Identification of Frequency Response Function of Shaking Table with a New Estimator

Abstract:

Shaking table is a nonlinear system, which is a more nonlinear system with payload. System can be usually as linear system nearby working point in control strategy. 1 H -estimator or 2 H -estimator is used for identifying the Frequency Response Function (FRF) of the system. 1 H -estimator is a lower-estimator and 2 H -estimator is an over-estimator, both have large estimating errors. In this paper, a new estimator, m H -estimator, is used for the identification of the shaking table system’s FRF, and whose parameters are estimated by differential evolution (DE) which makes m H closed to the true FRF H . This control strategy can reduce the steps of iterative learning control (ILC) of shaking table system, and the affection of payload characteristic.

• Periodical: Applied Mechanics and Materials (Volumes 44-47)
• Pages: 719-723
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.44-47.719
• Online since: December 2010
• Authors: Jian Qiu Chen, Ping Tan
• Keywords: Differential Evolution (DE), Frequency Response Function (FRF), Shaking Table, System Identification

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