title: Assessment of damage in an eight-oscillator circuit using dynamical forcing.
abstract: We employ chaotic interrogation of a circuit simulation of a structure in order to test for damage to the structure. The circuit simulation provides a realistic test of our attractor-based method and permits close control over parameters in the structure. In this circuit, simulating an eight-degree-of-freedom spring-mass system, we were able to detect changes of as little as 2% in the coupling between two oscillators in the circuit. This corresponded to detection of a 2% loss in stiffness to one spring in the modeled system.
authors.affiliation: Naval Research Laboratory, Code 6340, Washington, D.C. 20375, USA. moniz@anvil.nrl.navy.mil
authors.forename: Linda
authors.initials: L
authors.lastname: Moniz
authors.forename: Thomas
authors.initials: T
authors.lastname: Carroll
authors.forename: Louis
authors.initials: L
authors.lastname: Pecora
authors.forename: Michael
authors.initials: M
authors.lastname: Todd