칼만필터를 이용한 3상 PFC AC/DC 컨버터의 센서리스 제어

박준성,권영안,Park, Jun-Sung,Kwon, Young-Ahn 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.5

3상 PWM 컨버터는 입력 전류를 정현적으로 제어할 수 있어 입력 전류의 고조파 성분을 감소시킬 수 있고 입력 전압에 대하여 입력 전류의 위상을 제어할 수 있다. 본 논문은 3상 PWM 컨버터의 역률개선을 위하여 전원전압센서를 사용하지 않고 가상자속기반 벡터제어를 적용한 새로운 센서리스 제어방식을 연구하였다. 직류출력전압은 칼만 필터를 적용하여 추정한 가상자속에 의해 제어되며, 동기위상은 추정된 가상자속을 이용하여 위상을 얻는다. 제시한 PFC 알고리즘은 역률개선 및 가변영역에서 직류출력전압, 부하변동에서 직류출력전압을 정밀하게 제어할 수 있는 우수성을 가진다. 본 논문에서 제안한 가상자속추정 알고리즘을 적용한 칼만 필터 성능은 실험과 시뮬레이션을 통해서 검증하였다. This paper investigates a new sensorless control appling a virtual flux oriented vector control without the line voltage sensor for the power factor correction of 3 phase PWM converter. The DC output voltage is controlled by applying the kalman filter algorithm for the virtual flux estimation and the synchronous phase is obtained by using the estimated virtual flux equation based on kalman filter. This method is used to reduce the calculation time of the system and obtain a stable control that the input current including the harmonics and the noise is improved. The proposed system implement PFC algorithm in the variable region of DC output voltage. It can obtain the unity power factor, and can precisely control the DC output voltage in the load variation and in the variable voltage range. The performance of the proposed algorithm is verified through simulation and experiment.

근시에서의 라섹과 TransPRK라섹 수술 후 고위수차 비교

박준성,Park, Jun-Sung 한국임상보건과학회 2015 한국임상보건과학회지 Vol.3 No.2

Purpose: The aim of this study is to compare total high order aberrations between surgery which uses TransPRK and general laser assisted sub-epithelial keratomileusis. Methods: The patients who had general laser assisted sub-epithelial and TransPRK laser assisted sub-epithelial by visiting ophthalmic clinic in Ulsan from January 2014 to August 2014 was researched. Results: When comparing total high order aberrations before and after operation, it was found that total high order aberration in general laser assisted sub-epithelial group increased to $0.222{\pm}0.078{\mu}m$ from $0.074{\pm}0.019{\mu}m$ while that in TransPRK assisted sub-epithelial group increased to $0.179{\pm}0.045{\mu}m$ from $0.076{\pm}0.032{\mu}m$. When comparing the increment in total high order aberrations between two groups after surgery, it was found that the increments of TransPRK assisted sub-epithelial group were statistically smaller than that of general laser assisted sub-epithelial group (p<0.05). Conclusions: This study made a comparative analysis of total high order aberrations between general laser assisted sub-epithelial and TransPRK assisted sub-epithelial which was introduced recently and the result showed a significant difference. The findings of this study suggest that TransPRK assisted sub-epithelial can be used widely in simply improving eye sight and quality of vision by reducing an increase in high order aberration caused by orthokeratology surgery. It is expected that TransPRK assisted sub-epithelial will be helpful for improving the understanding quality of eye sight which occurs by several methods of vision correction surgery.

삼성의 벽식 구조 복합화 공법

박준성,김연경,Park, Joon-Sung,Kim, Yeon-Kyeong 한국건축시공학회 2002 한국건축시공학회지 Vol.2 No.2

"Samsung Composite Shear Wall System" has its basis on "Samung Able System". "Samsung Able System" has some problems not only in the connection structure but also in waterproofing and soundproofing. We developed "Samsung Composite Shear Wall System" in order to solve these matters and expand PC system. "Samsung Composite Shear Wall System" is the compromise and complement of all the merits of full PC, half PC and in-situ concrete system.

