Composite modeling and parameter identification of broad bandwidth hysteretic dynamics in piezoelectric fast steering platform

摘要

Over a broadband range of frequencies, it is difficult to develop precise model of piezoelectric fast steering platforms (FSPs) due to the complex hysteretic and dynamic behaviors. This paper thus presents one approach of composite modeling and parameter identification by employing a composite hysteretic model. The proposed composite model consists of the Bouc-Wen hysteresis, electro-mechanical dynamics, creep dynamics and the high frequency mirror dynamics. Physical meanings can be found in the linear component which is beneficial to controller design and other further developments using the proposed model. A step-by-step approach is proposed to identify the composite hysteretic model. Finally, the FSP experiment is provided to validate the effectiveness of the proposed modeling and parameter identification approaches. (C) 2018 Elsevier Ltd. All rights reserved.