TY - GEN
T1 - Digital charge control for reducing nonlinearity in fast steering mirrors driven by piezoelectric actuators
AU - Zhong, Jianpeng
AU - Nishida, Rina
AU - Shinshi, Tadahiko
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/20
Y1 - 2021/6/20
N2 - This paper presents the application and design of digital charge control (DCC) for reducing nonlinearity in fast steering mirrors (FSMs) driven by piezoelectric actuators (PEAs). By measuring impedance, the equivalent RC parallel circuit model of the PEA in the electrical domain is verified and the DCC evolved from the general analog charge control (ACC) for a single PEA is introduced. To apply this DCC solution to a two-degree-of-freedom (2-DOF) FSM with three PEAs, a DCC solution is proposed from the perspective of control DOFs. Based on an identified model, an improved charge controller taking into account the effect of the mechanical characteristics of the FSM on the DCC loop is designed to expand the bandwidth of the DCC loop as much as possible. Final experimental results show that the hysteresis effect and nonlinearity of the FSM can be reduced significantly using this DCC solution.
AB - This paper presents the application and design of digital charge control (DCC) for reducing nonlinearity in fast steering mirrors (FSMs) driven by piezoelectric actuators (PEAs). By measuring impedance, the equivalent RC parallel circuit model of the PEA in the electrical domain is verified and the DCC evolved from the general analog charge control (ACC) for a single PEA is introduced. To apply this DCC solution to a two-degree-of-freedom (2-DOF) FSM with three PEAs, a DCC solution is proposed from the perspective of control DOFs. Based on an identified model, an improved charge controller taking into account the effect of the mechanical characteristics of the FSM on the DCC loop is designed to expand the bandwidth of the DCC loop as much as possible. Final experimental results show that the hysteresis effect and nonlinearity of the FSM can be reduced significantly using this DCC solution.
KW - Digital charge control (DCC)
KW - fast steering mirror (FSM)
KW - hysteresis
KW - nonlinearity
KW - piezoelectric actuator (PEA)
UR - https://www.scopus.com/pages/publications/85114706939
U2 - 10.1109/ISIE45552.2021.9576261
DO - 10.1109/ISIE45552.2021.9576261
M3 - 会议稿件
AN - SCOPUS:85114706939
T3 - IEEE International Symposium on Industrial Electronics
BT - Proceedings of 2021 IEEE 30th International Symposium on Industrial Electronics, ISIE 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th IEEE International Symposium on Industrial Electronics, ISIE 2021
Y2 - 20 June 2021 through 23 June 2021
ER -