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Feedforward control of acausal systems under broadband deterministic forcing

Gudla, Pradeep K and Sonti, Venkata R and Chatterjee, Anindya (2003) Feedforward control of acausal systems under broadband deterministic forcing. In: SPIE: Smart Materials, Structures, and Systems, 12-14 December, Bangalore, India, Vol.5062, 613-620.

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Abstract

We present some discrete-time perspectives on the active vibration control of a simple acausal system subjected to deterministic but broadband excitation. Here, exact vibration cancellation is not possible with bounded control forces. However, on penalizing high control forces using a weighting factor, we obtain a one parameter family of finite-time optimal feedforward (FTOF) controllers that substantially reduce vibration levels through bounded control forces. These controllers require knowledge of the future of the forcing, and are thus acausal. However, only a finite amount of the future needs to be known for practical purposes. These future values are predicted using a neural network. The FTOF controllers perform better than a direct application of the standard LMS algorithm. An LMS algorithm which uses several future values of the forcing performs better still. Some recommendations are made for practical applications.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to International Society for Optical Engineering.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 01 May 2007
Last Modified: 27 Aug 2008 12:42
URI: http://eprints.iisc.ernet.in/id/eprint/10208

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