Exploring the Problems in Active Structural Control & Health Monitoring of Existing Constructed Facilities by Utilizing a Decommissioned Steel Truss Highway Bridge

辛辛那提基础设施 研究所和大学 辛辛那提-结构动力学 研究实验室是 与惠普合作 公司：Aura Systems，Inc.设计 并实现一个主动质量驱动器 闭环控制系统在250 英尺跨度双车道钢通过- 桁架公路桥 桥 位于俄亥俄州的富兰克林县 它将被加载到 结构破坏 由辛辛那提号确认 基础设施研究所。 这 这项工作得到了 俄亥俄州交通部， 联邦公路管理局 和俄亥俄州的富兰克林县。 的 实地研究基础设施， 将开发用于 破坏性试验计划将是 被用来探索 在设计和实施一个 主动控制系统 现有已建设施， 易受扭转 激发 大桥将 逐渐地摇下， 四伺服控制销毁 致动器反作用于岩石- 锚点，同时模拟 跨中固定式卡车 巷 线性化元素级 大桥的模型将是 通过影响识别，谐波 强迫励磁和整车负载 测试以反映现有的 状态 这将是基础， 控制设计 过度紧张 变形、位移和 加速仪表将 被安装为无损的， 破坏性测试;其中一些 将用于控制反馈。 主动质量驱动器系统将 利用三线性 电磁线性执行器 硬件将用于信号 调节和加工， 真实的数字化实现 控制策略。 控制 系统设计用于现有 国家将作为桥梁进行测试 位于各种极限状态。 为了测试控制系统， 桥会被突然的 初始位移释放 (step松弛）和正弦曲线 和宽带输入， 伺服液压激励器

The Cincinnati Infrastructure Institute and the University of Cincinnati - Structural Dynamics Research Laboratory are collaborating with Hewlett-Packard Co and Aura Systems, Inc. to design and implement an active-mass-driver closed-loop control system on a 250 feet span two-lane steel through- truss highway bridge. The bridge is located in Franklin County, Ohio and it will be loaded to destruction for structural identification by the Cincinnati Infrastructure Institute. This effort is being co-sponsored by the Ohio Department of Transportation, the Federal Highway Administration and Franklin County, Ohio. The field-research infrastructure which will be developed for the destructive test program will be exploited to explore the problems in designing and implementing an active-control system for an existing constructed facility which is vulnerable to torsional excitation. The bridge will be incrementally shaken-down to destruction by four servo-control actuators reacting against rock- anchors while simulating a stationary truck at mid-span in one lane. A linearized element-level model of the bridge will be identified by impact, harmonic forced-excitation and truck-load tests to reflect the existing state. This will be the basis for control design. Extensive strain, distortion, displacement and acceleration instrumentation will be installed for nondestructive and destructive testing; some of these will be used for control feedback. The active-mass driver system will utilize three linear electromagnetic linear actuators. Hardware will be used for signal conditioning and processing and for implementation of real time digital control strategies. The control system designed for the existing state will be tested as the bridge is located to various limit states. To test the control system the bridge will be excited by sudden release of an initial displacement (step relaxation) and by sinusoidal and broadband input from a linear servo-hydraulic exciter.