TY - JOUR
T1 - Virtual absorbed energy in decentralized velocity feedback control of a plate with piezoelectric patch actuators
AU - Cao, Yin
AU - Sun, Hongling
AU - An, Fengyan
AU - Li, Xiaodong
N1 - Funding Information:
This work is supported by National Natural Science Foundation of China (Grant Nos. 11004216, 11004217 ) and the Knowledge Innovation Program of Institute of Acoustics, Chinese Academy of Sciences.
PY - 2013
Y1 - 2013
N2 - Feedback gain is a key factor in decentralized velocity feedback control. It is known that an optimal feedback gain value exists with which the active damping effect could be maximized. In this paper, a method of finding suitable feedback gains for decentralized velocity feedback control with piezoelectric patch actuators is investigated. The energy absorption of piezoelectric patch actuators is calculated. The concept of virtual energy absorption of the piezoelectric patch actuator is proposed, through which the optimal feedback gain can be got conveniently. Numerical investigations are performed to explore the relationships between the virtual energy absorption by piezoelectric patch actuators and the kinetic energy of the structure. The results show that maximizing the broadband virtual energy absorption is nearly equivalent to minimizing the kinetic energy. A robust self-tuning algorithm is also proposed with maximizing the broadband virtual energy absorption. This algorithm can simultaneously update feedback gains of more than one control units, and find the optimal feedback gains automatically.
AB - Feedback gain is a key factor in decentralized velocity feedback control. It is known that an optimal feedback gain value exists with which the active damping effect could be maximized. In this paper, a method of finding suitable feedback gains for decentralized velocity feedback control with piezoelectric patch actuators is investigated. The energy absorption of piezoelectric patch actuators is calculated. The concept of virtual energy absorption of the piezoelectric patch actuator is proposed, through which the optimal feedback gain can be got conveniently. Numerical investigations are performed to explore the relationships between the virtual energy absorption by piezoelectric patch actuators and the kinetic energy of the structure. The results show that maximizing the broadband virtual energy absorption is nearly equivalent to minimizing the kinetic energy. A robust self-tuning algorithm is also proposed with maximizing the broadband virtual energy absorption. This algorithm can simultaneously update feedback gains of more than one control units, and find the optimal feedback gains automatically.
KW - Decentralized feedback control
KW - Piezoelectric patch actuators
KW - Robust self-tuning algorithm
KW - Virtual energy absorption
UR - http://www.scopus.com/inward/record.url?scp=84874677513&partnerID=8YFLogxK
U2 - 10.1016/j.apacoust.2013.01.001
DO - 10.1016/j.apacoust.2013.01.001
M3 - Article
AN - SCOPUS:84874677513
SN - 0003-682X
VL - 74
SP - 909
EP - 919
JO - Applied Acoustics
JF - Applied Acoustics
IS - 6
ER -