Same problem. I tried to install this rt: http://www.ubuntubuzz.com/2012/03/real-time-linux-installation-on-ubuntu.html.
Didn’t work.
FuzzyLite
The FuzzyLite Libraries for Fuzzy Logic Control
Fuzzy Logic Control was never this easy, simple, intuitive, beautiful, exciting,
and more importantly, completely based on free and open source technologies.