Acceleration feedback control of human-induced floor vibrations
Acceleration feedback control of human-induced floor vibrations
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DOI：
10.1016/j.engstruct.2009.09.003
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发表时间：
2010
影响因子：
5.5
通讯作者：
I. M. Díaz;P. Reynolds
中科院分区：
文献类型：
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作者：
I. M. Díaz;P. Reynolds
基于质量型作动器的主动振动控制(AVC)被认为是一种适合于抑制楼板结构中人的运动引起的振动的技术。已经观察到，尽管考虑了执行器/传感器的配置控制，执行器动力学仍对结构动力学有很大影响。不再实现配置控制系统的极点和零点交错的众所周知的性质。因此，以前被其他研究人员使用的基于速度的反馈控制可能不是一个好的解决方案。本文提出了一种基于带相位滞后补偿器的加速度反馈控制方案的设计过程，这种控制方案通常不同于积分电路。将这种一阶补偿器应用于输出(加速度)，使得考虑到地板和执行器动力学之间的相互作用，引入的相对稳定性和潜在阻尼显著增加。此外，为避免行程饱和而设计的高通滤波器被应用于控制信号。按照此流程设计的AVC系统已经通过了仿真评估，并在一个在役的开放式办公楼层成功实施。步行试验的实际减振率约为60%，全天振动监测的减振率超过90%。
Active vibration control (AVC) via a proof-mass actuator is considered to be a suitable technique for the mitigation of vibrations caused by human motions in floor structures. It has been observed that actuator dynamics strongly influence structure dynamics despite considering collocated actuator/sensor control. The well-known property of the interlacing of poles and zeros of a collocated control system is no longer accomplished. Therefore, velocity-based feedback control, which has been previously used by other researchers, might not be a good solution. This work presents a design process for a control scheme based on acceleration feedback control with a phase-lag compensator, which will generally be different from an integrator circuit. This first-order compensator is applied to the output (acceleration) in such a way that the relative stability and potential damping to be introduced are significantly increased accounting for the interaction between floor and actuator dynamics. Additionally, a high-pass filter designed to avoid stroke saturation is applied to the control signal. The AVC system designed according to this procedure has been assessed in simulation and successfully implemented in an in-service open-plan office floor. The actual vibration reductions achieved have been approximately 60% for walking tests and over 90% for a whole-day vibration monitoring.