Design of Adaptive notch filter
4.0
For frequency, and site value and phase are occurred changes of time-varying signal, existing since adapted stuck wave device (ANF) frequency estimated method exists signal frequency track accuracy and stability insufficient of problem, for proposed has a based on new errors function of ANF time-varying signal frequency track method, through new errors function improved since adapted algorithm convergence to optimal frequency solutions of precision and speed, to improve time-varying signal frequency track of accuracy and stability. New error function analysis results are presented and new method steps and ANF Cramer-Rao lower limit of the frequency estimation method. Through the training and the whole existing ANF method of frequency tracking for time-varying signals compares the performance, and Coriolis mass flow and training conducted field experiments of a time-varying signal. Results show that the method is convergence, tracing lower, closer to the Cramer-Rao and the advantage of