Effect of model error on actuator and damper placement for structural control

Eric H. Anderson; Nesbitt W. Hagood

doi:10.1117/12.152804

8 September 1993 Effect of model error on actuator and damper placement for structural control

Eric H. Anderson, Nesbitt W. Hagood

Proceedings Volume 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems; (1993) https://doi.org/10.1117/12.152804
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

Abstract

Significant damping may be added to truss structures by replacing a small fraction of the members with passive or active damper struts. Although numerous methods for selecting the locations of dampers or actuators have been proposed, all rely on an accurate structural dynamic model. This paper demonstrates the effect of model error on placement when the objective is minimization of rms displacements. A group of placement algorithms is applied to a finite element model of a truss structure. The effect of adding between one and five viscous passive dampers or piezoelectric active struts in the member locations chosen is then demonstrated on the corresponding laboratory test article. Error in the analytical model leads to discrepancies between prediction and test. Predicted differences in achieved performance between simple and more complex placement algorithms are diminished. A specific pair of uncertain physical model parameters is proposed, and the resulting model error is explicitly included in a modified placement algorithm.

Citation Download Citation

Eric H. Anderson and Nesbitt W. Hagood "Effect of model error on actuator and damper placement for structural control", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); https://doi.org/10.1117/12.152804

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