전자공학회논문지SC (Journal of the Institute of Electronics Engineers of Korea SC)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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특이섭동 기법 기반 제어 시스템에 대한 샘플링 영향 분석 및 개선 - 특이섭동 기법 기반 STT 미사일 디지털 자동조정장치 설계에의 적용

Analysis and Improvement of Time Sampling effects on Singular Perturbation based Control Systems - Its Aplication to Design of Singular Pertubation based STT Missible Digital Autopilot

  • 정선태 (숭실대학교 정보통신전자공학부)
  • Jeong, Seon-Tae (Dept.of Information Communication Electronics Engineering, Soongsil University)
  • 발행 : 2000.05.01
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초록

특이섭동 기법을 이용한 제어 시스템의 설계가 가능하기 위해서는 무엇보다도, 빠른 동력학의 안정성이 중요하다. 그런데, 제어기의 디지털 구현으로 인하여, 이 빠른 동력학의 안정도가 영향을 받을 수 있다. 본 논문은 최근의 개발된 우수한 성능의 특이섭동 기반의 STT 자동조정장치(autopilot) 설계의 경우를 들어 이러한 특이섭동 기법에 기반하여 설계된 제어 시스템에 대한 샘플링 영향을 조사하고 개선된 제어기 설계의 예를 제시하여, 특이섭동 기반 제어 시스템 에 대한 샘플링 영향 분석의 필요성 및 유효성을 밝혔다.

The guarantee of the fast dynamics stability is essential for successful application of singular Perturbation technique to control systems design. Even though the fast dynamics of the control systems is rendered stable by an analog controller, the fast dynamics stability of the control systems resulted from an digital implementation of the analog controller can be impaired severely. In this paper, we first investigate the time sampling effects on singular perturbation based control systems by centering on a design example of recently developed singular perturbation based STT missile autopilot with high performance. The investigation shows that the stability margin the fast dynamics of the STT misile autopilot system decreases rapidly as the sampling interval of discretizing the analog autopilot increases. Under this analysis, we propose a composite digital controller with compensation for the decreasing stability margin of the fast dynamics due to time sampling to achieve better performance with respect to sampling time. The improved performance of the proposed composite digital controller is verified by simulation. This result shows that one needs to investigate time sampling effects in the digital implementation of singular perturbation based controllder, and then can have benefit from the investigation.

키워드

참고문헌

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