EVENTO
Nonlinear Tracking Control for Dual-Stage Actuator Systems
Tipo de evento: Seminário LNCC
This talk presents a nonlinear control method for dual-stage actuator (DSA) systems to track a step command input fast and accurately. Conventional tracking controllers for DSA systems were generally designed to enable the primary actuator to approach the setpoint without overshoot. However, we observe that this strategy is unable to achieve the minimal settling time when the setpoints are beyond the secondary actuator travel limit. To further reduce the settling time, we design the primary actuator controller to yield a closed-loop system with a small damping ratio for a fast rise time and certain allowable overshoot. Then, a composite nonlinear control law is designed for the secondary actuator to reduce the overshoot caused by the primary actuator as the system output approaches the setpoint. The proposed control method was applied to an actual DSA positioning system, which consists of a linear motor and a piezo actuator.
Data Início: 05/04/2007 Hora: 11:00 Data Fim: Hora: 12:00
Local: LNCC - Laboratório Nacional de Computação Ciêntifica - Sala de Reuniões da CSC - 1A56
Comitê Organizador: Minyue Fu - School of Electrical Engineering and Computer Science, The University of Newcastle - -
