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SynRM 드라이브의 최대토크제어를 위한 Hybrid-FNPI 제어기 개발
강성준(Sung-Joon Kang),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),백정우(Jung-Woo Baek),장미금(Mi-Geum Jang),문주희(Ju-Hui Mun),정철호(Chul-Ho Jung),정동화(Dong-Hwa Chung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper proposes maximum torque control of SynRM drive using hybrid fuzzy neural network PI(Hybrid-FNPI) controller. The control method is applicable over the entire speed range and considered the limits of the inverter's current and voltage rated value. For each control mode. a condition that determines the optimal axis current for maximum torque operation is derived. The proposed control algorithm is applied to SynRM drive system controlled Hybrid-FNPI controller and the operating characteristics controlled by maximum torque control are examined in detail.
신경회로망에 의한 철손을 고려한 SynRM의 새로운 효율 최적화 제어
강성준(Sung-Joon Kang),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),백정우(Jung-Woo Baek),장미금(Mi-Geum Jang),정동화(Dong-Hwa Chung) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Optimal efficiency control of synchronous reluctance motor(SynRM) is very important in the sense of energy saving and conservation of natural environment because the efficiency of the SynRM is generally lower than that of other types of AC motors. This paper is proposed a novel efficiency optimization control of SynRM considering iron loss using neural network(NN). The optimal current ratio between torque current and exciting current is analytically derived to drive SynRM at maximum efficiency. This paper is proposed an efficiency optimization control for the SynRM which minimizes the copper and iron losses. The design of the speed controller based on adaptive learning mechanism fuzzy-neural networks(ALM-FNN) controller that is implemented using fuzzy control and neural networks. The objective of the efficiency optimization control is to seek a combination of d and q-axis current components, which provides minimum losses at a certain operating point in steady state. The control performance of the proposed controller is evaluated by analysis for various operating conditions. Analysis results are presented to show the validity of the proposed algorithm.
강성준(Seong Joon Kang),김대성(Dae Sung Kim),김수용(soo Yong Kim),유수영(Soon Young Yoo),오진환(Jin Whan Oh),김기영(Kim Young Kim) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.1
Six neonates of gastric perforation between January 1986 and December 1989 were surgically treated. All perforations occurred within the first week of life. The most common symptom of the gastric perforation was sudden abdominal distention. Plain abdominal roentgenogram was most helpful to diagnose the gastric perforation. One of six patients had a round perforation thought to be stress ulcer in the pylorus and five had linear perforations, measuring 0.5~5 cm in length, in the greater curvature of the upper body. One of them had duodenal obstruction due to midgut volvulus and the other four had no definite etiology of the perforation. These five neonates except one with stress ulcer perforation showed similar histologic findings of muscular deletion in the surrounding gastric wall. Debridement and simple suture of the perforation was done in 5 patients and one had partial gastrectomy. The mortality occurred in two of six. Prematurity and low birth weight were significant factors of the mortality.
외상성 췌장 손상에서 수술적 치료와 역행성 경유두 췌관 삽입술의 유용성
유상범 ( Sang Bum Yoo ),조민수 ( Min Soo Cho ),배금석 ( Keum Seok Bae ),강성준 ( Sung Joon Kang ) 대한외상학회 2004 大韓外傷學會誌 Vol.17 No.2
Background: The presence of an injury to the pancreatic duct system is the most important determinant of the morbidity and mortality associated with blunt pancreatic trauma. Endoscopic retrograde pancreatography provides detailed images of the pancreatic duct and clearly defines the nature of pancreatic duct injury. Compared with operative intervention, we evaluate the effectiveness of endoscopic placement of transpapillary stent in pancreatic trauma. Patients and Methods: Thirteen patient with pancreas injury from April, 1992 to December 2002 were included in this study. We classified patients according to the treatment method, such as operative intervention or endoscopic placement of transpapillary stent. And demographic information, mode of injury, imaging studies, initial serum amylase, hospital stay and complication were retrospectively reviewed. Results: Eight patients were treated by operative intervention, and another five by endoscopic placement of transpapillary stent. In operative interventional group, mean hospital days were 50.8 days, pancreas specific complication developed in 5 of the 8 were as follws: pseudocyst, intestinal obstruction and enterocutaneous fistula. In endoscopic interventional group, mean hospital days were 31.2 days, pancreas specific complications were 2 cases of nonsymtomatic pseudocyst. Conclusion: Endoscopic placement of transpapillary stent is an alternative treatment in pancreatic injury.
문승상(Seung Sang Moon),강성준(Seong Joon Kang),김수용(Soo Yong Kim) 대한두경부종양학회 1992 대한두경부 종양학회지 Vol.8 No.2
Ten patients with Hurthle cell tumor of the thyroid gland from Dec. 1987 to Sep. 1992 were reviewed to delinate an acceptable policy of treatment. Patients varied from age 23 years to 66 and consisted of nine females and one male, most of whom had an asymptomatic solitary cold nodule. Four patients had benign neoplasm and six patients had malignant neoplasm proven by capsular or vascular invasion or nodal metastasis. Associated thyroid lesions occurred in five patients, three adenomatous goiter. one Graves' disease and one follicular cell carcinoma. Surgery consisting of lobectomy and isthmectomy in four patients. bilateral subtotal thyroidectomy in one patients, total thyroidectomy in five patients. Lymph node dissection was not performed. Only one patient was experienced transient hypocalcemia. The period of observation varied from 15 to 58 months(mean, 30.5 months). Although our case was small and short follow up period, there were no recurrences or deaths. We suggested early aggressive surgical approach was appropriate because of lower recurrence rate and fewer operation' high bilateralism, lower surgical complication.