Active Control of Flexible Structures

Beschreibung

Active Control of Flexible Structures deals with vibration control for large-scale flexible structures which are, or may be, subject to a broadband primary vibration field. The authors present a complete rationale for solving problems of vibration, from experimental structural characterization to controller implementation. In reaching this objective they address the following steps:• experimental identification of the dynamic model of the structure;• optimal placement of sensors and actuators;• formulation of control constraints in terms of controller frequency response shape, based on the specification and characteristics of sensors and actuators;• controller design and simulation; and• controller implementation and rapid prototyping.The experimental identification procedure is based on a gray-box approach tailored to the estimation of modal parameters of large-scale flexible structures. The actuator/sensor placement algorithm maximizes a modal controllability index so as to improve the effectiveness of the control action. Taking into account the physical limitations of sensors and actuators, the controller is chosen as a stable, band-pass MIMO system resulting from the closed-form solution of a robust control problem. The closed-form solution is particularly attractive for large-scale control systems, overcoming possible numerical problems caused by ill-conditioned solutions. Experimental results on an aeronautical stiffened skin panel are presented using rapid-prototyping hardware.Adaptive Control of Flexible Structures will be of interest to academics and practising engineers working on vibration-reduction problems in aerospace and other transportation environments; to civil engineers concerned with seismic vibration in buildings; and to graduate students taking courses in mechanical, aeronautical and control engineering, particularly when involved with smart structures andactuators. 
A complete solution for problems of vibration control in structures that may be subject to a broadband primary vibration field, this book addresses the following steps: experimental identification of the dynamic model of the structure; optimal placement of sensors and actuators; formulation of control constraints in terms of controller frequency response shape; controller design and simulation; and controller implementation and rapid prototyping. The identification procedure is a gray-box approach tailored to the estimation of modal parameters of large-scale flexible structures. The actuator/sensor placement algorithm maximizes a modal controllability index improving the effectiveness of the control. Considering limitations of sensors and actuators, the controller is chosen as a stable, band-pass MIMO system resulting from the closed-form solution of a robust control problem. Experimental results on an aeronautical stiffened skin panel are presented using rapid-prototyping hardware.
Shows the reader how to deal with not only vibration induced by distinct resonance peaks but also with those caused by broad-band disturbance Shows the reader how to test results quickly using rapid prototyping technology Relies on well-know robust optimal control strategies Includes supplementary material: sn.pub/extras

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Alberto Cavallo

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actuator adaptive control control engineering design identification mimo system modeling robust control simulation vibration

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