Continuous Pulse Control of Structures with Material Nonlinearity

Pantelides, Chris P.; Nelson, Paul A.; ,

Continuous Pulse Control of Structures with Material Nonlinearity

by Chris P. Pantelides, Univ of Utah, Salt Lake City, United States,
Paul A. Nelson, Univ of Utah, Salt Lake City, United States,

Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures

Abstract:

A control method is presented for reducing the dynamic response of structures in the inelastic material range using a control force from an active control system. The proposed method of continuous pulse control uses closed-loop feedback control as a combination of two algorithms. The first is the instantaneous optimal algorithm based on linear material behavior, and the second is pulse control which applies a corrective pulse when a prespecified structural displacement threshold is exceeded. Results of the analysis are compared to both a nonoptimal pulse algorithm and an instantaneous nonlinear optimal algorithm. Comparisons between continuous pulse and nonoptimal pulse control for seismic structures in the inelastic range show that the continuous pulse control uses less control energy and reduces the response better than the nonoptimal pulse control. Comparisons between the continuous pulse and instantaneous nonlinear optimal algorithm show that the continuous pulse uses a larger control force but is more effective than the optimal algorithm, in the sense that it can reduce the response of a given structure to any probable earthquake. The optimal algorithm is more effective than the continuous pulse for a single specific earthquake but is not as effective for other earthquakes which may occur in the life of the structure.

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