Assessment of damage in an eight-oscillator circuit using dynamical forcing.
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.
Moniz
Linda
L
Naval Research Laboratory, Code 6340, Washington, D.C. 20375, USA. moniz@anvil.nrl.navy.mil
Carroll
Thomas
T
Pecora
Louis
L
Todd
Michael
M