【作者】 刘海静；

【导师】 周百令；

【作者基本信息】 东南大学 ， 精密仪器及机械， 2004， 硕士

【摘要】 随着惯性仪表技术水平的提高,地球重力异常对惯导系统精度的影响日益突出,使用重力测量仪器实时地测量运动体当地的重力加速度,据此对惯导系统使用的参考重力场模型参数进行修正,是提高惯导系统精度的重要途径。石英振梁式传感器是近年来发展起来的一种新型传感器。随着惯性仪表数字化的发展,石英振梁式传感器的性能得到了不断的改善。它具有广阔的应用前景。本文提出了采用直接数字输出的石英振梁式重力传感器作为高精度重力测量的总体方案。在分析石英振梁式传感器工作原理的基础上,提出了石英振梁式重力传感器的结构设计方案,并推导出数学模型;同时结合石英压电效应和优化设计理论,设计了一个满足性能指标要求的石英振梁式重力传感器;针对该重力传感器结构,利用计算机进行了一系列的仿真,给出了其性能特点;最后,运用误差分析理论,系统的分析了石英振梁式重力传感器的主要误差及其影响。重力传感器结构设计和性能分析是重力仪方案研究工作的重要组成部分,对后期重力仪的方案设计和实际研制具有重要参考作用。更多还原

【Abstract】 With the improvement of the inertial instruments, the effect of gravity abnormity to the precision of the inertial navigation system is more and more important. Measuring the local acceleration of gravity using a sea-gravimeter and revising the reference gravitation field model is an important approach to improve the precision of inertial navigation system. Quartz vibrating-beam sensors are a new class of sensor developed in recent years. With the development of digital technique, the performance of Quartz vibrating-beam sensors will be improved and they will get wide application. A project that Quartz vibrating-beam gravity sensors with digital output are used to measure acceleration of gravity is advanced. Based on the operation principles of Quartz vibrating-beam sensors, a project of the Quartz vibrating-beam gravity sensor has been advanced, and the mathematical model has been derived. Meanwhile, based on the piezoelectricity effect and optimal design, a good-performance mechanical structure of the Quartz vibrating-beam gravity sensor has been designed. In view of the mechanical structure, a series of simulation has been done by adopting the computer simulation technique, and applied cases have been pointed out. Finally, We analyze the vital errors which have much bad influence on Quartz vibrating-beam gravity sensors performance. Structural design and performance analyse of Quartz vibrating-beam gravity sensors are the important part of the meter project and has an important influence on the later development of the sea-gravimeter.更多还原