Active Vibration Suppression of a Smart Flexible Beam Using a Sliding Mode Based Controller
- 18 August 2007
- journal article
- research article
- Published by SAGE Publications in Journal of Vibration and Control
- Vol. 13 (8), 1095-1107
- https://doi.org/10.1177/1077546307078752
Abstract
This article investigates robust active vibration suppression of a flexible beam with a low dominant frequency using piezoceramic sensor and actuators. The piezoceramic sensor and actuators are in patch form and are surface-bonded to the cantilevered end of the flexible beam. The robust sliding mode control, which has the advantages of being robust to plant parameter variation, insensitive to the unmodeled dynamics, and easy to implement, is adopted in this article for active vibration control of the flexible beam. Unlike other commonly used vibration suppression methods, such as positive position feedback control, strain rate feedback control, and lead compensation, the sliding mode controller requires almost no knowledge of the flexible beam. To avoid the chattering problem commonly associated with sliding mode control, a smooth switching function employing a hyperbolic tangent function is used. A low pass filter is applied to the output of the sliding mode controller to avoid excitation of the higher modes of the flexible beam. To demonstrate the advantage of sliding mode based active vibration reduction, its experimental results are compared with those of Proportional plus Derivative (PD) control and lead compensation. The comparison shows that the sliding mode controller reduces vibration of the flexible beam much more rapidly. To verify the robustness of the proposed sliding mode controller, vibration suppression of the beam is conducted for a case where the modal frequency of the beam is changed by adding masses. In addition, vibration suppression of the beam when subjected to a multi-modal excitation is also conducted. Experimental results demonstrate the robustness of the proposed controller with respect to varying model parameters and even the dynamics of higher modes.Keywords
This publication has 10 references indexed in Scilit:
- CONSTRUCTION OF AN ACTIVE SUSPENSION SYSTEM OF A QUARTER CAR MODEL USING THE CONCEPT OF SLIDING MODE CONTROLJournal of Sound and Vibration, 2001
- Sliding mode control of a large flexible space structureControl Engineering Practice, 2000
- Active vibration suppression of a flexible structure using smart material and a modular control patchProceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2000
- Piezo actuators for active vibration control and isolation—principles and practical experiencesThe Journal of the Acoustical Society of America, 1999
- A comparative study of conventional nonsmooth time-invariant and smooth time-varying robust compensatorsIEEE Transactions on Control Systems Technology, 1998
- Sliding mode control with compensator for wind and seismic response controlEarthquake Engineering & Structural Dynamics, 1997
- SLIDING MODE CONTROL OF BUILDINGS WITH ATMDEarthquake Engineering & Structural Dynamics, 1997
- Joint stick‐slip friction compensation of robot manipulators by using smooth robust controllersJournal of Robotic Systems, 1994
- Positive position feedback control for large space structuresAIAA Journal, 1990
- On the stability problem caused by finite actuator dynamics in the collocated control of large space structuresInternational Journal of Control, 1985