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Active structural acoustic control smart panel with small scale proof mass actuators

机译:带有小型检测质量执行器的主动结构声学控制智能面板

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摘要

This thesis presents a comprehensive study of decentralised feedback control on a smart panel with electrodynamic proof mass actuators and velocity sensors at their footprints. The aim is to provide guidance for the design of light, simple, robust and low cost, control units which can be attached in large numbers to flexible structures in order to control their spatially averaged response and sound radiation at low audio-frequencies. The first part of the thesis is focused on the identification of simple and effective single channel feedback control laws. In particular the stability properties and control performance produced by Proportional, Integral, Derivative, PI, PD, PID feedback control laws are assessed with reference to two simple problems where a single degrees of freedom system is controlled by an ideal reactive force actuator and by a practical proof mass actuator. Following this introductory study, the implementation of decentralised feedback control on a smart panel with five control units using proof mass electrodynamic actuators is investigated for the best two cases of Proportional and PID control. In parallel the practical design of small scale control units is explored. In particular the scaling of the stability and control performance properties of a single control unit that implements proportional control is examined using a stability–control formula. The final part of the thesis presents the stability and control performance tests carried out on a single control unit and on five decentralised control units. For the multiple channel control case, the reductions of the spatially averaged vibration measured with a laser vibrometer and the reduction of the total sound power radiation measured in an anechoic room are presented.
机译:本文对智能面板上的分散反馈控制进行了全面的研究,该智能面板上有电动证明质量执行器和速度传感器。目的是为轻量,简单,坚固且低成本的控制单元的设计提供指导,该控制单元可以大量连接到柔性结构上,以便在低音频频率下控制其空间平均响应和声音辐射。本文的第一部分着眼于简单有效的单通道反馈控制律的识别。尤其是参照两个简单的问题来评估由比例,积分,微分,PI,PD,PID反馈控制律产生的稳定性和控制性能,其中两个自由度系统由理想的反作用力执行器和一个自由度控制。实用的质量执行器。在此介绍性研究之后,针对比例和PID控制的两种最佳情况,研究了在具有五个控制单元的智能面板上使用质量质量电动执行器来实现分散反馈控制的方法。同时,探索了小型控制单元的实际设计。特别是,使用稳定性控制公式来检查执行比例控制的单个控制单元的稳定性和控制性能属性的缩放比例。本文的最后一部分介绍了在单个控制单元和五个分散控制单元上进行的稳定性和控制性能测试。对于多通道控制情况,提出了使用激光振动计测量的空间平均振动的减小和在消声室中测量的总声功率辐射的减小。

著录项

  • 作者

    González Díaz Cristóbal;

  • 作者单位
  • 年度 2007
  • 总页数
  • 原文格式 PDF
  • 正文语种 English
  • 中图分类

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