In the monitoring of structural systems, the use of multiple high-end sensors may prove to be economically prohibitive. The alternative approach would be to use fewer devices capable of moving across the span of the structural system. In the proposed approach, a velocity sensor that is able to move across the spatial domain and obtain point-wise velocity measurements is combined to a novel dynamic observer. Based on the measured velocities, a state estimator is developed, the gain of which depends on the motion of the sensor. The motion of the sensor is defined using Lyapunov redesign methods and depends only on the estimation error at the current sensor position. The guidance policy is performance based and steers the sensor to spatial regions of the structure with larger estimation errors. The proposed approach is validated with a one-dimensional flexible structure, mathematically described by an Euler–Bernoulli partial differential equation. The moving sensor is realized through the use of a laser scanning vibrometer that provides both the moving measurements and additional measurements against which the proposed approach will be validated. Once measurements over a large number of locations are acquired, the experimental results are fed to the algorithm that selects the instantaneous sensor location. Experimental results for linear and nonlinear beam cases are presented to show the feasibility and robustness of the proposed approach.

在结构系统的监视中，使用多个高端传感器可能被证明在经济上是禁止的。另一种方法是使用较少的能够在结构系统的整个范围内移动的设备。在提出的方法中，将能够在空间域上移动并获得逐点速度测量值的速度传感器组合到一种新颖的动态观测器中。基于测得的速度，开发了状态估计器，其状态的增益取决于传感器的运动。传感器的运动是使用Lyapunov重新设计方法定义的，并且仅取决于当前传感器位置的估计误差。指导策略基于性能，将传感器转向具有较大估计误差的结构空间区域。一维柔性结构验证了该方法的有效性，该结构由Euler-Bernoulli偏微分方程数学描述。移动传感器是通过使用激光扫描振动计来实现的，该振动计既提供了移动测量值，又提供了额外的测量值，可以针对所提出的方法进行验证。一旦获得了大量位置的测量值，实验结果就会馈送到选择瞬时传感器位置的算法中。给出了线性和非线性梁情况的实验结果，以证明该方法的可行性和鲁棒性。移动传感器是通过使用激光扫描振动计来实现的，该振动计既提供了移动测量值，又提供了额外的测量值，可以针对所提出的方法进行验证。一旦获得了大量位置的测量值，实验结果就会馈送到选择瞬时传感器位置的算法中。给出了线性和非线性梁情况的实验结果，以证明该方法的可行性和鲁棒性。移动传感器是通过使用激光扫描振动计来实现的，该振动计既提供了移动测量值，又提供了额外的测量值，可以针对所提出的方法进行验证。一旦获得了大量位置的测量值，实验结果就会馈送到选择瞬时传感器位置的算法中。给出了线性和非线性梁情况的实验结果，以证明该方法的可行性和鲁棒性。