• 제어로봇시스템학회논문지
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• 제15권10호
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• pp.967-973
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• 2009

The model matching problem of asynchronous sequential machines is to design a corrective controller such that the stable-state behavior of the closed-loop system matches that of a prescribed model. In this paper, we address model matching when the external input set consists of controllable inputs and uncontrollable ones. Like in the frame of supervisory control of Discrete-Event Systems (DES), uncontrollable inputs cannot be disabled and must be transmitted to the plant without any change. We postulate necessary and sufficient conditions for the existence of a corrective controller that solves model matching despite the influence of uncontrollable events. Whenever a controller exists, the algorithm for its design is outlined. To illustrate the physical meaning of the proposed problem, the closed-loop system of an asynchronous machine with the proposed control scheme is implemented in VHDL code.

• 전자공학회논문지
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• 제53권7호
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• pp.103-109
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• 2016

비동기 순차 머신을 위한 교정 제어는 이미 설계된 비동기 순차 머신의 오동작이나 머신에서 발생하는 고장의 영향을 없애는 새로운 제어 기법이다. 본 논문에서는 비동기 순차 머신 교정 제어 시스템의 입력단에서 일어나는 고장을 탐지하고 극복하는 방법을 제안한다. 교정 제어기는 제어 대상 머신의 입력단에서 일어나는 고장을 탐지할 수 있으나 외부 입력단에서 발생하는 고장은 알지 못한다. 이번 연구에서는 비동기 순차 머신을 사용하는 외부 운용자(operator)가 상태 피드백을 받아서 고장을 발견한 후 제어기에게 고장 극복 동작을 명령하는 방식으로 외부 입력단의 고장을 위한 내고장성 제어 기법을 완성한다.

• 한방재활의학과학회지
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• 제21권4호
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• pp.205-217
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• 2011

Objectives: This study was conducted to identify the effects of the Daoyin and corrective exercise program on musculoskeletal pain among acute sprain patients due to traffic accidents. Methods: This study was carried out on the 35 patients who had been treated on musculoskeletal pain due to traffic accidents and was performed from March 1 to June 31, 2011 in the department of oriental rehabilitation medicine, Dun-San oriental hospital attached Dae-Jeon university. And we divided those 35 patients into 2 groups; sample group took treated with the Daoyin and corrective exercise program control group took common treatment only. All of the subjects were examined en visual analogue scale(VAS), state-trait anxiety inventory(STAI) score and presence of treatment after hospital discharge. The data was collected before and after the treatment, after hospital discharge. SPSS ver. 12.0 for Windows was used fer data analysis, and the analysis, and the general characteristics were demonstrated by frequency number and two-independent sample t-test. The effects of the Daoyin and corrective exercise program were analyzed by matched pair t-test and analysis of covariance. Results: On the VAS score, there was significant difference between before and after treatment, and before and after hospital discharge. And on the VAS scores, sample group mowed higher significant change of VAS than control group. And on the STAI score, there was significant difference between before and after treatment. But it did not show statistical significance between sample and control group. Conclusions: The Daoyin and corrective exercise program is an effective treatment fer musculoskeletal pain among acute sprain patients due to traffic accidents.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.783-786
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• 2000

For the development of a ultra-precision CMC polishing system including on-machine measurement system, we study a corrective polishing algorithm. We calculated unit removal profiles for various polishing tools and polishing tool positions. Using these results we simulate the corrective polishing process based on dwell time control. We calculate dwell time distributions and residual error of the polishing simulation method and the FFT calculation method. We got good dwell time distributions and small residual when we used the FFT calculation method. This results will be used for the optimization of corrective polishing process.

• 한국정밀공학회지
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• 제19권1호
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• pp.99-106
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• 2002

For the development of a ultra-precision CNC polishing system including on-machine measurement system, we study a corrective polishing algorithm. We calculated unit removal profiles for various flat type polishing tools and polishing tool positions. Using these results we simulate the corrective polishing process based on dwell time control. We calculate dwell time distributions and residual error of the polishing simulation method and the FFT calculation method. We test corrective polishing algorithm with an optical glass. The target removal shape is a sine wave that has amplitude 0.3 micro meters. We find this polishing process has a machining resolution of nanometer order and is effective for sub-micrometer order machining. This result will be used for the software development of the CNC polishing system.

