• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Output-based optimal placement of actuators and sensors for active vibration and structural acoustic control.
【24h】

Output-based optimal placement of actuators and sensors for active vibration and structural acoustic control.

机译：基于输出的执行器和传感器的最佳放置，用于主动振动和结构声学控制。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel method for optimal sensor and actuator placement for active vibration control (AVC) and active structural acoustic control (ASAC) is presented which will use the concept of an output controllability grammian (OCG). The OCG is based on minimum energy principles from linear systems theory in a similar manner to the well known controllability and observability grammians. This provides a means of qualitatively gauging the controllability of outputs to determine the optimality of actuator and sensor arrangements. This is in contrast to using the state response which has been well explored in the structural control community.;The proposed output controllability grammian based placement method will be shown to be more effective than other state based methods in a least squares based LQR feedback control system when applied to vibration suppression problems. Distributed parameter systems are used as examples utilizing point force and distributed moment actuation and accelerometers as structural sensors. Considerations are also given to actuation dynamics when using a proof mass actuator (PMA) to provide the closed loop control force. Studies are performed which show that the placement results from OCG are relatively insensitive to variations in PMA damping and stiffness properties.;Experimentally, an aluminum space-frame is used as a test bed for the optimal actuator and sensor locations found using the OCG. Two AVC problems are investigated. First an active strut is used in a collocated actuator/sensor arrangement using direct velocity feedback (DVFB). Next a small piezoelectric PMA is used with acceleration feedback to attenuate the structures motion when subjected to broad-band noise from an electromagnetic shaker.;The OCG is also used for placement of a PMA for an ASAC application. Two different types of problems are examined, (1) sound minimization at a point, and (2) global reduction of acoustic pressure within a rigid walled container. A study of the placement sensitivity to changes in actuator properties show that the optimal locations are relatively insensitive to actuator dynamics. However the closed loop performance is more sensitive to changes in the actuator dynamics.
机译：提出了一种用于主动振动控制（AVC）和主动结构声学控制（ASAC）的传感器和致动器最佳放置位置的新方法，该方法将使用输出可控制的克雷明（OCG）概念。 OCG基于线性系统理论中的最小能量原理，以与众所周知的可控制性和可观察性格拉姆人相似的方式进行。这提供了一种定性地评估输出的可控制性以确定致动器和传感器布置的最优性的手段。这与使用在结构控制社区中进行了深入研究的状态响应形成了鲜明的对比。；在基于最小二乘的LQR反馈控制系统中，建议的基于输出可革兰性的放置方法将比其他基于状态的方法更有效当应用于减振问题时。分布式参数系统用作示例，利用点力和分布式力矩致动及加速度计作为结构传感器。当使用标准质量执行器（PMA）提供闭环控制力时，还应考虑执行动力学。进行的研究表明，OCG的放置结果对PMA阻尼和刚度特性的变化相对不敏感。实验中，铝制空间框架用作测试床，用于使用OCG找到的最佳执行器和传感器位置。研究了两个AVC问题。首先，主动支杆用于直接速度反馈（DVFB）的并置执行器/传感器装置中。接下来，当受到电磁振动器的宽带噪声作用时，小型压电PMA可用于加速度反馈，从而衰减结构的运动。OCG还用于ASAC应用中的PMA放置。研究了两种不同类型的问题：（1）一点上的声音最小化；（2）刚性壁容器内的声压整体降低。对执行器特性变化的放置灵敏度的研究表明，最佳位置对执行器动力学相对不敏感。但是，闭环性能对执行器动态变化更敏感。

著录项

  • 作者

    Dunn, Barry Joe.;

  • 作者单位

    Vanderbilt University.;

  • 授予单位 Vanderbilt University.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 151 p.
  • 总页数 151
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号