Online tuning method for notch filter depth in industrial servo systems

Review on Embedded Methods in Parameter Estimation and Auto-tuning of Permanent Magnet Synchronous Servo Machine Driven Industrial Systems

“…According to servo system complexity, there can be more than one disturbance such as low frequency vibrations, resonance, periodic oscillations etc., with different frequencies and amplitudes. Online adaptive notch filter (OANF), iterative tuning of notch filter and robust online adaptive notch filter (ROANF) versions are used to solve these problems [64]- [66]. The general structure of a notch filter in the embedded servo system and a 2 nd order specific notch filter design is given in Fig.…”

Natural Frequencies Identification by FEM Applied to a 2-DOF Planar Robot and Its Validation Using MUSIC Algorithm

“…During the last decade, robots, in particular those with servomotors, have gained momentum in diverse areas such as rehabilitation systems [ 1 , 2 , 3 ], human interaction systems [ 4 ], bio-inspired systems [ 5 , 6 , 7 , 8 ], and in surgery [ 9 ]. In general, their functionality depends on their performance trajectory; in this regard, an essential aspect to be considered in each programmed task is the value of the natural frequencies (NFs) of the robot, which can magnify the robot vibrations, affecting its performance [ 10 , 11 , 12 , 13 , 14 ]. Hence, it is of paramount importance to implement a method to accurately identify the NFs in order to obtain the best performance of the robot.…”

Performance analysis of adaptive notch filter active damping methods for grid-connected converters under a varying grid impedance

“…A discrete adaptive notch filter (ANF) has been proposed for active damping in [11], but the exact method of resonant frequency detection has not been specified. Reference [16] provides an online iterative tuning method for the ANF via modification of the damping ratios of the zeros. However, it is based on the assumption that the resonant frequency is already known.…”