A Novel Hysteresis Reducing Piezoceramic Amplifier

摘要：

Piezoceramic materials exhibit hysteresis that forces the use of advanced algorithms in control applications, and thus limiting the potential to move from laboratory to large scale field applications. Using the nonlinear electromechanical model of piezoelectric materials as the basis for understanding the behaviors of the actuator, piezoceramic materials should be controlled using charge to effectively reduce hysteresis. On the other hand, commercial amplifiers use voltage feedback control to actuate piezoceramic materials. In this paper, the previously designed piezoceramic amplifier was fitted with a Linear Quadratic Gaussian (LQG) tracking controller to allow the reduction of hysteresis through current feedback. Tests were conducted on a two story concrete frame by comparing the frequency response of an embedded smart aggregate sensor with the reference current applied to another embedded smart aggregate actuator. From the latter test, results show a reduction of the hysteresis of about 60％ in the 10 to 3k Hz range. In addition, the overall harmonic distortion dropped by 16％.

关键词： piezoceramic amplifier hysteresis charge feedback current feedback

作者: Claudio Olmi Luyu Li Gangbing Song Leang-San Shieh

作者单位: Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204 USA Department of Mechanical Engineering, University of Houston, Houston, TX 77204 USA Department of Mechanical Engineering,University of Houston, Houston, TX 77204 USA

会议类型: 国际会议

会议名称: 2011 China Control and Decision Conference(2011中国控制与决策会议 CCDC)

会议地点: 四川绵阳

会议语种:英文

页码: 716-721

在线出版日期: 2011-05-23（万方平台首次上网日期，不代表论文的发表时间）