% nomenclature, comment out the sections you do not use to supress the empty heading
\section*{Nomenclature}
\printacronyms[include-classes=abb, name=Abbreviations]
%\printacronyms[include-classes=ull, name=Upper-case Latin letters]
%\printacronyms[include-classes=lll, name=Lower-case Latin letters]
%\printacronyms[include-classes=ugl, name=Upper-case Greek letters]
%\printacronyms[include-classes=lgl, name=Lower-case Greek letters]