Wireless feedback structural control with embedded computing
Wireless feedback structural control with embedded computing
复制标题
嵌入式计算的无线反馈结构控制
DOI：
10.1117/12.658908
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发表时间：
2006
影响因子：
5.4
通讯作者：
C. Loh
中科院分区：
文献类型：
--
作者：
Yang Wang;Andrew Swartz;J. Lynch;K. Law;K. Lu;C. Loh
近年来，人们进行了大量的研究，以期将结构控制作为减轻土木结构动力响应的直接手段。在这些努力的同时，结构工程领域目前正在探索用于结构监测系统的低成本无线传感器。为了减少在今天的结构控制系统中安装大量同轴电缆所带来的劳动力和成本，无线传感器被认为是未来系统的基石。在所提出的系统中，无线传感器被设计为执行控制系统中的三个主要任务；无线传感器负责结构响应数据的收集、控制力的计算以及向执行器发出命令。在这项研究中，无线传感器被设计来明确地完成这些任务。然而，控制系统的要求，即实时响应的需求，推动了当前无线传感器技术的极限。无线信道会在无线传感器之间的数据通信中引入延迟；在某些罕见的情况下，可能会遇到直接的数据丢失。这些问题被认为是这项可行性研究的复杂部分。介绍了一种无线结构传感与控制(WiSSCon)原型系统。为了验证该原型系统的性能，对安装了磁流变阻尼器的半比例三层钢结构进行了振动台试验。与安装在相同结构中的基于电缆的控制系统相比，WiSSCon系统的性能是有效和可靠的。
In recent years, substantial research has been conducted to advance structural control as a direct means of mitigating the dynamic response of civil structures. In parallel to these efforts, the structural engineering field is currently exploring low-cost wireless sensors for use in structural monitoring systems. To reduce the labor and costs associated with installing extensive lengths of coaxial wires in today's structural control systems, wireless sensors are being considered as building blocks of future systems. In the proposed system, wireless sensors are designed to perform three major tasks in the control system; wireless sensors are responsible for the collection of structural response data, calculation of control forces, and issuing commands to actuators. In this study, a wireless sensor is designed to fulfill these tasks explicitly. However, the demands of the control system, namely the need to respond in real-time, push the limits of current wireless sensor technology. The wireless channel can introduce delay in the communication of data between wireless sensors; in some rare instances, outright data loss can be experienced. Such issues are considered an intricate part of this feasibility study. A prototype Wireless Structural Sensing and Control (WiSSCon) system is presented herein. To validate the performance of this prototype system, shaking table experiments are carried out on a half-scale three story steel structure in which a magnetorheological (MR) damper is installed for real-time control. In comparison to a cable-based control system installed in the same structure, the performance of the WiSSCon system is shown to be effective and reliable.