CAREER: Design and Integration of Piezoelectric Actuators in Civil Engineering Structures

这个CAREER项目的主要目标是开发具有高控制能力的压电执行器，并将其应用于建筑结构。 这些致动器是压电楔形致动器、压电驱动摩擦阻尼器和剪切模式压电致动器。 引入桁架机构以进一步放大来自致动器的控制力。 该项目包括三个致动器的设计和制造，建模和测试，以及将其集成到1/4比例的钢框架结构中。 将建立结构和致动器的分析模型，并在实验室中进行实验验证。 这些致动器的有效性是通过减少峰值位移/加速度响应的结构时，受到地震地面运动。 对于所有致动器，将开发具有局部变形和力（加速度）反馈的简单但鲁棒的控制算法。 强调协调的跨学科合作和行业参与。 研究成果将被实施到两个最近开发的智能结构研究生课程，并通过在几个先驱咨询公司提供内部演示传播给专业工程师。 一个小规模的，两层的塑料框架的设计和制造演示给K-12学生和高年级本科生，以激发他们的兴趣，结构控制和准备他们接受高等教育。 这是一个FY 98职业奖。

The primary goal of this CAREER project is to develop piezoelectric actuators with high control capability and implement them in building structures. These actuators are a piezoelectric wedge actuator, a piezoelectrically-driven friction damper, and a shear-mode piezoelectric actuator. A truss mechanism is introduced to further amplify the control force from the actuators. The project consists of design and fabrication of the three actuators, their modeling and tests, and their integration into a 1/4-scale steel frame structure. Analytical models of the structure and actuators will be established and experimentally verified in a laboratory. Effectiveness of these actuators is measured by the reduction of peak displacement/acceleration responses of the structure when subjected to earthquake ground motion. For all actuators, simple but robust control algorithms with local deformation and force (acceleration) feedback will be developed. Coordinated interdisciplinary collaboration and industry participation are emphasized. The research results will be implemented into two recently-developed graduate courses on smart structures and disseminated to professional engineers by delivering in-house presentations in several pioneer consulting firms. A small-scale, two-story plastic frame is designed and manufactured for demonstration to K-12 students and senior undergraduates to stimulate their interest in structural control and prepare them for higher education. This is a FY98 CAREER award.