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서강면,강문성 청주대학교 산업과학연구소 1997 産業科學硏究 Vol.15 No.-
This paper describes the development of Trunk Interface Board(TIB) which provides a trunk interface(Tl/El) and tone generating function for originating number tracing system. It is consist of following parts, control part, sending/receiving part, clock synchronization and distribution part, tone generating part and status maintenance/management part To achieve a low-cost, compactness, flexibility, and reliability, easily programmable single-chip micro-controller and firmware technique are used. From the experimental results using off-line test-bed and on-line field target system, we confirmed that TIB is more compact and flexible than the previous developed board.
2차원 도립전자를 위한 GA 및 Heuristic한 제어규칙 비나 PID제어기의 실험적 연구
서강면,강문성 제어·로봇·시스템학회 2003 제어·로봇·시스템학회 논문지 Vol.9 No.8
We have fabricated the two-dimensional inverted pendulum system and designed its controller. The two-dimensional inverted pendulum system, which is composed of X-Y table, is actuated through timing belt by each of two geared DC motors. And the control goal is that the rod is always kept to a vertical position to any disturbance and is quickly moved to the desired position.Because this system has generally nonlinear dynamic characteristics and X-axis and Y-axis move together, it is very difficult to find its exact mathematical model and to design its controller. Therefore, we have designed the PID controller with simple structure and excellent performance. Genetic algorithm(GA), which is known as one of probabilistic searching methods, and human's heuristic control strategy are introduced to design an optimal PID controller. The usefulness of the proposed GA based PID coefficient searching technique is verified through the experiments and computer simulations.
Kohonen Network을 이용한 로보트 매니퓰레이터의 퍼지 제어기 구성
서강면,강문성 청주대학교 산업과학연구소 1994 産業科學硏究 Vol.12 No.-
This paper presents a fuzzy controller and neuro-fuzzy controller which fuzzy rules are automatically generated, to control robot manipulator. Performances of these controllers were evaluated by comparing with simulation results for a two-link robot manipulator. The membership functions of the fuzzy controller first approximated by studying the response of a traditional PD controller and then tuned to achieve the best response by trial and error method. In a neuro-fuzzy controller, the fuzzy rules can be obtained with the fuzzy clustering scheme using Kohonen network and differential competitive learning algorithm based on input/output data. The computer simulation results show that neuro-fuzzy controller, generates automatically fuzzy rules, is more robust to the disturbance than the traditional PD controller in the transient state response.
H∞놈과 Pre-filter을 이용한 비선형시스템의 안정화 제어기 설계
서강면(Kang-Myun Seo) 한국산업기술융합학회(구. 산업기술교육훈련학회) 2021 산업기술연구논문지 (JITR) Vol.26 No.4
This study analyzes the design of stabilization controllers for nonlinear systems. The proposed method is based on the synthesis control method of the H∞ norm and prefilter, which is a low-pass filter. The low-pass filter is coupled to structure an open-loop transfer function such that sensitivity and complementary sensitivity functions possess desirable frequency characteristics. The H∞ controller, which was designed to validate the proposed controller method, was applied to a representative nonlinear system of an inverted pendulum system, and results were compared with the with that of a PID controller application. Simulation results show that the designed controller well adhered to control objectives while reducing the influence of modeling error and noise.
Rod Balancing System의 제어기 구성에 관한 연구
김상규,서강면,강문성 청주대학교 산업과학연구소 2002 産業科學硏究 Vol.19 No.2
In this paper we have fabricated the two-dimensional Rod Balancing System which expands conventional one-dimensional inverted pendulum control system and designed its controller. The X-axis cart and Y-axis bar of the Rod Balancing System, which is composed of X-Y table, are actuated through timing belt by each of two geared DC motors, and the rod mounted on a X-axis cart can be brought to the desired position and maintained in a vertical position by motor-control. For the control of the Rod Balancing System, we used a fuzzy logic controller that is an approach to systems control when the exact mathematical model of the plant is unknown or the mathematical model is too complex to understand.
집진장치용 Fuzzy형 Solenoid Valve Controller의 개발
박정훈,홍성훈,서강면,강문성,심형관,유충현 청주대학교 산업과학연구소 1999 産業科學硏究 Vol.17 No.1
In this study, an intelligent solenoid valve controller has been developed for automatic maintaining of filters in a dust collecting system. This controller has automatic controllability of solenoid valves' ON/OFF time depending on the clogging status of filters, and then it can extend the filters' lifetimes, decrease the power consumption, and make effective operation of the system possible. This controllability has been executed by the fuzzy theory that utilizes the workers' experimental knowledges, the control expert's knowledges and the differential pressures between the inlets and outlets measured by the sensors.