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불확실성을 갖는 동적 시스템을 위한 퍼지모델 기반 제어기의 지능형 디지털 재설계
조광래,주영훈 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-
In this paper, we develop an intelligent digital redesign method for fuzzy-model-based controllers, effective for tracking control of nonlinear system which may also contain uncertainties. TS fuzzy model is adopted for fuzzy modeling of uncertain nonlinear systems. An extended parallel distributed compensation technique is then used to design a fuzzy-model-based controller for both stabilization and tracking. The designed continuous-time controller is then converted to an equivalent discrete-time controller by using an integrated intelligent digital redesign method.. TS fuzzy model for the representative a single link flexible joint robot system is constructed for the first time, and is used as an illustrative example to show the effectiveness and the feasibility of the developed design method.
조광래,이정한,김명훈,이원진,임세훈,이근무,기승희,김종한 대한마취통증의학회 2014 Anesthesia and pain medicine Vol.9 No.3
Background: Postoperative pain is the most common complaintof patients following laparoscopic cholecystectomy (LC). Intravenouslidocaine has analgesic, anti-hyperalgesic, and anti-inflammatoryeffects, and dexmedetomidine has anti-nociceptive and analgesicsparing effects. We evaluated the effects of perioperative intravenousinfusion of lidocaine and dexmedetomidine on postoperativepain control and analgesic consumption after LC. Methods: Eighty-four patients, aged 20–60 years, who wereundergoing elective LC were assigned randomly to three groups(n = 28 in each). The patients in group L received an intravenouslidocaine bolus of 1.5 mg/kg and then continuous infusion of 2mg/kg/hr. The group D received an intravenous dexmedetomidinebolus of 1 g/kg, followed by continuous infusion of 0.4 g/kg/hr. The group N received saline as described for group L. Bolus doseswere given during the 10 minutes before the induction of anesthesia,followed by continuous infusion until end of the surgery. Visualanalogue scale (VAS) score and postoperative analgesics consumptionwere evaluated during 24 hours after the surgery. Results: No significant difference was observed in VAS scoreamong the groups during the first 24 hr after LC. The amount offentanyl consumption in the post-anesthesia care unit wassignificantly less in groups L and D compared to group N. Conclusions: Both perioperative intravenous infusion of dexmedetomidineand lidocaine reduced postoperative requirements offentanyl in the early post-operative period after LC. However, therewas no significant difference between dexmedetomidine andlidocaine in the analgesic sparing effect.
Effect of pretreatment with palonosetron on withdrawal movement associated with rocuronium injection
조광래,이성헌,이원진,주병권,김명훈,임세훈,이건무 대한마취통증의학회 2014 Korean Journal of Anesthesiology Vol.66 No.1
Background: The main disadvantage of rocuronium is the pain associated with vascular injection. We evaluated the efficacy of palonosetron for reducing pain after rocuronium injection. Methods: Eighty patients scheduled for elective surgery were randomly divided into two groups: Group C (normal saline 1.5 ml, n = 40) and Group P (palonosetron 0.075 mg, n = 40). Anesthesia was induced with thiopental 5 mg/kg and the test drug was injected over 10 seconds. Thirty seconds after the injection of the test drug, rocuronium 0.6 mg/kg was injected over 30 seconds and the response was recorded. Injection pain was graded using a 4-point scale. The grade was 0 points for no movement, 1 point for wrist movement, 2 points for elbow or shoulder movement, and 3 points for whole body movement. Mean arterial pressure and heart rate were recorded on arrival in the operating room and before and 30 seconds after rocuronim injection. Results: There was no significant difference in the grade 1 response between the two groups; however, the grade 2 and 3 responses in Group P were 5 (12.5%) and 4 (10%), respectively, which were significantly lower than in Group C, with 13 (32.5%) responses for each grade. There were no significant differences in hemodynamic changes within each group. However, the difference in mean arterial pressure before and after the injection of rocuronium was significantly larger in Group C compared to Group P. Conclusions: Pretreatment with palonosetron 0.075 mg reduced the incidence and severity of withdrawal movement after rocuronium administration.
조광래,이진영,박성국,정순호,이군무,임세훈,이정한,김명훈,김현태,박정규 대한마취통증의학회 2012 Korean Journal of Anesthesiology Vol.63 No.4
Background: Reduction of intraoperative bleeding is necessary to achieve the ideal surgical field for the endoscopic sinus surgery (ESS). Intraoperative intra nasal bleeding is influenced by various anesthetics. This study compared surgical field condition between propofol/remifentanil (PR) based anesthesia and desflurane/remifentanil (DR) based anesthesia. Methods: American Society of Anesthesiologists physical status class I or II patients undergoing ESS were randomly assigned to group PR (n = 36) or group DR (n = 32). The extent of the preoperative surgical lesion was classified as high (> 12) and low (≤ 12) Lund-Mackay (LM) scores according to the computed tomography findings. The target mean blood pressure was maintained at 70-80 mmHg. Only one surgeon was involved in rating the visibility of the surgical field on a numeric rating scale (NRS) every 10 minutes. Results: There was a different surgical field grade from PR to DR. The mean (SD) surgical field score of NRS for the PR and DR was 2.3 (0.57) and 2.7 (0.67), respectively (P = 0.006). Especially in the high-LM score patients, the mean (SD) of surgical field score for the PR and DR was 2.4 (0.67) and 3.0 (0.63), respectively (P = 0.012). Conclusions: In the high-LM score patients, PR based anesthesia resulted in better surgical field condition for ESS than DR based anesthesia. In ESS, PR based anesthesia is considered to be helpful. Background: Reduction of intraoperative bleeding is necessary to achieve the ideal surgical field for the endoscopic sinus surgery (ESS). Intraoperative intra nasal bleeding is influenced by various anesthetics. This study compared surgical field condition between propofol/remifentanil (PR) based anesthesia and desflurane/remifentanil (DR) based anesthesia. Methods: American Society of Anesthesiologists physical status class I or II patients undergoing ESS were randomly assigned to group PR (n = 36) or group DR (n = 32). The extent of the preoperative surgical lesion was classified as high (> 12) and low (≤ 12) Lund-Mackay (LM) scores according to the computed tomography findings. The target mean blood pressure was maintained at 70-80 mmHg. Only one surgeon was involved in rating the visibility of the surgical field on a numeric rating scale (NRS) every 10 minutes. Results: There was a different surgical field grade from PR to DR. The mean (SD) surgical field score of NRS for the PR and DR was 2.3 (0.57) and 2.7 (0.67), respectively (P = 0.006). Especially in the high-LM score patients, the mean (SD) of surgical field score for the PR and DR was 2.4 (0.67) and 3.0 (0.63), respectively (P = 0.012). Conclusions: In the high-LM score patients, PR based anesthesia resulted in better surgical field condition for ESS than DR based anesthesia. In ESS, PR based anesthesia is considered to be helpful.