http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
액체로켓엔진 Simulink 비선형 동적 모델에 적용하기 위한 Simulink Unscented Kalman Filter
김인성,정은환 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.11
Simulink로 작성된 가스발생기 사이클 액체로켓엔진 비선형 동적 모델을 이용하여 상태변수의 일부를 고려하는 localized unscented Kalman filter (LUKF)를 작성하고, 이를 이용하여 모델의 성능과 오류부분을 체계적으로 검토하여 모델 개선을 효과적으로 수행할 수 있다. 궁극적으로 측정결과를 이용하여 고장, 작동불능을 예측하고 그 원인이 되는 부위를 추정할 수 있으며, 시스템에서 측정하지 않거나 하지 못하는 상태를 파악할 수 있다. 이를 위한 기본 작업으로 단순한 van der pole 모델을 이용하여 비선형동적 모델에서 올바르게 작동하는 UKF를 simulink로 오류 없이 작성하였으며, 이 simulink UKF는 터보펌프-가스발생기 simulink 모델 (액체로켓엔진 비선형 동적 simulink에서 연소기를 오리피스로 간략화한 모델)을 이용한 LUKF에 적용하였다. We can analyze systematically a liquid rocket engine simulink nonlinear dynamic model and perform model updates effectively by using localized unscented Kalman filter (LUKF) where the model is implemented. Eventually, we can forecast failures and malfunctions of the system, identify the causes of them, and, estimate the unmeasured or unmeasurable states of the system. For the purpose of basic preparation for this big task, we made unscented Kalman filter (UKF) simulink program using simple Van der Pole oscillator model and showed it works properly. Then we applied the simulink UKF to the LUKF that uses Turbo pump-gas generator simulink model which is a liquid rocket engine simulink nonlinear dynamic model where combustion chamber is replaced with orifices.
김인성 圓光大學校 附設 體力科學硏究所 1992 體力科學硏究 Vol.14 No.-
The study is based upon the physique and physical fitness test of 762 adult male industrial workers. Classifying the workers into age-groups and working conditions. I have in this study induced the following conclusions; 1. Physique The highest points of standing height, body weight, and chest-girth fell upon age-groups of 25-29, 35-39, and 30-34 respectively. With the increase of age their measurements tend to slow down. The offics workers marked hjgher grades in standing height and body weight, the manufacturing workers marked the highest points in chest-girth. Compared with the workers of other conditions, the drivers got the lowest measurements in standing weight, body weight and chest girth. 2. Physique and Nutrition-index The highest relative body weight fell on the age group of 35-39 years. For the office workers, the 35-39 age group acquired the highest points. In the relative chest-girth and Kaup's index the age group of 40-44 years marked the highest points. The manufactures of 40-44 years attained the highest marks of 55.3±3.3, 2.41±0.28 respectively. Concerning the Vervaeck's index, the 35-39 age group marked the highest points. And the office workers of 35-39 years attained relatively higher points in the vervaeck's index than the other workers. 3. Physical Fitness The turning-point of increase in all the workers is revealed to be the age group of 20-24 years. The power and the endurance of muscle strength tend to rapidly weaken after the age of 30-34. And around after 35-39 years the worker's muscle strength and flexibility begin to slow down. The analysis by occupational classification shows the office workers mark the highest points in back strength, virtical jump, virtical jump, and trunk flexion and 30 sec, sit ups, while they attain the lowest in grip strengrh and floor push-up tests. And the manufacturing workers marked the higher points in the grip strength and floor push-up. The drivers attained the lowest marks in almost all tests except those of grip strength and floor push-up.
김인성 한국전기전자재료학회 2011 Transactions on Electrical and Electronic Material Vol.12 No.5
In this paper, the design area of a fabricated solar cell has been analyzed with respect to its charge density. The mathematical calculation used for charge-density derivation was obtained from the 2001 version of a ATHCAD program. The parameter range for the calculations was ±1 × 1017 cm-3, which is in the normal parameter range for n-type doping impurities (7.0 × 1017 cm-3) and also for p-type impurities (4.0 × 1017 cm-3). Therefore, it can be said that the fabricated solar-cell design area has a direct effect on charge-density changes.