• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>AD-vol.69; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20041113-19; Anaheim,CA(US) >INVERSE KINEMATICS AND GEOMETRIC RELATIONS OF AN INTELLIGENT MODIFIED STEWART PLATFORM FOR THRUST VECTOR CONTROL
【24h】

INVERSE KINEMATICS AND GEOMETRIC RELATIONS OF AN INTELLIGENT MODIFIED STEWART PLATFORM FOR THRUST VECTOR CONTROL

机译：用于推力矢量控制的智能修改Stewart平台的逆运动学和几何关系

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

Adaptive or intelligent structures which have the capability for sensing and responding to their environment promise a novel approach to satisfying the stringent performance requirements of future space missions. This research effort focuses on the development of an intelligent thruster mount structure with precision positioning and active vibration suppression capability for use in a space satellite. The intelligent thruster mount would utilize piezoelectric stacks and patches for precision positioning and vibration suppression to provide fine-tuning of position tolerance for thruster alignment and low transmissibility of vibration to the satellite structure. This vibration, if not suppressed, renders sensitive optical or measurement equipment non-operational until the disturbance has dissipated. This intelligent system approach would greatly enhance mission performance by fine tuning attitude control, potentially eliminating the non-operational period as well as minimizing fuel consumption utilized for position correction. The configuration of the intelligent thruster mount system is that of a modified Stewart platform. Precision positioning of this structure is achieved using active composite strut members that use piezoelectric stack actuators and extend or contract to tilt the top device-plate where the thruster is mounted. The geometric relationship between the Stewart platform and the modified Stewart platform is described, and an inverse kinematics analysis of the modified Stewart platform has been developed and is used to determine the required axial displacement of the active struts for the desired angular tilt of the top device-plate. The active struts can participate in precision positioning as well as vibration suppression of the top device-plate where the thruster, i.e., the source of the unwanted vibrations and misalignment, is mounted. The proposed Thrust Vector Control (TVC) intelligent platform offers a promising method for achieving fine tuning of positioning tolerances of a thruster as well as minimizing the effects of the disturbances generated during thruster firing in spacecraft such as a satellite.
机译：具有感知和响应周围环境能力的自适应或智能结构有望满足未来太空飞行任务对性能的严格要求。这项研究工作的重点是开发一种用于太空卫星的具有精确定位和主动减振功能的智能推进器安装结构。智能推进器安装架将利用压电叠层和贴片进行精确定位和振动抑制，从而对推进器对准的位置公差和振动对卫星结构的低传递性进行微调。如果不加以抑制，这种振动会使敏感的光学或测量设备无法工作，直到干扰消失为止。这种智能系统方法将通过微调姿态控制来极大地提高任务性能，从而有可能消除非运行时间并最大程度地减少用于位置校正的燃油消耗。智能推进器安装系统的配置是经过修改的Stewart平台的配置。这种结构的精确定位是通过使用压电叠层致动器的主动复合撑杆构件来实现的，该主动复合撑杆构件延伸或收缩以倾斜安装推进器的顶部装置板。描述了Stewart平台和改进的Stewart平台之间的几何关系，并开发了对改进的Stewart平台的逆运动学分析，并将其用于确定活动支撑杆所需的轴向位移，以实现顶部设备的所需角度倾斜-盘子。主动支撑杆可参与顶部推进器的精确定位以及振动抑制，在推进器即安装了不必要的振动和未对准的源头。提议的推力矢量控制（TVC）智能平台为实现对推进器定位公差的微调以及最小化在航天器（例如卫星）中推进器发射过程中产生的干扰影响提供了一种有前途的方法。

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