• 한국데이터정보과학회:학술대회논문집
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• 한국데이터정보과학회 2006년도 추계 학술발표회 논문집
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• pp.97-112
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• 2006

FRACAS(Failure Reporting, Analysis and Corrective Action System) is intended to provide management visibility and control for reliability and maintainability improvement of hardware and associated software by timely and disciplined utilization of failure and maintenance data to generate and implement effective corrective actions to prevent failure recurrence and to simplify or reduce the maintenance tasks. This process applies to acquisition for the design, development, fabrication, test, and operation or military systems, equipment, and associated computer programs. This paper shows the FRACAS development process and developed FRACAS system for a defense equipment.

• 한국지능시스템학회논문지
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• 제26권2호
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• pp.135-140
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• 2016

비동기 순차 회로를 위한 교정 제어기는 회로를 재설계하지 않고도 회로 내에 존재하는 여러 고장을 탐지하고 극복하는 능력을 보인다. 이번 논문에서는 교정 제어기의 크기를 줄이기 위한 방법으로서 정적 교정 제어기(static corrective controller)를 제안한다. 동적 제어기에 비해 정적 제어기는 제어기 상태가 필요 없으므로 조합 회로(combinational circuit)만으로 구현 가능하다. 본 논문에서는 상태 천이 고장에 대한 정적 내고장성 교정 제어기가 존재할 조건과 설계 과정을 규명한다. 또한 제안된 제어 기법을 FPGA로 구현된 SEU 오류 카운터에 적용하여 그 효용성을 실험적으로 검증한다.

• 한국전자통신학회논문지
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• 제17권3호
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• pp.399-408
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• 2022

본 논문에서는 기본 모드 원리를 침해하는 과도 고장이 존재하는 입력/출력 비동기 순차 회로의 내고장성 교정 제어 시스템을 제안한다. 비동기 순차 회로의 과도 천이 과정에서 발생하는 비-기본 모드 고장을 극복하기 위해서는 고장에 의한 상태 천이가 종료되는 시점을 알아야 하며, 회로를 고장 상태로부터 원래 도달해야 하는 상태와 출력 등가적인 상태로 보내기 위한 교정 동작을 구현해야 한다. 본 논문에서는 이러한 고장 탐지 및 극복을 구현할 수 있는 출력 피드백 교정 제어기의 존재 조건을 규명한다. FPGA 실험을 통해 제안된 제어 시스템의 설계 과정을 제시하고 응용 가능성을 검증한다.

• 디지털융복합연구
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• 제16권11호
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• pp.543-551
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• 2018

본 연구는 교정 운동이 전방머리자세 환자의 목뼈 정렬, 압력통증 역치, 통증에 미치는 영향에 대해 알아보았다. 대상자는 목 부위의 통증을 주로 호소하는 환자 중 전방머리자세로 판정되는 30명을 대상으로 연구를 실시하였다. 중재방법으로는 연구군은 등뼈 폄 운동, 네발기기 자세에서 뒤쪽락킹, 그리고 능동 목뼈 돌림 운동과 TECAR치료를 융합하였으며, 대조군은 등뼈 및 목뼈 교정운동만을 적용하였다. 평가는 목 척추 각도, 압력 통증 역치, 목장애지수, 시각적상사척도를 측정하였다. 중재는 2주간 주 6회 실시하였다. 연구결과 두 군 모두 목 척추각도, 압력통증 역치, 목장애 지수, 시각적상사척도에 유의한 차이를 나타내었다. 또한 목 척추각도를 제외한 압력통증역치, 목장애지수, 시각적상사척도에 연구군이 대조군 보다 유의하게 개선되었다. 이러한 결과는 교정 운동과 TECAR 치료를 융합하는 중재 방법이 전방머리자세 환자의 머리 정렬과 통증 및 일상생활능력에 보다 긍정적인 영향을 미친다고 사료된다.

• 말소리와 음성과학
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• 제6권4호
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• pp.151-159
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• 2014

The study investigated the effects of reading intervention to enhance reading fluency for children from low-income families. The participants were 20 children from low-income families who are in grades 1 to 3. To qualify for participation in this study, all children had to score below 30 % ile on the Receptive vocabulary Test of the Expressive and Receptive Vocabulary Test or the Word reading fluency of the Korean Language-Based Reading Assessment. Participants were randomly assigned to the intervention (n=10) or control (n=10) group. The intervention group participated in the individualized intervention program using the guided repeated reading and the corrective feedback strategies. The results showed that participants in the intervention group performed better on reading fluency than those in the control group after participating in the intervention program. Specifically, guided repeated reading with corrective feedback strategies produced significant improvement on generalization to unpracticed passages as well as practiced passages. The results of this study suggest that guided repeated reading with corrective feedback is effective for enhancing reading fluency for children in Korea. Further study is needed in order to develop language-specific reading intervention.