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Fractional Describing Function Analysis of PWPF Modulator

Author

Listed:
  • Xinsheng Wang
  • Danwei Wang
  • Senqiang Zhu
  • Eng Kee Poh

Abstract

Pulse-width pulse-frequency (PWPF) modulators are widely used in spacecraft thruster control. Their dynamic characteristic is still lack of effective analysis tools. This paper presents a fractional describing function method to describe the frequency characteristics of PWPF. A frequency-dependent gain and phase shift are clearly described by fractional-order expression, and the fractional-order behaviors depict the nonlinear properties of PWPF modulators. This fractional describing function method can also be applied to other kinds of modulators.

Suggested Citation

  • Xinsheng Wang & Danwei Wang & Senqiang Zhu & Eng Kee Poh, 2013. "Fractional Describing Function Analysis of PWPF Modulator," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-5, February.
    • Handle: RePEc:hin:jnlmpe:287040
    DOI: 10.1155/2013/287040
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