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박욱제,황명신,송용규 한국항공대학교 1998 論文集 Vol.36 No.-
To obtain aircraft dynamic parameters, various estimation methods such as Maximum Likelihood, Linear Regression are applied. In this paper we adopt the extended Kalman filter(EKF) to estimate the stability and control derivatives in aircraft dynamic models from flight test data. The extended Kalman filter is applied to nonlinear augmented system assuming that unknown parameters are additional states. In this work, the results of the extended Kalman filter are compared with those of the wind tunnel test and Modified Maximum Likelihood Estimation(MMLE) using ChangGong-91 aircraft flight test data.
신경망을 이용한 분사식 가솔린 기관의 상태변수 추정 및 공연비
송인범,송용규 한국 항공대학교 항공산업기술연구소 1997 航空宇宙産業技術硏究所 硏究誌 Vol.7 No.-
Neural network techniques are applied to the air-to-fuel ratio control of automotive fuel-injection systems. Since the dynamics of internal combustion engines and fuel-injection systems are extremly nonlinear, the design of standard production controllers relies heavily upon calibration and look-up tables. A neural network-type controller is developed in this article exploiting its function-approximation and learning capabilities. A discrete engine model-based A/ f ratio control system using state-space and estimation methods is presented. An excellent match of the A/F ratio with the desired A/F ratio is achieved despite of the parameter deviation from the nominal values. This result is obtained by compensating the air dynamics with a drive-by-wire throttle and fuel dynamics with a neural network estimator-based feed-forward controller.
담수 어류 혈청의 폴리펩타이드형 및 젖산 탈수소 효소 아이소 자임형에 관한 연구
宋容圭,李錦洙 충남대학교 자연과학연구소 1979 學術硏究誌 Vol.6 No.2
The serum proteins of sixteen different freshwater fish species which belong to seven different families were analyzed by polyaerylamide gel discontinuous electrophoresis. The polypeptide and LDH isozyme patterns were then examined on the basis of the phylogenetic relationship among species and the similarity of their life forms. 1. The polypeptide pattern of M,goreensisin Gobiobotiinae was similar to those of H.labeo, S.curriculus, and H.longirostris in Cyprininae which is belong to the same family, Cyprinidae. It suggests that the similarity of polypeptide pattern accords to the taxonomic classification. 2. The polypeptide pattern of P. asotus in Siluridae was similar to those of P,emarginatus and C.brevicorpus in Bagridae which have similar life forms. 3. The polypeptide pattern of A.iaponica in Anguillidae was similar to that of F.alba in Flutidae and that of P.emarginatus in Bagridae, They have similarity in their life forms. 4. The number of bands in the LDH isozyme pattern was always shown as 1, 2, 3, or 5, Since five bands are presented on the LDH isozyme patterns of P.herzi, and C.brevicorpus, the possible binomial distribution of two different polypeptide subunit in forming the LDH isozyme pattern still remains in the fish.