文章基本信息

标题：Frequency estimation of a sinusoidal signal with time-varying amplitude and phase ⁎
本地全文：下载
作者：Alexey A. Vedyakov ; Anastasiia O. Vediakova ; Alexey A. Bobtsov 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2018
卷号：51
期号：32
页码：663-668
DOI：10.1016/j.ifacol.2018.11.501
语种：English
出版社：Elsevier
摘要：AbstractThis paper is devoted to frequency estimation of a non-stationary sinusoidal signal. The amplitude is supposed to be a known function within a constant factor, the phase should be known. Example of such problem statement is sensorless angular velocity estimation for permanent magnet synchronous motors. On the first step by reparametrization, a third order linear regression model is obtained. On the next step, an estimation algorithm is constructed based on a standard gradient approach. The frequency estimate can be computed from one of the model parameters using inverse trigonometric functions. To improve estimates quality for noisy measurements we propose a new identification method, which can be tuned to attenuate the noise influence. It is shown that the frequency estimation error converges to zero exponentially fast. The described algorithm does not require measuring or calculating derivatives of the input signal. The efficiency of the proposed approach is demonstrated through the set of numerical simulations.
关键词：Keywordsonline frequency estimationcontinuous-time estimationa globally convergent estimator