Fractional Describing Function Analysis of PWPF Modulator

Xinsheng Wang, Danwei Wang, Senqiang Zhu and Eng Kee Poh

Mathematical Problems in Engineering, 2013, vol. 2013, 1-5

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.

Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:287040

DOI: 10.1155/2013/287040

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