Feedforward control of acausal systems under broadband deterministic forcing

Pradeep K. Gudla; Venkata R. Sonti; Anindya Chatterjee

doi:10.1117/12.514896

14 October 2003 Feedforward control of acausal systems under broadband deterministic forcing

Pradeep K. Gudla, Venkata R. Sonti, Anindya Chatterjee

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514896
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

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.

Citation Download Citation

Pradeep K. Gudla, Venkata R. Sonti, and Anindya Chatterjee "Feedforward control of acausal systems under broadband deterministic forcing", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514896

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