Open AccessUnknown disturbance estimation for vibration systems using distributed piezoelectric sensors
Author(s) -
Bin-Yi Wu,
Xin Qin,
Shunqi Zhang,
Jing Bai,
Ting Xue,
Rüdiger Schmidt
Publication year - 2018
Publication title -
mechanics and industry
Language(s) - English
Resource type - Journals
eISSN - 2257-7777
pISSN - 2257-7750
DOI - 10.1051/meca/2018042
Subject(s) - disturbance (geology) , piezoelectricity , control theory (sociology) , vibration , piezoelectric sensor , position (finance) , observer (physics) , finite element method , computer science , acoustics , engineering , physics , structural engineering , control (management) , geology , paleontology , finance , quantum mechanics , artificial intelligence , economics
Vibration is usually caused by external disturbances, which may lead to structural damage. Vibrations can be significantly suppressed by taking disturbances into account. However, in many cases disturbances are unknown or difficult to be measured directly. In order to estimate external unknown disturbances, this article develops a proportional-integral (PI) disturbance observer with measurement noises for smart structures using multiple distributed piezoelectric sensors. For simulation purpose, a dynamic finite element model of piezoelectric bonded smart structure is presented. This disturbance observation method is validated by estimating various kinds of unknown disturbances using piezoelectric measurements. Furthermore, the measurement numbers and the position of measurements are investigated.