Robust Control and Active Vibration Suppression in Dynamics of Smart Systems

Abstract

Challenging issues arise in the design of control strategies for piezoelectric smart structures. Piezoelectric materials have been investigated for use in distributed parameter systems in order to provide active control efficiently and affordably. In the active control of dynamic systems, distributed sensors and actuators can be created using piezoelectric materials. The three fundamental issues that structural control engineers must face when creating robust control laws are structural modeling methodologies, uncertainty modeling, and robustness validation. These issues are reviewed in this article. A smart structure with piezoelectric (PZT) materials is investigated for its active vibration response under dynamic disturbance. Numerical modeling with finite elements is used to achieve that. The vibration for different model values is presented considering the uncertainty of the modeling. A vibration suppression was achieved with a robust controller and with a reduced order controller. Results are presented for the frequency domain and the state space domain. This work cleary demostrated the advantage of robust control in the vibration suppration of smart stuctures.

Smart Structures Innovations Using Robust Control Methods

“…The construction totally suppresses its vibration. In references [7][8][9][10]16], the same problem of the suppression of structure oscillation using piezoelectric materials is presented, but the displacement in none of these references is zero; that is, complete suppression of the oscillation is not achieved in any report. In addition, in no references is infinite control used to solve the specific problem.…”

“…The field of smart structures has seen a big increase in recent years [3][4][5][6]. In this work, an intelligent structure that has integrated actuators and sensors that are capable of damping the oscillations is presented [7][8][9][10]. Dynamic loads such as wind forces are applied and finite element analysis is performed [1,6,11,12].…”

Intelligent Structure Identification and Robust Control Implementation

“…Innovation is the application of robust control to suppress structural oscillations, which is a problem that has not yet been solved. This study applies robust control to smart structures [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. One of the main problems in engineering is the damping of structural oscillations, which can be caused by winds or earthquakes [5][6][7][8]16].…”

“…One of the main problems in engineering is the damping of structural oscillations, which can be caused by winds or earthquakes [5][6][7][8]16]. The application of the theory of control mentioned in the reports is a problem that still concerns engineers, and an attempt is being made to introduce it into structures stressed by dynamic loads, such as airplane wings, bridges, and tall buildings [5][6][7][8][9][10][11][12][13][14][15].…”

“…In structural engineering, this may involve Active Control Systems [5,[7][8][9]16,17]. These include active mass dampers and tunable vibration absorbers that can adapt to changing conditions to mitigate undesirable vibrations [5,[8][9][10][11][12][13][14][15]18].…”