Open AccessRobust high bandwidth oscillation‐free digital feedforward compensator for micromachined actuators
Author(s) -
Qi Shengbo,
Wang Xinning,
Li Chong,
Dean Robert N.
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.5413
Subject(s) - feed forward , control theory (sociology) , bandwidth (computing) , phase margin , actuator , oscillation (cell signaling) , computer science , pipeline (software) , control engineering , electronic engineering , engineering , operational amplifier , telecommunications , amplifier , control (management) , artificial intelligence , biology , genetics , programming language
Many micro‐electro‐mechanical systems applications suffer from large oscillations that come from high‐quality factors. Designing feedback controllers is challenging because of the very limited phase margin. This work proposes a feedforward compensator approach to cancel the oscillation behaviours without the constraints of the stability margins. The essential element of this mechanism is to create a series of zeros to cancel the undesired oscillation poles. It is a practical solution because: (i) the selection of the parameters of the compensator is straight forward and robust to the model variations and (ii) the implementation uses a pipeline digital circuit architecture that enables MHz range bandwidth.