基于空间十字型挠性支撑结构的海洋相对重力敏感器基础问题研究

项目名称： 基于空间十字型挠性支撑结构的海洋相对重力敏感器基础问题研究

项目编号： No.61503279

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 董九志

作者单位： 天津工业大学

项目金额： 21万元

中文摘要： 对海洋重力场的高精度、快速、低成本探测不仅是海洋地震监测预报、地球科学研究、海洋学、海底资源勘探等自然科学领域的研究基础，而且对我国发展海洋经济和海洋军事具有重要的意义。针对现有的重力仪体积较大、成本高、易受交叉耦合项影响等缺点，本项目运用力平衡式原理，提出了一种基于空间十字型挠性支撑结构的重力敏感器，采用差分电容检测的方法敏感重力的微弱变化；针对海洋重力探测易受交叉耦合效应的影响，拟运用瑞利-里兹法对多摆片多方向耦合问题进行解耦；优化设计摆锤与挠性摆片支撑中心的匹配，实现对重力场的高精度、低成本、便携化测量。本项目的研究成果将为新型高精度重力检测仪器的研制提供理论依据和技术基础。

中文关键词： （角）加速度；重力敏感器；空间十字型挠性支撑结构；摆组件优化；再平衡回路

英文摘要： The importance of accurate detection of marine gravity field with high speed at low cost has been not only attached to marine seismic monitoring and prediction, marine resource exploration, earth science, and oceanography, but also to the marine economy and marine military of our country. However, the drawback of existing gravimeter such as bulky volume, high cost, and the influence of cross coupling will limit the performance. In light of this, this project proposed an innovative gravimeter to measure relative gravity variation based on the force-balance principle, the distinguishing feature of the structure is spatial cross-shape flexible supporting, which can be miniaturized due to its compact structure and has the ability of perfect fatigue resistance to detect a slight gravity variation. This project adopts differential capacitance to detect the faint change of gravity. What is more, marine gravimeter is susceptible to cross coupling, this project utilized decouple for multiple pendulum pieces and multiple directions by using Rayleigh-Ritz method. All this research has great point in the improvement of high precision gravimeter in theory and application.

英文关键词： acceleration;gravity sensor;spatital cross-shape flexible supporting structure;optimization of swinging subassembly;rebalance loop