An Adaptive Notch Gain Using an Inverse Notch Filter and a Linear Prediction Filter

Abstract

This paper proposes an adaptive notch filter that automatically adjusts the notch frequency and notch gain, where they are the null frequency and the depth of the null, respectively. The proposed notch filter consists of an inverse notch filter and a linear prediction filter, and gives an appropriate filter gain which can eliminate a sinusoidal noise and extract only a wide-band signal even if they share the same frequency. We compare the capability of the proposed notch filter with traditional methods. Simulation results show that the proposed system improves the SNR in comparison to the conventional methods. C⃝ 2017 Wiley Periodicals, Inc. Electron Comm Jpn, 100(2): 58-67, 2017; Published online in Wiley Online Library (wileyonlinelibrary.com).

Quadcopter attitude control with vibration reduction by additive-state-decomposition dynamic inversion design with a notch filter

“…2 The structure of the proposed controller is simple. It is mainly composed of a (Proportional integral) PI term and a notch filter [15] term. The notch filter can suppress disturbances with a specific frequency.…”