Abstract

본 논문은 궤적데이터마이닝의 2차 회귀분석 기법을 이용하여 나로우주센터 내 원격자료수신장비에서 우주발사체의 실시간 비행궤적을 보다 정확하게 추정하기 위한 방법을 제시하고 있다. 원격자료수신장비는 추적손실 없이 실시간으로 우주발사체의 비행위치와 상태정보를 수신하기 위한 정확한 위치추정 알고리즘이 필요하다. 따라서 나로호 1차 발사 시, 기존 보간법에 의한 원격자료수신장비 안테나의 거친 구동특성을 보완하고 안정적인 발사체의 위치추정을 위한 2차 회귀기법을 고려하였다. 성능분석을 위해 나로호 1차 비행시험데이터를 사용하였고, 수학적 모델링을 통해 실시간 발사체의 비행위치정보를 추정한 결과가 분석되었다. 분석결과, 궤적데이터마이닝의 2차 회귀기법을 적용한 위치추정알고리즘이 기존의 보간법에 의한 위치추정알고리즘보다 향상된 안테나 구동특성 및 추정정확도를 보였다. This paper is focused on how the trajectory of launch vehicle could be optimally estimated by the quadratic regression of trajectory data mining for the operation of telemetry ground system in NARO space center during real-time. To receive the telemetry data, the telemetry ground system has to track the space launch vehicle without tracking loss, and it is possible by the well-designed algorithm to estimate a flight position in real-time. For this reason, the quadratic regression model instead of interpolation was considered to estimate the exact position data of launch vehicle and the improvement of antenna performance. For analysis, the real trajectory data which had been logged during NARO 1st launch mission were used, the estimation result of launcher current position was analyzed by the mathematical modeling. In conclusion, the algorithm using quadratic regression based on trajectory data mining showed the better performance than previous interpolation algorithm to estimate the next flight position and the antenna driving performance.

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