Hybrid distributed modal/wave sensors for structural control

Darryll J. Pines

doi:10.1117/12.239048

1 May 1996 Hybrid distributed modal/wave sensors for structural control

Darryll J. Pines

Proceedings Volume 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems; (1996) https://doi.org/10.1117/12.239048
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

Hybrid modal/wave distributed sensors and their application to active structural control are studied for one-dimensional structures. The unique spatial filtering properties of these convolving sensors are developed illustrating their direct benefit to solving the structural control problem. This work is motivated by problems encountered with structural control design methodologies using point sensors/actuators, including spillover, model uncertainty, non-causal compensators and sensor noise. Typical noncausal sensor dynamics such as gain rolloff without phase lag, are possible in real-time because of the spatially distributed nature of the sensor. In this paper a hybrid distributed sensor scheme is employed to exploit the spatial frequency properties of distributed piezofilm (PVDF) sensors to eliminate problems with control spillover and model uncertainty. At low frequency, a modal model is assumed to be valid while at high frequency, a wave model is assumed to be valid. This modeling is incorporated into a hybrid distributed sensor design that attempts to capture the relevant dynamics for structural control at low and high frequencies. Simulated control is attempted on a simple pinned-pinned beam.

Citation Download Citation

Darryll J. Pines "Hybrid distributed modal/wave sensors for structural control", Proc. SPIE 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems, (1 May 1996); https://doi.org/10.1117/12.239048

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