• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Fifth Asia International Symposium on Mechatronics >LQG compensator for large antenna under wind disturbance
【24h】

LQG compensator for large antenna under wind disturbance

机译：LQG大型天线在风干扰下的补偿器

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

An increased frequency band requires a more accurate pointing ability in large antenna. Accurate tracking by large antenna must be assured during changing weather conditions. However, because of the outdoor nature of their operations, and especially for those with a low natural frequency, the antenna could be severely influenced by the wind disturbances. Furthermore, it would be difficult to compensate for any pointing error due to reflector deformations which are usually hard to estimate and are ignored. To decrease the pointing deviation, caused by flexible deformation of the antenna structure under wind load, a robust control method with wind rejection is proposed. Firstly, the pointing errors arising from structural deformation are analysed and a pointing control-oriented antenna model catering for the flexible deformation of the structure is presented. Secondly, a linear-quadratic-Gaussian (LQG) controller is designed to reject wind disturbances. Finally, a series of simulations of a 7.3 m antenna is conducted. Compared with the traditional proportional-integral-derivative (PID) controller, the pointing error could be reduced by 77.5% with the compensation method proposed under the wind speed at 10m/s.
机译：增大的频带要求大型天线具有更精确的指向能力。在变化的天气条件下，必须确保使用大型天线进行准确的跟踪。然而，由于其操作的户外性质，尤其是对于那些固有频率较低的操作，天线可能会受到风力干扰的严重影响。此外，将难以补偿由于反射器变形而导致的任何指向误差，该反射器变形通常难以估计并且被忽略。为了减小天线结构在风荷载作用下的柔性变形所引起的指向偏差，提出了一种鲁棒的抗风控制方法。首先，分析了由于结构变形引起的指向误差，提出了一种针对结构柔性变形的指向控制的天线模型。其次，设计了线性二次高斯（LQG）控制器来抑制风扰。最后，对7.3 m天线进行了一系列仿真。与传统的比例-积分-微分（PID）控制器相比，在风速为10m / s的情况下，提出的补偿方法可以将指向误差降低77.5％。

著录项

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