基于内模的光纤陀螺温控系统设计

Internal model design of temperature control system based on fiber optic gyroscope

本文针对光纤陀螺对温度敏感这一特性,在充分分析光纤陀螺物理特性基础上,分析了温度对陀螺噪声、陀螺光源的影响,温度的变化将导致光线环中不同区段上光纤的折射率不同,这种不同将最终导致光纤陀螺的零点随温度的变化而发生漂移;随后建立了相应的温度误差模型;通过最小二乘拟合,建立了较为准确的控制对象模型,采用内模控制方法对温控系统进行了设计,其设计原理简单、跟踪调节性能好、鲁棒性强、参数整定直观明了,能消除不可测干扰的影响;最后通过系统仿真,对分别用内模控制和常规PID控制设计的温控系统进行了比较,通过比较分析,验证了内模控制对于本系统所具有的优越性,研究成果对设计高精度温度控制系统有着重要的参考价值。

According to the properties of sensitivity to temperature of fiber optic gyroscope,the effecttion of temperature on noise and laser source of gyroscope were analyzed.The draft of temperature lead to the change of the refraction of fiber in different area would destroy the stability of FOG zero-temperature character;A error model was built.An accurate control model employed the least square fitting method was adepted to work for the system.The internal model control algorithm was put forward.It has a disting...