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- 저자 : 황형수 (검색결과 112 건)
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황형수,류영국,모영승 원광대학교 2001 論文集 Vol.26 No.-
제어계의 축소 모델을 구하는 방법을 이용하여 Wang등은 다양한 동특성을 갖는 공정들에 대하여 범용적으로 적용할 수 있는 PID 동조 알고리즘을 제안하였다[7]. 그러나 Wang이 제안한 방법은 공정모델에 영점이 존재하지 않는 경우와 Nyquist선도가 -π/2및 -π를 지나는 경우에는 잘 적용이 되지만 공정모델에 영점이 존재하는 경우에는 동조 성능이 만족스럽지 못하였다. 본 논문에서는 공정 모델에 영점이 존재할 경우 Pade 축소법을 응용함으로써 이를 개선한 방법을 제안하였다. 이 방법은 저차 및 고차, 크고 작은 지연시간, 단조롭거나 진동하는 응답등의 다양한 동특성을 갖는 공정들에 범용적으로 적용할 수 있으며, 시뮬레이션을 통하여 이 방법이 다양한 공정에 우수한 특성을 나타냄을 보였다. The PID tuning algorithm which can applied generally to processes with varies dynamic characteristics is proposed by Wang[7]. However, it can be applied well to process model without zeros and with ∠G(jw)=- π/2 and - π point in Nyquist curve, but it gives unsatisfactory tuning performance for processes with zeros and without ∠G(jw)=- π/2 and - π in Nyquist curve. In this paper, the method which improve it using Pade reduction method is proposed. Satisfactory responses can be expected for processes with various dynamics, including those with low or high order, small or large dead time, monotonic or oscillatory responses. Simulation examples are given to show the effectiveness and flexibility of the controller in handling processes of different characteristics.
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황형수,박승규,채원석 원광대학교 공업기술개발연구소 1988 工業技術開發硏究誌 Vol.8 No.-
Abstract This paper reports on aspects in the design of Hanguel programming language which reflects not only programming language requirements but also characteristics of Hanguel natural language. And this paper analyzed the direction of research in Hanguel programming language .
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황형수,주수종 원광대학교 공업기술개발연구소 1990 工業技術開發硏究誌 Vol.10 No.-
Abstract Generally, there are 3 methods which create view relations, i.e, reexecution, reexecution usiug secondary index, and view index method, But view index method is not used and evaluated its performance, yet. Hence, this paper studies the maintenance cost analysis and comparison of increamental view relation of the above methods, respectively, as an environment considered the execution of the only unary query(select). The result of this paper shows numbers of block access(cost) of each method and relationships among 3 methods
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황형수,최정내,이원혁,Hwang, Hyeong-Su,Choe, Jeong-Nae,Lee, Won-Hyeok 대한전기학회 2000 전기학회논문지 D Vol.49 No.11
In this paper, we proposed a new PID tuning algorithm by the fuzzy set theory to improve the performance of the PID controller. The new tuning algorithm for the PID controller has the initial value of parameter Kc, $\tau$I, $\tau$D by the Ziegler-Nichols formula using the ultimate gain and ultimate period from a relay tuning experiment. We get error and error change of plant output correspond to the initial value and new proportion gain(Kc) and integral time($\tau$I) from fuzzy tunner. This fuzzy tuning algorithm for PID controller considerably reduced overshoot and rise time compare to any other PID controller tuning algorithms. In real parametric uncertainty systems, the PID controller with Fuzzy auto-tuning give appreciable improvement in the performance. The significant properties of this algorithm is shown by simulation In this paper, we proposed a new PID algorithm by the fuzzy set theory to improve the performance of the PID controller.
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황형수 圓光大學校 1992 論文集 Vol.26 No.2
The problem of reduced-order modeling of high, linear, time invarient, single input single output system is considered. In this paper, a new method which composed the Pade' approximation based on simple in computational process and the Routh approximation base on stability is proposed. This method need not reciprocal transformation and is very simple in computational process and would satisfied the stability of reduced model if the original system model is stable.
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시간논리 구조와 Petri Net의 합성방법을 사용한 이산사건 시스템의 모델링
김진권,모영승,류영국,황형수 圓光大學校大學院 1999 論文集 Vol.23 No.-
본 논문에서 Temporal Logic Framework과 Petri Net에 의한 이산사건 시스템의 모델링 및 분석을 다루었다. Petri Net의 reachability tree는 이산사건 시스템의 safeness, boundedness, conservation 그로고 coverability 문제를 해결하기 위해 사용할 수 있다. 그러나, Petri net 의 reachbilit tree는 reachability 와 liveness 문제를 완전하게 해결할 수는 없다. 본 논문에서는 Temporal Logic Framework 과 Petri Net의 합성에 의한 방법을 제시하였다. 이 방법은 Temporal Logic Framework의 논리적 표현을 이용하여 Petri Net의 몇 가지 문제들을 하였다. In this paper, modeling and analysis of discrete event systems by temporal logic frame works ana petri net is considered. The reachability tree of the petri net .can be used to solve the safeness, boundedness, conservation and coverability problems of discrete event systems. But the reachability tree of the petri net do not solve reachability and liveness problems in general. We proposed a method that synthesised the petri net and the temporal logic frameworks. This method slove some problems of petri net by logical representation of temporal logic frameworks.
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IC 演算增幅器에 의한 아날로그컴퓨터의 開發에 대한 硏究
晋達福,姜英鎭,辛洪圭,黃炯秀 圓光大學校 1984 論文集 Vol.18 No.2
The main purpose of this paper is to propose a new method of making analog computer with 1C op amp instead of vacuum tube op amp. Making analong computer with 1C op amp is possible by making Integrator with 1C op amp. The Integrator was made by increasing the capacity of feedback capacitor C about five thousant times than that of vacuum tube integrator. By being able to make analog computer with 1C op amp. it is possible to make analog compuer smaller, cheaper and more precisely.
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김진권,이원혁,최정내,황형수 圓光大學校 大學院 1999 論文集 Vol.22 No.-
In this paper, we proposed the new controller reasoning mechanism for discrete event systems in a temporal logic framework. A sequence of event which drive the discrete event system form a given initial state to a given final state is generated by operating the plant. The most systems of DESs have a lot of execution path form the initial state to the final state. The framework also is a temporal logic model which is introduced to represent a production system. Structural similarities between a temporal logic model and a production system are shown and the state transition graph is built. A controller reasoning mechanism is given based on a forward reasoning procedure using uniformly distribution function. An example of blocks world is demonstrated to illustrate the novelty of the new approach.
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