E-031

Robust Active Control of Flexible Systems with Second Order Sliding

Authors: Alberto Cavallo, Giuseppe De Maria
Affiliation: Universita' degli Studi del Sannio Palazzo Bosco-Lucarelli, Piazza Roma, Benvento, 82100,Italy

Seconda Universita' degli Studi di Napoli Dipartimento di Ingegneria dell'Informazione via Roma 29, Aversa, 81031, Italy

Abstract
In this paper an active vibration controller for flexible systems is developed using a second order sliding manifold approach. Assuming narrow-band disturbances, the crucial point is to increase the damping of those system modes whose frequencies are close to the disturbance frequencies. The stable sliding surface consists of a time-invarying part which "eliminates" the selected modes without affecting the remaining dynamics, and a time-varying part which bounds the control amplitude in the transient. Moreover, the closed-loop system exhibits strong robustness properties typical of high-gain control systems, avoiding the peaking phenomenon that is one of the main drawback of the latter.

Alberto Cavallo
albcaval@unina.it