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

作者：Chen Boli^*; Pin Gilberto; Ng Wai M; Lee Chi K; Hui S Y Ron; Parisini Thomas

来源：IEEE Transactions on Signal Processing, 2014, 62(24): 6355-6365.

DOI：10.1109/TSP.2014.2362105

• Frequency estimation
• adaptive estimation
• observers
• adaptive signal processing

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%26apos;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.

• 出版日期2014-12-15