机抖激光陀螺温度建模与补偿技术研究

发布时间：2018-04-03 12:05

本文选题：激光陀螺　切入点：温度建模　出处：《国防科学技术大学》2014年硕士论文

【摘要】：针对复杂温度环境下激光陀螺捷联惯性系统的使用情况,本文对机抖激光陀螺温度建模与补偿技术进行了研究。论文主要完成了以下工作:建立了激光陀螺传热学物理模型,理论分析了激光陀螺零偏温度延迟效应,并从数学上推导了静态温度模型和逐步回归模型的表达式,物理上解释了传统温度模型的缺陷,并从数学上推导了一种更符合物理实际的模型——时间序列模型。通过相关性分析理论,研究了激光陀螺零偏与历史温度序列的相关性,确定了时间序列模型的模型表达式,设计了模型辨识实验,通过模型辨识的相关理论,分别从器件级和系统级两个层面,辨识了激光陀螺零偏和温度的时间序列模型。辨识结果表明,时间序列模型能显著提高激光陀螺在温变环境下的使用精度。分析了系统级温度建模过程中,减振器变形对陀螺输出的影响机理,用于指导系统级温度实验时,如何通过调整陀螺敏感轴的指向减弱减振器变形的影响。并仿真分析了减振器变形对模型补偿精度的影响,其结果可用于指导如何根据模型补偿精度的要求选择减振器的变形性能。最后,论文对传统模型和时间序列模型的环境适应性进行了验证与比较,分别比较了不同模型的鲁棒性,模型在宽温度范围以及宽温变速率范围的适应性。建模实验和验证实验表明,时间序列模型的鲁棒性更好,在宽温度范围和宽温变速率范围的适应性更好,实验结果与理论分析相吻合。因此,时间序列模型是一种更加符合复杂温度环境的激光陀螺零偏温度补偿模型。
[Abstract]:The use of laser gyro strapdown inertial system in complex temperature environment, this paper studied the dithered ring laser gyro temperature modeling and compensation technology. The paper mainly completed the following work: the establishment of laser gyro thermal physical model, theoretical analysis of laser gyro biastemperature delayed effect, and gives a mathematical derivation of the static temperature model and stepwise regression model expression, physical explanation of the defects of the traditional temperature model, and mathematically derived a more in line with the actual physical model, time series model. Through the correlation analysis theory, the correlation between laser gyro bias and temperature history sequence research, model expression time series model was determined. The design of the identification of the experimental model, through theoretical model identification, respectively from the two aspects of the device and system identification, the laser gyro bias and The time series model of temperature. The identification results show that the time series model can significantly improve the laser gyro in variable temperature environment using precision were analyzed. The system level temperature in the process of modeling, the deformation mechanism of shock absorber effect on gyro output, used to guide the system level temperature experiment, how to adjust the gyro sensitive axis pointing to the weakening of the influence the shock absorber deformation. And simulation analysis of the shock absorber effect of deformation on the accuracy of the compensation model, the results can be used to guide how to model compensation precision deformation damper performance. Finally, the environmental adaptability of the traditional model and time series model for validation and comparison, compare the robustness of different models the model in a wide temperature range and wide temperature adaptation range of strain rate. The results indicates that the modeling experiment and verification experiment, robust time series model is better, In the wide temperature range and wide temperature range, the adaptability is better. The experimental results coincide with the theoretical analysis. Therefore, the time series model is a more accurate temperature compensation model for RLG with complex temperature.

【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN96

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