This paper deals with a novel adaptive observer-based technique for estimating the amplitude, frequency and phase of a single sinusoidal signal from a measurement affected by structured and unstructured disturbances. The structured disturbances are modelled as a time-polynomial so as to represent bias and drift phenomena typically present in applications, whereas the unstructured disturbances are modelled as bounded noise signals. The proposed estimation technique exploits a specific adaptive observer scheme equipped with a switching criterion allowing to properly address in a stable way poor excitation scenarios. The estimator's stability properties are analyzed by Input-to-State Stability arguments. The practical characteristics of the proposed estimation approach are evaluated and compared with other existing tools by extensive simulation trials. Real experimental results are provided as well.

An Adaptive Observer-based Switched Methodology for the Identification of a Perturbed Sinusoidal Signal: Theory and Experiments

PIN, GILBERTO;PARISINI, Thomas
2014-01-01

Abstract

This paper deals with a novel adaptive observer-based technique for estimating the amplitude, frequency and phase of a single sinusoidal signal from a measurement affected by structured and unstructured disturbances. The structured disturbances are modelled as a time-polynomial so as to represent bias and drift phenomena typically present in applications, whereas the unstructured disturbances are modelled as bounded noise signals. The proposed estimation technique exploits a specific adaptive observer scheme equipped with a switching criterion allowing to properly address in a stable way poor excitation scenarios. The estimator's stability properties are analyzed by Input-to-State Stability arguments. The practical characteristics of the proposed estimation approach are evaluated and compared with other existing tools by extensive simulation trials. Real experimental results are provided as well.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2808536
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