激光陀螺的虚拟仿真研究

【作者】 折文集；

【导师】 陈楸；

【作者基本信息】 西北工业大学 ， 精密仪器及机械， 2004， 硕士

【摘要】 由于环形激光陀螺是目前捷联惯导系统最理想的部件之一，世间各国都投入大量的人力物力对其进行研究，而国内激光陀螺技术与国外先进技术还有较大差距。随着计算机技术和仿真技术的飞速发展，本文将计算机仿真技术运用于激光陀螺的理论研究，对激光陀螺的一些理论现象进行仿真试验，并将虚拟仪器技术运用于仿真中，为激光陀螺的研究开辟了新的途径，对减少研究经费和缩短研究周期具有一定的现实意义。 激光陀螺的核心部件为He-Ne环形激光器，而掌握光与介质的相互作用理论是研究激光器的关键，采用拉姆半经典理论为主，在密度矩阵理论的基础上，推导环形谐振腔中描述He-Ne气体增益介质原子运动的光学布洛赫方程，运用介质极化理论得出描述激光陀螺反向行波的光强、位相所满足的自洽场方程组，在此基础上，运用MATLAB仿真软件和虚拟仪器编程语言LabWindows/CVI，对激光陀螺中的介质增益色散特性、频率牵引效应、烧孔效应及模竞争、闭锁效应及环激光的光强和相位特性进行仿真试验研究，并且运用全量子理论，对激光工作原理进行分析，得出二能级系统单模辐射场的光子数密度分布，得出激光场的光子统计分布，仿真激光场的动态建立过程。 在激光陀螺自洽场方程组的基础上，运用LabWindows/CVI软件建立了灵活方便的激光陀螺仿真平台，并进行仿真试验，仿真试验结果与理论分析很好的相符合，且能够较好地说明陀螺试验现象，即在闭锁阈值附近，由于闭锁效应和模竞争相互影响，使得激光腔中两行波相互关联，光强差随时间呈周期性变化。更多还原

【Abstract】 As one of the most idealist components in the strap-down inertial navigation system, the ring laser gyro are studied by many countries in the world, but the laser gyro technology in our country are following behind some advanced countries. Along with the latist development of computer technology and simulation technology, in this paper, the computer simulation technology was applied to the theoretical study of ring laser gyro, and do some simulated experiment of some theoretical phenomena, and also applied virtual instrument technology in the simulation, in this way, we can save some time and outlay in studying laser gyro.The key components in laser gyro is He-Ne ring laser, and the reciprocal action theory between light and medium is the base in studying the ring laser, use the Lamb half classical theory, and on the base of density matrix theory, the optical Brounch equation was established, which described the movement of amplifying medium atom in the ring syntonic cavity, and according to the medium polarize theory the self consistent equations was deduced, which describe the light intensity and phasic of the counter-propagating wave. On the basis of this equations, adopted the simulation software MATLAB and virtual instrument programming language LabWindows/CVI, we can do some simulated experiments in study the phenomenas such as amplify and dispersive characteristic of medium, mode pushing effection, burned hole effection and pattern competition, lock-in of frequency and the characteristic of light intensity and phasic of the counter-propagating wave in laser gyro. Full quanta theory was used in analysis the working principle of laser, educed the photon states of single pattern radiate in two energy-step system, and simulated the establishment of laser mode and statistical distribute of photon.According to elf consistent equations of RLG; build the simulated program with LabWindows/CVI and do some simulation experiments,The result of simulation matched the theory perfect perfectly and conform to the experiments, the locked-in and pattern competition coursed the periodic light intensity.更多还原