Piezoelectric Sensor/Actuator Rosettes For Noise And Vibration Control

将为结构中的噪声和振动的传感和控制开发新的概念。对平面中单个应变分量的传感需要三个独立的测量，通常使用应变玫瑰。应变玫瑰的概念将扩展到既可用于定向传感又可用于定向驱动的压电材料。这将通过设计各向异性来实现，这是一种同时设计传感器/致动器元件的物理结构、晶体取向和磁区结构的组合以获得与主体结构的期望耦合的方法。研究将涉及反馈和控制、最佳传感器/执行器位置和空间分布，以及探索基于负电容放大器的反馈技术。将为这些传感器/执行器部件开发新的设计和分析工具。学生的参与将包括本科生(UG)研究助手、硕士研究生和博士生。一个国际组成部分将带来多元文化互动和经验。研究成果将被带到教室和UG教学实验室。结果将通过期刊出版物、会议报告以及与其他研究小组的合作广泛传播。

New concepts will be developed for sensing and control of noise and vibration in structures. Sensing of individual strain components in a plane requires three independent measurements, typically using a strain Rosette. The concept of the strain Rosette to piezoelectric materials that can be used for both directional sensing and directional actuation will be extended. This will be accomplished through designed anisotropy, an approach in which a combination of the physical structure, the crystallographic orientation, and the domain structure of the sensor/actuator element are concurrently designed to obtain desired couplings to the host structure. Research will involve feedback and control, optimal sensor/actuator location and spatial distribution, as well as exploration of feedback techniques based on negative capacitance amplifiers. New design and analysis tools will be developed for these sensor/actuator components. Student involvement will include undergraduate (UG) research helpers, MS students, and PhD students. An international component will bring in multicultural interactions and experience. Research results will be carried through to the classroom and UG instructional laboratories. Results will be broadly disseminated through journal publications, conference presentations, and collaborations with other research groups.