點擊此處 ,將本頁翻譯成中文
將本頁翻譯成中文
您現在的位置:首頁> 外文會議>Advances in Adaptive Optics II pt.2 >文獻詳情
【6h】

Actuator tests for a large deformable membrane mirror

【摘要】In the design of a large adaptive deformable membrane mirror, variable reluctance actuators are used. These consist of a closed magnetic circuit in which a strong permanent magnet provides a static magnetic force on a ferromagnetic core which is suspended in a membrane. By applying a current through the coil which is situated around the magnet, this force is influenced, providing movement of the ferromagnetic core. This movement is transferred via a rod imposing the out-of-plane displacements in the reflective deformable membrane. In the actuator design a match is made between the negative stiffness of the magnet and the positive stiffness of the membrane suspension. If the locality of the influence functions, mirror modes as well as force and power dissipation are taken into account, a resonance frequency of 1500 Hz and an overall stiffness of 1000 N/m for the actuators is needed. The actuators are fabricated and the dynamic response tested in a dedicated setup. The Bode diagram shows a first eigenfrequency of 950 Hz. This is due to a lower magnetic force than expected. A Helmholtz coil setup was designed to measure the differences in a large set of permanent magnets. With the same setup the 2nd quadrant of the B-H curve is reconstructed by stacking of the magnets and using the demagnetization factor. It is shown that the values for H_c and B_r of the magnets are indeed lower than the values used for the initial design. New actuators, with increased magnet thickness, are designed and currently fabricated.

【會議名稱】 Advances in Adaptive Optics II pt.2

【會議地點】OrlandoFL(US)

【作者】Roger Hamelinck;Nick Rosielle;Maarten Steinbuch;Rogier Ellenbroek;Michel Verhaegen;Niek Doelman;

【作者單位】Technische Universiteit Eindhoven, Department of Mechanical Engineering, Control Systems Technology, Den Dolech 2, 5600 MB Eindhoven, The Netherls;

【會議組織】

【會議召開年】2006

【頁碼】P.627225.1-627225.9

【總頁數】9

【原文格式】PDF

【正文語種】eng

【中圖分類】P111.3;TH751;

【關鍵詞】electromagnetic;actuator;deformable;mirror;Helmholtz;coil;

聯系方式:18141920177 (微信同號)

客服郵箱:kefu@zhangqiaokeyan.com

京公網安備:11010802029741號 ICP備案號:京ICP備15016152號-6 六維聯合信息科技 (北京) 有限公司?版權所有
  • 客服微信

  • 服務號

亚洲校园自拍卡通图片区_超清av在线播放不卡无码_人与动人物特级Av片在线观看_国产被弄到高潮正在播放