Experimental sensor and actuator location procedure for control of dynamically complex smart structures

Steven Fulton Griffin; Keith K. Denoyer

doi:10.1117/12.316936

27 July 1998 Experimental sensor and actuator location procedure for control of dynamically complex smart structures

Proceedings Volume 3329, Smart Structures and Materials 1998: Smart Structures and Integrated Systems; (1998) https://doi.org/10.1117/12.316936
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

In choosing positions for sensors and actuators for structural control, the first step is usually to develop a model that describes the motion of the structure in response to an excitation. The next step depends on the type of sensors and actuators used. If displacement or acceleration sensors and shakers are used, the model serves as a guide to find locations on the structure where displacement is large for a given disturbance. If in-plane strain-based smart sensors and actuators are used, the model is used to identify locations with large in-plane strain. If the structure is relatively complex, there is a good chance that the initial model will not predict motion that agrees completely with the measured motion of the structure. This initial model is then typically adjusted so that the behavior it predicts agrees with a measured modal analysis of the structure. This process can be extremely time consuming, and while the reconciled modes often agree well with a modal analysis, there can be large errors with respect to in-plane strain. Prediction of in-plane is necessary for accurate location of smart sensors and actuators like piezoceramics. In this paper an experimental method is introduced which uses in-plane sensors to find good smart sensor and actuator locations to control acoustic excitation of a complex structure. Experimental results are also presented which demonstrate the proposed technique.

Citation Download Citation

Steven Fulton Griffin and Keith K. Denoyer "Experimental sensor and actuator location procedure for control of dynamically complex smart structures", Proc. SPIE 3329, Smart Structures and Materials 1998: Smart Structures and Integrated Systems, (27 July 1998); https://doi.org/10.1117/12.316936

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