15th Triennial World Congress of the International Federation of Automatic Control
  Barcelona, 21–26 July 2002 
DESIGN AND CONTROL OF HYDRAULIC ACTUATORS: SIMULATIONS AND EXPERIMENTAL RESULTS
Ana Lúcia D. Franco*, Edson R. De Pieri*,
Eugênio B. Castelan* and Raul Guenther**
* Departamento de Automaç ão e Sistemas
** Departamento de Engenharia Mecânica
Universidade Federal de Santa Catarina
88040-900 Florianópolis, SC, Brazil
E-mails: analucia@das.ufsc.br, edson@das.ufsc.br,
eugenio@das.ufsc.br, guenther@emc.ufsc.br

In this paper the problem of experimental control of hydraulic actuators is considered. Experimental results of a backstepping implementation are analyzed in the context of practical difficulties, mainly the measurements of the acceleration and pressure difference. A two degree-of-freedom controller is proposed to circumvent these difficulties in a framework that takes into account the measurement and the robustness problems. Simulations results illustrate the main features of the backstepping and the two degree-of-freedom controllers when applied on a hydraulic actuator.
Keywords: Hydraulic Actuators, Nonlinear Control, Linear Control, Robustness, Disturbance Rejection
Session slot T-Tu-A16: Controller Design Studies (Aeronautics and Hydraulics)/Area code 2a : Control Design