静电悬浮式天基超静平台的微振动检测与控制方法研究

项目名称： 静电悬浮式天基超静平台的微振动检测与控制方法研究

项目编号： No.51505472

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 范达

作者单位： 中国空间技术研究院

项目金额： 19万元

中文摘要： 随着高分辨率卫星、超远距离星间激光通信和深空望远镜等空间计划的不断深化，卫星上所携带的有效载荷越来越精密，星上微振动效应成为制约载荷性能不可再忽略的因素。采用悬浮方式实现载荷平台与卫星母体的动静隔离，可比传统减振方式性能要高1~2个量级，开创一条构建未来天基超静环境的可能途径。本项目以一种新型的基于静电悬浮和双级无拖曳的天基隔振减振平台为背景，对平台中的三项关键技术所涉及的理论和方法开展深入研究。主要研究内容包括：1、电容复用式高频高压驱动对高精度位移检测的多路径耦合作用机制及解耦降噪方法研究，实现对振动的精密检测；2、基于动态因子实时辨识与补偿的静电负刚度消除方法研究，实现零刚度隔振；3、基于无拖曳控制与协同控制相融合的双级无拖曳协同控制方法研究，使静电力与微推进器反推力协同工作，突破传统无拖曳卫星受微推进器性能的限制，实现在全频带上对载荷平台微振动的主动减振。

中文关键词： 静电悬浮；零刚度隔振；双级无拖曳；协同控制；主动减振

英文摘要： With the developing of the missions such as high resolution reconnaissance satellites, laser communication between satellites from an ultra-far distance and telescopes used in deep space, payloads on satellites are more and more precise. The effect of the micro vibration in the satellite can’t be ignored any longer. Using suspension mode to realize the isolation between the payload platform and satellite body-self can improve the performance of vibration control by 1~2 orders of magnitude, creating a possible way in constructing the future spaceborne ultra-quiet environment. At the background of a novel platform for spaceborne vibration isolation and vibration attenuation based on the electrostatic levitation and double drag-free, this project will study the theory and method of 3 key technologies for the platform. The main research contents are as follow: First, the mechanism of multi path coupling between the high-frequency high-magnitude driving voltage and high precision displacement measurement at the condition of capacitance multiplexing will be explored. The method of decoupling and noise reduction will be established, realizing the precise detection of vibration. Second, the method of real time identification and compensation of dynamic factor of the electrostatic negative stiffness will be researched, realizing the vibration isolation with zero stiffness. Third, the double drag-free control method, which bases on the fusion of drag free control and coordinated control will be studied, which makes the electrostatic force and the micro thruster reverse propulsive force collaborative work and breaks through constraints of the micro thruster performance of the traditional drag-free satellite. The micro vibration of payload platform can be realized by active vibration control in the entire frequency band.

英文关键词： electrostatic levitation;vibration isolation with zero stiffness;double drag-free;cooperating control;active vibration control