1. An Adaptive Observer-Based Switched Methodology for the Identification of a Perturbed Sinusoidal Signal: Theory and Experiments.
- Author
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Chen, Boli, Pin, Gilberto, Ng, Wai M., Lee, Chi K., Hui, S. Y. Ron, and Parisini, Thomas
- Subjects
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SIGNAL frequency estimation , *ADAPTIVE estimation (Statistics) , *ADAPTIVE signal processing , *SIGNAL processing , *INFORMATION measurement - 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 modeled 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. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
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