Fractional Describing Function Analysis of PWPF Modulator

الملخص EN

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.