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.Full text not available from this repository. (Request a copy)
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|
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