Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

PWPF Parameters Design for Thruster Control

추력기 제어를 위한 PWPF 설계변수 설계

  • Received : 2017.05.30
  • Accepted : 2017.09.11
  • Published : 2017.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Usually, on/off control method is a way to control the thruster. Bang-Bang Control, PWM(Pulse Width Modulator) and PWPF(Pulse Width Pulse Frequency) are widely used as a typical way. When we are designing PWPF, the incorrectly designed parameters($K_m$, ${\tau}$, $U_{on}$, $U_{off}$, $U_m$) make trouble, such as the phase lag, the wasted fuel, the reduced system life. Therefore, the effect of parameters on the system performance should be analyzed before the proper parameters are selected. In this paper, we suggest the PWPF parameters design method by performing a static analysis, and analyze the interactive effects on design parameters by performing a dynamic analysis and simulation.

일반적으로 추력기는 on/off 제어 방식을 이용한다. Bang-Bang Control, PWM(Pulse Width Modulator), PWPF(Pulse Width Pulse Frequency) 등이 그 방법으로 많이 이용되고 있다. PWPF를 설계할 때 파라미터($K_m$, ${\tau}$, $U_{on}$, $U_{off}$, $U_m$)를 잘못 선정하면 위상 지연, 연료 낭비, 수명 감소 등이 발생한다. 그러므로 파라미터가 시스템 성능에 미치는 영향을 분석하고 적절한 파라미터를 선정하여야 한다. 본 논문은 정적 해석을 수행하여 PWPF 파라미터 설계방안을 제시하였으며, 동적 분석 및 시뮬레이션을 수행하여 설계변수에 미치는 상호 영향을 분석하였다.

Keywords

References

  1. Xu, X. and Cai, Y., "Pulse-Width Pulse-Frequency Based Optimal Controller Design for Kinetic Kill Vehicle Attitude Tracking Control," Scientific Research Applied Mathematics, Vol. 2, 2011, pp. 565-574.
  2. Krovel, T. D., "Optimal Tuning of PWPF Modulator for Attitude Control," M.S. Thesis, Norwegian University of Science and Technology, 2005.
  3. Rhee, S. W., Choi, H. T. and Kim, Z. C., "Thruster Loop Controller Design of Sun Mode and Maneuver Mode for KOMPSAT," Journal of The Korean Society for Aeronautical and space Sciences, Vol. 27, No. 2, 1999, pp.82-89.
  4. Choi, H. T., Seo, H. H. and Yong, K. L., "Thruster Loop Controller Design of Sun Mode and Maneuver Mode for LEO," Proceeding of The Korean Society for Aeronautical and Space Sciences Fall Conference, November 2008, pp. 1550-1553.
  5. Sidi, M. J., 1997, Spacecraft Dynamics and Control, Cambridge University Press, pp. 260-296.
  6. Wie, B., 1998, Space Vehicle Dynamics and Control, AIAA Education Series, pp. 478-482.
  7. Rhee, S. W., 2015, UST Spacecraft Dynamics and Control Lecture note.
  8. Kim, T. S. and Rhee, S. W., "Study on PWPF Parameters for Thruster Control," Proceeding of The Korean Society for Aeronautical and Space Sciences Fall Conference, November 2016, pp. 326-327.