论文标题:VBA（）关键技术研究
Study of Key Technology of VBA(Vibration Beam Accelerometer)
论文作者 姜华
论文导师 周渭,论文学位 硕士,论文专业 测试计量技术及仪器
论文单位 西安电子科技大学,点击次数 119,论文页数 51页File Size1628k
2001-04-01论文网 http://www.lw23.com/lunwen_575475562/ VBA,石英振梁加速度计,力敏感石英梁,激振电路,测频电路
VBA,quartz crystal oscillator electronic,force－sensitive
几十年来，惯性制导元件的方向是要获得越来越高的性能。这就要求加速度计具有低成本和极高的可靠性。振梁加速度计的技术特点证明它在惯导领域大有前途。 石英振梁加速度计VBA（vibration Beam Accelerometer）是采用力敏感石英梁作为敏感器件，直接能够数字输出的一种新型加速度计。由于其本身所具有的低成本、低复杂度、功耗小及与数字导航系统兼容等特点，故有着传统的模拟量输出的加速度计所不可比拟的优点，因此必将取代传统的模拟量输出的加速度计。 本文从设计一个简单、实用的双梁结构的VBA角度出发，先概括地介绍了VBA的原理、发展背景及目前国内外发展状况，阐述在我国开展VBA技术研制的必要性和紧迫性。紧接着对其结构和工作原理进行探讨，说明开展此项技术研究是可行的，并重点设计了力敏感石英梁晶控振荡电路和频率测量电路。另外，本文还分别设计了三种温度补偿电路以降低VBA表头对温度的敏感，以进一步提高了精度，并通过计算机进行仿真分析、以验证方案的可行性。还提出了几种算法来对输入加速度和输出频率之间的量值关系进行描述。 目前，课题研究已经成功地装配出国产VBA实验室样机。单梁结构样机的各项性能指标已与国外先进水平相差无几；双梁结构样机也已实现基本功能，但一些性能指标还有待进一步加强。
In navigation systems ,higher and higher performancs have been needed by the inertia components for A few dacades. Accelerometers with low cost and high reliability are badly needed. Vibration Beam Accelerometer indicate its futer for its inhere characteristics. Vibrating Beam Accelerometer (VBA) is virtually a solid state accelerometer with an inherent digital output, which utilizes force-sensitive vibrating quartz beams as the basic sensing elements. More and more research and development have be spurred because its advantages of cost, complexity, power and compatibility with digital navigation systems. In this paper, the VBA"s background and its present situation inside and outside our country will be discussed. Some research will be put into the VBA"s configuration and principles. Emphases will be put into the designs of quartz crystal oscillator electronic and the frequency measurement electronic. Meanwhile, temperature-compensating electronics will be designed for each electronic mentioned above. In order to advance the precision of the accelerometer, temperature compensation is necessarily. Simulation will be done on the computer so as to validate the functions. Now, the VBA showpieces have been produced successfully. Samples with one beam behave great, their performance is as well as the American BVA "s. But the samples with two beams need to be promoved.
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