Reliability evaluation and optimization design method of piezoelectric actuator vibration suppression system

压电作动器振动抑制系统可靠性评估及优化设计

¹ School of Automobile, Chang'an University, Xi'an 710064, China
² Beijing Mechanical and Electrical Engineering Institute, Beijing 100074, China
³ School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received: 24 November 2022

Abstract

As an effective means of structural vibration suppression, piezoelectric actuator vibration suppression system(PAVSS) has been gradually applied in structural vibration control. However, the performance degradation or failure of piezoelectric actuator under long service life will lead to the degradation of service reliability of PAVSS, so the scheme obtained by deterministic optimization method is difficult to ensure the service reliability. Aiming at the reliability evaluation and optimal design of PAVSS in service, the failure mechanism considering of the performance degradation or failure of piezoelectric actuator is analyzed, and the reliability evaluation method based on nested sampling and weighted statistics is constructed, which solves the reliability evaluation problem of PAVSS with the characteristics of load-sharing and redundancy. A reliability-based optimization method based on master-slave parallel genetic algorithm is proposed to optimize the position and angle of the actuators. At last, the feasibility and effectiveness of the proposed method are proved by an example, which not only provides a theoretical basis for the high reliability design of PAVSS in service, but also provides a new solution for the engineering problem of structural vibration control.

摘要

作为结构振动抑制的有效手段, 压电作动器振动抑制系统在结构振动控制中逐步得到应用。但是长服役期内压电作动器的性能退化/失效会导致整个振动抑制系统的服役可靠性退化, 确定性优化方法得到的方案难以保证系统的服役可靠性。针对服役期内压电振动抑制系统的可靠性评估及优化设计问题, 分析了压电作动器性能退化和失效下振动抑制系统的失效机理, 构建了基于嵌套抽样和加权统计的振动抑制系统可靠性评估方法, 解决了具有载荷共享和冗余特征的振动抑制系统可靠性评估问题, 提出了基于主从式并行遗传算法的压电作动器可靠性布局优化方法, 实现了作动器的位置和角度优化。通过算例证明了可靠性布局优化的可行性和有效性, 为服役期内振动抑制系统的高可靠性设计提供理论基础, 也可为结构振动控制这一工程问题提供新的解决思路。