Implementation of Resonant Controllers and Filters in Fixed-Point Arithmetic
Harnefors, L.
Industrial Electronics, IEEE Transactions on
Volume 56, Issue 4, April 2009 Page(s):1273 - 1281
Digital Object Identifier   10.1109/TIE.2008.2008341
Summary:Resonant controllers and filters are useful in voltage-source-converter control systems. Although the trend is toward implementation in floating-point arithmetic, fixed-point arithmetic is still of interest, but requires much greater care in the algorithm design. This paper covers some important issues, namely, choice of structure, design formulas, scaling, sensitivity, quantization-noise amplification, and suppression of overflow limit cycles. The results presented should be particularly helpful as design guidelines to practical engineers in a situation where one often resorts to trial and error.

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