Dynamics modeling and cooperative control of multiple piezoelectric actuators for high-precision applications

在过去的二十年里，压电结构在高精度应用中的使用迅速增加。然而，压电材料固有的非线性阻碍了应用范围，并提出了一个有趣的控制挑战。当系统中涉及多个压电致动器时，这个问题变得更具挑战性。为了继承压电致动器所提供的优点，重要的是使用某些建模和控制方法来最小化或甚至消除压电致动器的非线性，诸如滞后、蠕变、动力学效应和阻尼。本发现项目旨在为高精度应用中的多个压电致动器的动力学建模和协同控制器设计的关键技术做出基础性贡献。这是申请人之前探索研究的自然结果。**这项研究将导致高保真动力学模型的成功开发，能够捕捉大部分的压电致动器的非线性。高保真模型将允许成功的非线性逆补偿和使用简单的控制器，以实现令人满意的控制性能。这项研究也将导致多个压电执行器的有效合作控制器的发展。这将使使用多个压电致动器的高精度应用成为可能，例如法布里-珀罗光谱仪和快速转向镜。通过该项目将研究的另一个主题是集成的机械和控制系统设计方法，这可以导致更好的压电驱动系统。这项研究还将为高素质人才（HQP）创造一个独特的充满活力的多学科学习和培训环境，并将在许多方面支持HQP培训。所有参与本研究的HQP将接受理论和实践方面的培训。HQP具备如此独特的研究能力，受到加拿大研究界和工业界的追捧。

The past two decades have seen a rapid increase in the use of piezoelectric structures in high-precision applications. However, the inherent nonlinearities of piezoelectric materials hinder the scope of the application and present an interesting control challenge. This issue gets more challenging when multiple piezoelectric actuators are involved in a system. To inherit the advantages offered by the piezoelectric actuators, it is important that the nonlinearities of piezoelectric actuators such as hysteresis, creep, dynamics effects and drfits are minimized or even eliminated using certain modelling and control approaches. This Discovery project aims to make fundamental contributions to the key technologies of dynamics modeling and cooperative controller design of multiple piezoelectric actuators for high-precision applications. It is a natural sequel to the applicant's previous Discovery research.******This research will lead to the successful development of high-fidelity dynamics models capable of capturing most of the nonlinearities of piezoelectric actuators. The high-fidelity models will allow the successful inverse compensation of nonlinearities and the use of simple controllers to achieve satisfactory control performance. This research will also lead to the development of effective cooperative controllers for multiple piezoelectric actuators. This will enable the high-precision applications using multiple piezoelectric actuators, for example Fabry-Perot spectrometer and fast steering mirrors. Another topic that will be investigated through this project is the integrated mechanical and control system design approach, which can lead to a better piezo-driven system.******This research will also create a unique vibrant multidisciplinary learning and training environment for highly qualified personnel (HQP) and will support the HQP training in many ways. All HQP involved in this research will be trained in both theoretical and hands-on aspects. The HQP equipped with such unique research abilities are sought after by Canadian research community and industry.