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arXiv · 1405.7921

When is a Parameterized Controller Suitable for Adaptive Control?

Romeo Ortega·Elena Panteley
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Abstract

In this paper we investigate when a parameterized controller, designed for a plant depending on unknown parameters, admits a realization which is independent of the parameters. It is argued that adaptation is unnecessary for this class of parameterized controllers. We prove that standard model reference controllers (state and output--feedback) for linear time invariant systems with a filter at the plant input admit a parameter independent realization. Although the addition of such a filter is of questionable interest, our result formally, and unquestionably, establishes the deleterious effect of such a modification, which has been widely publicized in the control literature under the name L1-adaptive control.

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Romeo Ortega, Elena Panteley. 2014-05-30. When is a Parameterized Controller Suitable for Adaptive Control?. https://arxiv.org/abs/1405.7921

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