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Improvement of Kalman Filter and Kalman Estimator in the Application of Structural Damage Detection

Abstract

结构健康监测技术在结构安全以及可靠度评估方面起着重要作用。目前,结构健康监测技术中关于结构损伤识别的理论研究已得到极大发展,其中基于时域振动信号的结构物理参数识别方法是结构无损检测的重要研究方向。在结构物理参数的时域识别研究中,基于最小二乘方法(LSE)以及扩展卡尔曼滤波方法(EKF)的研究得到了广泛关注。传统的扩展卡尔曼滤波方法(EKF)在应用于结构损伤识别时存在两个局限:1)EKF仅适用于结构在已知外部激励作用下的情况;2)EKF中增广的状态向量包含了结构的物理参数,由于结构状态和参数向量之间的非线性耦合,会使计算结果呈现不稳定的情况。此外,在处理复杂结构损伤识别问题时,EKF中较大维数的...Structural health monitoring technique plays an important role in structural safety and reliability assessment. In the frame of structural health monitoring, structural damage detection theory has been greatly developed at the moment, among them, the vibration-based structural parameters identification method has become a significant research aspect. In the time domain analysis, the least square e...学位:工学硕士院系专业:建筑与土木工程学院_结构工程学号:2532011115171

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