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저궤도 인공위성의 센서 및 구동기 통합 고장검출 및 분리 기법
임준규(Jun Kyu Lim),이준한(Junhan Lee),박찬국(Chan Gook Park) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.11
An integrated fault detection and isolation method is proposed in this paper. The main objective of this paper is development fault detection, isolation and diagnosis algorithm based on the DKF (Decentralized Kalman Filter) and the bank of IMM (Interacting Multiple Model) filters using penalty scalar for both partial and total faults and the outlier detection algorithm for preventing false alarm also included. The proposed FDI (Fault Detection and Isolation) scheme is developed in four phases. In the first phase, the outlier detection filter is designed to prevent false alarm as a pre-filter. In the second phases, two local filters and master filter are designed to detect sensor faults. In the third phases, the proposed FDI scheme checks sensor residual to isolate sensor faults and 11 EKFs actuator fault models are designed to detect wherever actuator faults occur. In the last phases, four filters are designed to identify the fault type which is either the total fault or partial fault. The developed scheme can deal with not only sensor and actuator faults, but also preventing false alarm. An important feature of the proposed FDI scheme can decreases fault isolation time and figure out not only fault detection and isolation but also fault type identification. To verify the proposed FDI algorithm performance, the Simulator is also developed under the Matlab/Simulink environment.
임준규(Jun Kyu Lim),박찬국(Chan Gook Park),이달호(Dal Ho Lee) 한국항공우주학회 2008 韓國航空宇宙學會誌 Vol.36 No.5
본 논문에서는 스칼라 필터와 적응 스칼라 필터의 성능을 비교 분석하였다. 외부 실험과 비슷한 실험 환경을 만들기 위해서 GPS를 대신할 수 있는 초음파 의사위성을 사용하였다. 적응 스칼라 필터는 스칼라 필터와는 달리 적응기법을 사용하여 연속적으로 속도오차 공분산과 측정잡음 공분산을 추정한다. 실험결과, 적응 기법을 사용하여 위의 두 파라미터를 연속적으로 추정하는 적응 스칼라 필터의 위치 추정 성능이 스칼라 필터보다 더 좋다는 것을 확인하였다. In this paper, the performance of a scalar filter and a scalar adaptive filter are analyzed. In order to make indoor experimental environment similar to outdoor test, ultrasonic sensors are used instead of GPS. The scalar adaptive filter, which is continuously estimating velocity error covariance and measurement noise covariance by using adaptive method, is different from the scalar filter. Experimental results show that the scalar adaptive filter has better position estimating performance than the scalar filter by estimating above two parameters with an adaptive method.
무인기의 항법을 위한 가속도를 고려한 적응 스칼라 필터
임준규(Jun Kyu Lim),박찬국(Chan Gook Park) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.1
This paper presents a novel scalar adaptive filter, which is reformulated by additional acceleration term. The filter continuously estimates three different kinds of covariance such as the measurement noise covariance, the velocity error covariance and the acceleration error covariance. For estimating three covariances, we use the innovation method for the measurement noise covariance and the least square method for other covariances. In order to verify the proposed filter performance compared with the conventional scalar adaptive filter, we make indoor experimental environment similar to outdoor test using the ultrasonic sensors instead of GPS. Experimental results show that the proposed filter has better position accuracy than the traditional scalar adaptive filter.
천공분지에 기저를 둔 도서형 회전 근막 피부 피판을 이용한 압박궤양의 치료
김지수,김동훈,이동락,임준규,Kim, Ji-Su,Kim, Dong-Hoon,Lee, Dong-Lark,Lim, Jun-Kyu 대한미세수술학회 2007 Archives of reconstructive microsurgery Vol.16 No.1
The reconstruction of deep soft tissue defect such as pressure sore has difficult problems. Myocutaneous flaps have been used commonly as the best coverage method for pressure sore. But, they have several drawbacks such as sacrifice of functional muscle, high morbidity of the donor sites and bulkiness at the recipient site. The concepts of perforator flap has recently developed and widely used to overcome these disadvantages. Between March 2005 to July 2006, we have treated 9 patients who had pressure sore using perforator based fasciocutaneous island rotation flap. Preoperative unidirectional Doppler was used in all cases. Mean number of perforator vessels was 3.8 and flap sizes were from $7{\times}5\;cm$ to $14{\times}13\;cm$. Rotation angles of flap were from 90 degree to 180 degree. In all cases, donor sites were closed primarily. All flap survived completely and postoperative complications were wound dehiscence in 1 case, wound infection in 3 cases. The mean postoperative follow up period was 15.7 months and recurrence was not reported. We could decrease donor site morbidity and cover wound sites easily by using flap rotation and get robust blood supply without sacrifice of functional muscle. Fasciocutaneous perforator island rotation flap would be very useful for various pressure sore treatment.
전창완,임준규 순천향대학교 부설 산업기술연구소 2005 순천향 산업기술연구소논문집 Vol.11 No.2
In these days, many battery-based systems like an electrical vehicle have appeared. Naturally, battery management system has been focused on an efficient management. The core of an efficient battery management system is battery modeling. In this paper, a model of Concode lead acid battery is constructed using Extended Kalman Filter. The constructed model is verified by experiments.
김명수,임준규 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-
This study is focused on collecting and analyzing varied RP/SP data including universal validity model of modal choice using preferred awareness data with Daejeon Metropolitan subway No. 2 targeted. In this way, it can implement the transport mode model, analyze application of these data, and especially predict the conversion demand form automobiles and buses into subway according to the change of charge and waiting time of the subway using SP survey in order to examine a practical application plan for demand prediction model. As a result of the study, the possibility of selecting a transport mode has been implemented using Logit model based on RP and SP data. Under SP condition, 51.17% of bus users and 51.97% of automobiles have turned out to converse into the subway revealing that there is little difference among current modes of transport. When considering the t value and symbolic conditions of +, - out of the model to consider the latent variable (the convenience of private transportation use and satisfaction from the transportation operating system), we may verify that the potential factors influence the selection of transportation means.