Numerical Modeling of a Servohydraulic Testing System for Structures
Publication: Journal of Engineering Mechanics
Volume 127, Issue 8
Abstract
A realistic model of a dynamic testing laboratory for structures is presented, which includes the controller and the hydraulic loading equipment as well as the test specimen. The model provides a safe and easily controllable way of experimenting with a complex dynamic testing system, enabling the limits of the system to be explored prior to performing a physical test. The paper describes the representation of the proportional, integral, derivative, lag controller and the development of a detailed nonlinear model of the servovalve actuator system, together with their numerical implementation using the Matlab system-modeling package Simulink. Output from the model is compared with experimental results of both open-loop tests and real-time substructure tests, in which a physical test of part of a structure is coupled in real time to a numerical model of the remainder of the structure.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 127 • Issue 8 • August 2001
Pages: 816 - 827
History
Received: Oct 28, 1999
Published online: Aug 1, 2001
Published in print: Aug 2001
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