특허법 개정안 공청회 - PLT 도입에 의한 특허법 개정에 대해

박준성,Park, Jun-Seong 한국발명진흥회 2011 發明特許 Vol.36 No.1

교수 연봉제의 설계 방안과 전망

박준성,Park, Jun-Seong 한국대학교육협의회 1998 大學敎育 Vol.94 No.-

연봉제가 적용된다는 것은 교수 사회에 명실상부한 경쟁 메커니즘이 형성되게 된다는 것을 의미한다. 논란의 여지가 있을 수 있지만, 사회 전반에 걸쳐 경쟁 메커니즘의 적용 폭을 넓혀야 할 처지에서 대학만 예외가 될 수는 없다. 경쟁 메커니즘의 적용으로 교수의 교육 열의가 높아지고 연구실적이 향상되는 순기능만이 아니라, 공동체를 유지하는 협력을 깨뜨리고 부정적인 갈등을 증폭시키는 역기능을 촉발할 수도 있다. 따라서 연봉제와 같은 이해복합적인 사항은 실시에 앞서 충분한 준비와 전문적인 검토를 필요로 한다.

무작위 대조 시험을 통한 족관절 염좌의 자침 중 심자와 천자의 비교 연구-준비 조사

박준성,김우영,백승태,이승덕,김갑성,Park, Jun-sung,Kim, Woo-young,Baek, Seung-tae,Lee, Seung-deok,Kim, Kap-sung 대한침구의학회 2004 대한침구의학회지 Vol.21 No.5

Objective : The aim of the study was to compare the therapeutic effect of the superficial and in-depth insertion of acupuncture needles in the treatment of patients with ankle sprain. Design : A prospective randomized single-blind study of superficial and deep acupuncture was conducted. Setting : The study was conducted in the Kang-nam Oriental Hosp. of Dong-Guk University. Patients: The study comprised 14 patients with ankle sprain who were divided into two groups (A and B). Intervention : In group A, the needle was introduced in the skin at a depth of 2 mm, whereas in group B the needle was placed deeply into muscular tissue or the articular capsule at a depth more than 1.5 Cm The treatment was planned for a duration of 1 week, 3 times. Outcome Measures : The intensity of pain was evaluated with the Ankle grade pain chart(AGPC) before and after treatment and at the 1-week follow-up examination. The AGPC includes Swelling, Tenderness, Exudation, Bruise, Medial/Lateral. stability test, Anterior drawer test, Squeeze test, Bearing weight, Pressure Algometer, Walking state and VAS. Results : Although at the end of the treatment there was no evidence of significant statistical differences between the two different groups, Pain reduction(VAS) was greater in the group treated with deep acupuncture. A statistical difference existed between the two groups at the 1 week follow up, with a better result in the deeply stimulated group in VAS. Conclusion : Clinical results show that deep stimulation has a better analgesic effect when compared with superficial stimulation in pain reduction(VAS, Visual analogic scale).

