摘要
在高精度捷联惯导系统中,激光陀螺零偏随温度的变化往往不能忽略。基于不同温变环境下的激光陀螺零偏测试实验,分析了激光陀螺的零偏温度漂移特性,研究了陀螺零偏与温度变化、温变速率和温度梯度之间的相关关系,说明了在复杂或快速的温变环境中,激光陀螺零偏除与温度值变化有关外,其受温变速率和温度梯度的影响更为显著。建立了适用于缓变温度环境的静态温度模型和适用于复杂温变环境下的动态温度模型,并在快速温变和随机温变环境下对模型进行了试验验证。结果表明,动态温度模型能很好地实时补偿复杂温变引入的陀螺零偏异常,显著改善陀螺零偏稳定性使其达到或接近常温精度水平。
The bias drift of ring laser gyroscope（RLG） with temperature can＇t be ignored in high accuracy strapdown inertial navigation system（SINS）.Based on the RLG bias test experiments in different temperature environments,the gyroscope bias-temperature drift characteristics are analyzed,and the bias correlations with the temperature,temperature velocity and temperature grads are studied.It is showed that the bias could be significantly influenced by temperature change-rate and gradient besides temperature change in complex or rapid-changed temperature environments.The static bias-temperature model which is adaptive for the slowly changed temperature environments and the dynamic models which are suitable for the complex temperature environments are established.The experiments in the rapid and random temperature environments illustrate that the dynamitic temperature models could properly compensate the gyroscope bias abnormity caused by the complicated temperature change in real time,and significantly improve the RLG＇s bias stability to make it close to the normal temperature＇s accuracy level.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2011年第2期234-238,共5页
Journal of Chinese Inertial Technology
基金
国家高技术研究发展计划(863计划)(2006AA06A202)
关键词
激光陀螺
零偏
温度补偿
惯导系统
ring laser gyroscope
bias
temperature compensation
inertial navigation system
