4
Almost all of control methods proposed so far have been designed such that the overall system guarantees asymptotic stability. It implies that the output converges to zero but not reaches to zero in a finite time. In many actua1 cases, however, it is preferable to design the controller such that the output gets to zero in a finite time. In this paper, we proposed a novel elliptical sliding surface. To show the effectiveness of the proposed method, experimental results are given