4 방향 윤곽선 추적과 K-Means 알고리즘을 이용한 색조 도플러 초음파 영상에서 상환 동맥의 혈류 영역 추출

박준성,김광백,Park, Joonsung,Kim, Kwang Baek 한국정보통신학회 2020 한국정보통신학회논문지 Vol.24 No.11

본 논문에서는 색조 도플러 초음파 영상에서 K-Means 알고리즘을 적용하여 혈류 영역을 추출하는 방법을 제안한다. 제안된 방법에서는 ROI 영역을 추출하고, 추출된 ROI 영역에서 최대 명암도를 임계치로 설정한 이진화 기법을 적용하여 ROI 영역을 이진화한다. 이진화된 ROI 영역에서 4 방향 윤곽선 추적 기법을 적용하여 상완 동맥의 혈류 영역이 존재하는 사다리꼴 형태의 영역을 추출한다. 추출된 사다리꼴 형태의 영역에서 상완동맥의 혈류영역을 정확히 추출하기 위하여 K-Means 기반 양자화 기법을 적용한다. 실험에서 제안 된 방법은 현장 전문가의 검증을 거쳐 30건 중 28건 (93.3%)에서 혈류 영역을 성공적으로 추출하였다. 그리고 제안된 K-Means 기반 혈류 영역 추출 방법을 30개의 색조 도플러 초음파 영상에 적용하여 전문의가 제공한 상완동맥 혈류 영역과 제안된 방법을 비교 분석한 결과, 정확도가 평균적으로 94.27%로 나타났다. In this paper, we propose a method of extraction analysis of blood flow area on color doppler ultrasonography by using 4-directional contour tracking and K-Means algorithm. In the proposed method, ROI is extracted and a binarization method with maximum contrast as a threshold is applied to the extracted ROI. 4-directional contour algorithm is applied to extract the trapezoid shaped region which has blood flow area of brachial artery from the binarized ROI. K-Means based quantization is then applied to accurately extract the blood flow area of brachial artery from the trapezoid shaped region. In experiment, the proposed method successfully extracts the target area in 28 out of 30 cases (93.3%) with field expert's verification. And comparison analysis of proposed K-Means based blood flow area extraction on 30 color doppler ultrasonography and brachial artery blood flow ultrasonography provided by a specialist yielded a result of 94.27% accuracy on average.

족관절 외측 인대 봉합 후 실패의 위험 인자

박준성,김범수,Park, Jun Sung,Kim, Bom Soo 대한족부족관절학회 2016 대한족부족관절학회지 Vol.20 No.2

A modified $Brostr{\ddot{o}}m$ procedure has been widely accepted as a treatment of choice for patients with chronic lateral ankle instability. The procedure is highly reliable and provides successful outcomes in approximately 90% of cases. Severe degree of instability, absence or poor quality of the ligamentous remnant, obesity, and generalized joint hypermobility have been regarded as poor prognostic factors related to the modified $Brostr{\ddot{o}}m$ procedure. However, these perceptions are based on a low level of evidence studies or expert opinions. Therefore, the aim of this article was to search for evidences regarding the poor prognostic factors of the modified $Brostr{\ddot{o}}m$ procedure.

녹용약침으로 치료한 De Quervain's Disease 4례 증례보고

박준성,김우영,백승태,이승덕,김갑성,Park, Jun-sung,Kim, Woo-young,Paek, Seung-tae,Lee, Seung-deok,Kim, Kap-sung 대한침구의학회 2004 대한침구의학회지 Vol.21 No.6

De Quervain's disease is caused by stenosing tenosynovitis of the first dorsal compartment of the wrist. The first dorsal compartment at the wrist includes the tendons of the abductor pollicis longus (APL) and the extensor pollicis brevis (EPB). Patients with De Quervain's usually report pain at the dorsolateral aspect of the wrist with referral of pain toward the thumb and/or lateral forearm. This condition responds well to nonsurgical treatment. Objective : The aim of this study was to find out the therapeutic effect of the Cervus elaphus Herbal-acupuncture in the treatment of patients with De Quervain's Disease. Design : A prospective study of Cervus elaphus Herbal-acupuncture was conducted. Setting : The study was conducted in the Kang-nam Oriental Hosp. of Dong-Guk University. Patients : The study comprised 4 patients with De Quervain's Disease. Methods : We investigated 4 cases patients the De Quervain's Disease. We evaluated wrist function that before and after Cervus elaphus Herbal-acupuncture treatment by VAS score, tenderness and Finkelstein test. the treatment is operated every other day. Results : Pain reduction(VAS) was found out in the case treated with Cervus elaphus Herbal-acupuncture. Conclusions : Clinical results show that Cervus elaphus Herbal-acupuncture has a good analgesic effect in De Quervain's Disease.

LED 조명과 특허 미국 특허 소송 대응을 중심으로

박준성,Park, Jun-Seong 한국발명진흥회 2010 發明特許 Vol.35 No.9