【作者】 王威；

【导师】 袁赣南；

【作者基本信息】 哈尔滨工程大学 ， 导航、制导与控制， 2005， 硕士

【摘要】 光纤陀螺仪是激光陀螺的一种,它采用的是Sagnac干涉原理,以激光作为光源,用光纤构成环形光路并检测出由正反时针沿光纤传输的两束光,随光纤环转动而产生的两路激光束之间的相位差,由此计算出旋转的角速度。 本论文所讨论的干涉型闭环光纤陀螺的实现是基于DSP和PGGA两个数字器件所搭建起来的,本章围绕着这两个器件来说明整个闭环光纤陀螺的构成和工作原理。在整个系统中,DSP和PGGA分别担任同的角色,分别完成不同的功能。总的说来,PGGA主要实现整个系统的时序控制和闭环回路,以及为DSP提供原始滤波数据;而DSP主要的工作是从PGGA那里取来第一个加法器输出的数据作为原始数据,再对数据进行滤波处理,最后的处理结果作为转速的信息送给捷联惯导系统。 文章主要围绕着如何提高陀螺的灵敏性能和稳定性来展开。分别从软件和硬件两个方面来讨论如何提高陀螺的性能。软件方面主要讨论了前端采样信号处理;陀螺转速信息的滤波输出以及闭环的调节。硬件方面主要讨论了如何提高系统的稳定性、减小干涉信号的噪声以及如何处理好DSP和PGGA之间的通信问题。 实践表明,运用文中所讨论的方法,陀螺的灵敏度和稳定性都有一定的提高,理论和方法切实有效。更多还原

【Abstract】 FOG is one kind of laser gyroscopes. IT is based on the interferential theory of Sagnac. And its lamp-house is used with laser. A photic loop is made by fiber. There are clockwise and withershins sheaveses of lights transfer in the circle. With the turn of the circle ,the two lights introduce phasic difference ,so the angle velocity is measured.The system of FOG introduced in this paper is based on DSP and FPGA. The structure and working course of the system are also grounded on the two parts of an apparatus. DSP and FPGA play different parts in the system. FPGA is mainly used to produce scheduling and form the closed loop. And another use of FPGA is that provide DSP original data. DSP is used as digital filters used by sampling at the foreside and at the export correspondingly.The original data used by DSP is taken from the first adder in the circle. After the DSP’s disposal,the output data are sent to guidance system.This paper’s main purposes and content are what how to improve the system’s sensitivity and stability.In order to improve the FOG’s capability,it is separately discuss from hardware aspect and software aspects.It is mainly discuss the following three aspects in the software :forehead sampling and disposal of sample; the filter of the output data and accommodation of the circle. On the other hand ,the task of the hardware is mainly that enhancement of the stability; decrease of the circuit’s yawp and the harmony between DSP and FPGA.The measures mentioned in the paper are testified effective practically. The FOG’s sensitivity and stability have acquire definite exaltation.更多还原