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우주발사체 비행안전시스템을 위한 다중센서 융합필터 구현
류성숙(Seong-Sook Ryu),김정래(Jeongrae Kim),송용규(Yong-Kyu Song),고정환(Jeonghwan Ko),최규성(Kyu-Sung Choi) 한국항공우주학회 2009 韓國航空宇宙學會誌 Vol.37 No.2
우주발사체는 군용 미사일이나 과학로켓에 비해 크기가 크고 비행거리가 멀어 고장상황발생 시 매우 위험하다. 따라서 비행시험 시 사고의 위험을 최소화시키기 위해 비행안전시스템의 운용이 필수적으로 요구된다. 이 때, 비행안전시스템에 적용되는 추적 필터는 일반적인 필터와는 달리 필터의 정확성보다는 안정성이 우선 시 된다. 본 논문에서는 전 비행 구간에 걸쳐 안정적으로 비행 정보를 획득하기 위해서 다중센서를 이용하여 융합필터를 구성하였다. 추정된 위치 및 순간낙하점 오차를 분석하여 구현된 융합필터의 성능을 분석하였다. 또한 각 센서에 연결된 부필터에 고장검출 알고리듬을 적용함으로써 비정상 상태일 경우 융합에서 제외하여 전체 필터의 신뢰성을 유지하게 됨을 검증하였다. Threat due to malfunction of space launch vehicles is significant since it is bigger and flights longer range than military missiles or scientific rockets. It is necessary to implement a flight safety system to minimize the possible hazard. Design objective of the tracking filter for the flight safety system is different from conventional tracking filters since estimation reliability is more emphasized than estimation accuracy. In this paper, a fusion tracking filter was implemented for processing multi-sensor data from a space launch vehicle. The filter performance is evaluated by analyzing the error of the estimated position and instantaneous impact point. Also a fault detection algorithm is implemented to guarantee fusion filter's reliability under any sensor failure and verified to maintain stability successfully.
류성숙(Seong Sook Ryu),송용규(Yongkyu Song) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.1
In this paper, Recursive Least Squares (RLS) and Fourier Transform Regression (FTR) methods for estimating stability and control derivatives of small unmanned helicopter are evaluated together with MMLE technique. Flight data simulated by using a commercial small-scale helicopter model are exploited to estimate the parameters with accuracies for hover and cruise modes. The performances of the system identification methods are also compared by analyzing the responses of the reconstructed systems using estimated derivatives.
정유진,이영희,류성숙,신현정 한국중환자간호학회 2023 중환자간호학회지 Vol.16 No.1
Purpose : Intensive care unit (ICU) diaries have been implemented across the international ICU community. This study aimed to comprehend the meaning and nature of the lived experience of patients’ families using the ICU diary in Korea. Methods : This qualitative study adopted van Manen’s hermeneutic phenomenology. The participants comprised eight women and two men who were the family members of patients in the ICU for more than three days. Data were collected using in-depth interviews and observation from July 2018 to January 2019. Results : Patients’ families who experienced the ICU diary recognized it with six beings according to time: a good idea, forgotten stuff, burdensome work, touching service, my stuff, and a thing in the memory. The ICU diary had three essential meanings for the families: communication, solace and hope, and a record of life. These findings were rearranged according to van Manen’s fundamental existential, and the lived things and lived others were remarkably confirmed. Conclusion : Patients’ families experienced various ICU diary forms over time and recognized an ICU diary as a means of communication. Therefore, the ICU diary is expected to be used as an intervention between families and healthcare providers in the ICU to support mutual communication.
정주형 항생제치료에 대한 병원중심 가정간호서비스 효과분석 : 신장이식 후 CMV감염환자 대상으로
성영희,황문숙,류성숙,김성주 병원간호사회 2005 임상간호연구 Vol.10 No.2
Purpose: This study investigated the effect of hospital based home care nursing antibiotic treatment on the adequacy of treatments, amount of patient payment, patients' satisfaction and length of hospital stay. Method: A total of 22 patients(5 hospitalized, 6 home care nursing, and 11 mixed care) who were treated with only Ganciclovir for CMV infection following kidney transplant were analyzed in a comparative way. These subjects underwent kidney transplant at S. General Hospital in the year of 2003. The number of serum CMV antigen, "payment investigation table", and LOPSS to measure the adequacy of treatment, amount of patient payment and patient satisfaction. Data were analyzed with SPSS program by using descriptive statistics and Kruscal-wallis test. Result: Serum CMV antigen for all patients in 3 groups was negative and there was no significant difference among 3 groups in terms of complication(p=.592). The amount of patient payment in 3 groups was statistically different(p<.05). The patient in the home care nursing group paid significantly less amount than the others. There turned out to be no significant difference in patient satisfaction among 3 groups(p=.250). 4. Since the estimated revenue by reducing 165 days of LOS was approximately 51,092,085 won, there was a possibility to increase 106,828,905 won of revenue by expanding home care nursing to all inpatients who were admitted to the hospital by their own choices. Conclusion: This study proves the positive effect of hospital based home care nursing antibiotic treatment on the adequacy of treatment, amount of payment and satisfaction for CMV infected patients following kidney transplant. It is also proven to have a beneficial effect on the revenue of the institute.