%0 Journal Article %A Marco Soares dos Santos and Jorge Augusto Ferreira and Camila Nicola Boeri and Fernando Neto da Silva %D 2010 %J International Journal of Mechanical and Mechatronics Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 47, 2010 %T Hybrid Fuzzy Selecting-Control-by- Range Controllers of a Servopneumatic Fatigue System %U https://publications.waset.org/pdf/69 %V 47 %X The present paper proposes high performance nonlinear force controllers for a servopneumatic real-time fatigue test machine. A CompactRIO® controller was used, being fully programmed using LabVIEW language. Fuzzy logic control algorithms were evaluated to tune the integral and derivative components in the development of hybrid controllers, namely a FLC P and a hybrid FLC PID real-time-based controllers. Their behaviours were described by using state diagrams. The main contribution is to ensure a smooth transition between control states, avoiding discrete transitions in controller outputs. Steady-state errors lower than 1.5 N were reached, without retuning the controllers. Good results were also obtained for sinusoidal tracking tasks from 1/¤Ç to 8/¤Ç Hz. %P 1240 - 1250