scholarly journals ACTIVE VIBRATION CONTROL BASED ON SYSTEM IDENTIFICATION FOR CYLINDRICAL LATTICE SHELL ROOFS

2018 ◽  
Vol 83 (748) ◽  
pp. 801-810
Author(s):  
Ken'ichi MINOWA ◽  
Masayuki HATTORI ◽  
Toshiyuki OGAWA
Keyword(s):  
System Identification ◽  
Vibration Control ◽  
Active Vibration Control ◽  
Active Vibration ◽  
Lattice Shell

scholarly journals Multidimensional System Identification and Active Vibration Control of a Piezoelectric-Based Sting System Used in Wind Tunnel

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Yi Yu ◽  
Xing Shen ◽  
Yun Huang
Keyword(s):  
Control System ◽  
System Identification ◽  
Wind Tunnel ◽  
Vibration Control ◽  
Active Vibration Control ◽  
Low Frequency ◽  
Vibration Monitoring ◽  
Multidimensional System ◽  
Monitoring Method ◽  
Active Vibration

In wind tunnel tests, the cantilever sting is usually used to support aircraft models because of its simple structure and low aerodynamic interference. However, in some special conditions, big-amplitude and low-frequency vibration would occur easily on the model not only in the pitch direction but also in the yaw direction, resulting in inaccurate data and even damage of the supporting structure. In this paper, aiming at suppressing the vibration in pitch and yaw plane, a multidimensional system identification and active vibration control system on the basis of piezoelectric actuators is established. A vibration monitoring method based on the strain-displacement transformation (SDT) matrix is proposed, which can transform strain signals into vibration displacements. The system identification based on chirp-Z transform (CZT) is applied to improve the adaptability and precision of the building process for the system model. After that, the hardware platform as well as the software control system based on the classical proportional-derivative (PD) algorithm is built. A series of experiments are carried out, and the results show the exactness of the vibration monitoring method. The system identification process is completed, and the controller is designed. Vibration control experiments verify the effectiveness of the controller, and the results indicate that vibrations in pitch and yaw directions are attenuated apparently. The spectrum power is reduced over 14.8 dB/Hz, which prove that the multidimensional identification and active vibration control system has the capability to decline vibration from different directions.

scholarly journals System identification and active vibration control of a flexible structure

2012 ◽  
Vol 34 (spe) ◽  
pp. 386-392 ◽  
Author(s):  
Gustavo Luiz C. M. de Abreu ◽  
Sanderson M. da Conceição ◽  
Vicente Lopes Jr. ◽  
Michael John Brennan ◽  
Marco Túlio Santana Alves
Keyword(s):  
System Identification ◽  
Vibration Control ◽  
Active Vibration Control ◽  
Flexible Structure ◽  
Active Vibration
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