• 대한전기학회논문지
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• 제39권5호
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• pp.485-493
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• 1990

The idea of expert control is to incorporate a rule based expert system in a feedback control system. In this paper, we present some heuristic rules based on relay experiment for the choice of controller structure and the setting of the controller parameters. Heuristic rules are used as an element of the feedback loop in an auto-tuning PID controller. The algorithms are coded in a form which is as pure as possible and the heuristic logic is implemented with the rules. This paper reports an implementation of an expert controller on microcomputer-based system, including an industrial programmable controller.

• 한국수산과학회지
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• 제53권6호
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• pp.954-959
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• 2020

This study aimed to verify the effectiveness of rescue apparatus, that can capture crabs using external stimuli such as food and electricity, without relying on divers. In this study, a microcomputer-based controller and an IC-device-based controller were developed, and spot inspection was conducted using 20 modules and 30 sea urchin removal modules. Accordingly, 58, 18, 17, and 74 sea urchins were introduced in the first, second, third and fourth experiments, respectively. The result of evaluating the lure of each removal mechanism, based on the catch per unit effort, with an electrical stimulus was 1.1 (32/10), with a feeding stimulus was 3.4 (100/29), and with electrical and feeding stimuli was 3.5 (35/10).

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.413-417
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• 1989

The idea of expert control is to incorporate a rule based expert system in a feedback control system. In this paper, the expert system concepts are instead used as an element of the feedback loop in a single controller. The algorithms are coded in as pure form as possible and the heuristic logic is implemented as rules. This paper reports on effort to produce an implementation of an expert controller on microcomputer based system, including an industrial programmable controller.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.321-325
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• 1988

The objective of this study is to develop a microcomputer-based adaptive controller for an electro hydraulic velocity control system subjected to the variation of system parameters. The step response performance of the system with the adaptive controller is investigated for the variation of the external load torque, the moment of inertia and the reference inputs, and compared with that obtained by PID controller whose gains are constant. The experimental results show that this proposed model reference adaptive controller is robust to the variation of system parameters and yield much better control performance compared with the conventionel PID controller.

• 대한기계학회논문집
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• 제12권2호
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• pp.221-230
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• 1988

본 연구의 목적은 마이크로컴퓨터를 사용하여 유압모터로 구성된 전기 유압 서보 시스템의 속도제어를 하는데 있어서 제어방법과 제어기 기본 하드웨어인 마이크로프로세서와 A/D, D/A 변환기의 해상도(resolution)가 전체 시스템의 성능에 미치는 영향을 주로 실험적으로 연구하는데 있다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.658-662
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• 1986

In the microcomputer-based velocity control for an electro-hydraulic servo system, the effects of control methods and control hardware on the performance of the system were investigated. Experiments were carried out with PID and deadbeat controllers using 8 or 16 bit microprocessor and 8 or 12 bit A/D and D/A converters. It is found that the transient response of the system is better with PID controller than with deadbeat controller. When the number of bits of the microprocessor and converters are small, it is also found that amplitude quantization due to limited wordlength gives significant effects on transient responses of the system. Analytically predicted step-responses are in good agreement with experimental ones.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.658-663
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• 1987

The new controller developed here, which is the facility with only one measurement, is a new concept for the level controller of the existing nuclear steam generator. A MACS (Microcomputer-based Adaptive Control System of a Steam Generator) is quite practical and efficient, and has also simple structure and higher flexibility in the installment for actual plant. A key ingredient of this system is adaptive regulator which can calculate adaptive, optimal valve position in response to changes in the dynamics of the process and the disturbances. In spite of many difficulties in the steam generator water level control at low power, it can be concluded from the experimental and simulation results, that the MACS can provide optimal, robust steam generator level control from zero to full power. The amount of the control input effort can be reduced by adjusting the weighting factor. However, the steady state water level errors are generated. To avoid the steady errors, the different adaptive algorithm should be investigated in the future. The 3 second sampling time is acceptable for this system. However, action should be taken to shorten the sampling time for better digital control.

• 한국식품과학회지
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• 제25권4호
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• pp.391-394
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• 1993

탁주발효의 자동화를 위하여 발효 중 발생하는 기체를 측정할 수 있는 bubble counter와 제어장치를 개발하였다. 동 장치를 활용하여 pilot 규모의 탁주발효에 적용하였다. 탁주발효중 발생하는 기체를 계측하는 bubble counter는 photo-interruptor와 acryl관으로 구성하였으며, 계측되는 기체용적은 기포당 0.018ml였다. 그리고 탁주발효의 제어장치는 single chip microcomputer(MC68705R3)로 제작하였으며, 발효액의 온도를 측정, 제어하기 위하여 온도계측회로를 제작하였고, 냉각수 순환을 결정하는 solenoid valve의 작동으로 온도제어를 하였다. 동 장치를 운영하기 위하여 software를 작성하여 ROM에 구조화하였다. 동 장치로 $CO_2$ 발생량과 속도를 자동적으로 추정한 결과 알코올 농도곡선과 형태가 서로 유사함을 보여주었으며, $30^{\circ}C$ 발효조건에서 24시간때에 최대 발생량을 보였다. 알코올농도와 $CO_2$ 발생량은 뛰어난 상관관계를 보였으며, 이로부터 제어알고리듬을 작성할 수 있었다.

• 대한전자공학회논문지
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• 제17권4호
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• pp.18-22
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• 1980

Lately, the need for the use of calorimeter has been increased id Korea. Therefore, several met hods for the optimization of the microcomputer-based control system that can be used as a temperatare controller as well as a calorimeter are described in this paper. The instrument designed in this paper has been proved to be more powerful and costeffect ice than any other instrument not using microprocessor.

• 전자공학회논문지B
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• 제33B권8호
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• pp.124-133
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• 1996

This paper presents the implementation of variable structure control system for a linear or nonlinear system using neural networks. The overall control system consists of neural network controller and a reaching mode controller. While the former approximates the equivalent control input on the sliding surface, the latter is used to bring the entire system trajectories toward the sliding surface. No supervised learning procedures are needed and the weights of the neural network are tuned on-line automatically. The neural netowrk-based variable structure control system is applied to a nonlinare unstable inverted pendulum system through computer simulations, and implemented using a microcomputer (80486-50MHz) and applied to the DC servomotor position control system. Simulation and experimental results show the expected approximation sliding property is occurred. The proposed controller is compared with a PID controller and shows better performance than the PID controller in abrupt plant parameter change.