基于TEC的石英挠性加速度计组件一体化温控结构热设计

Thermal Design of Integrated Temperature Control Structure for Quartz Flexible Accelerometer Components Based on TEC

在高精度惯性导航系统和捷联惯导重力测量系统中,石英挠性加速度计组件的温控精度直接影响系统的导航和重力测量精度。为保证加速度计工作环境的温度稳定性,设计了基于半导体制冷器(Thermoelectric Cooler, TEC)的石英挠性加速度计一体化温度控制系统。对系统硬件结构和热特性进行了分析,完成了相关组件的热力学建模、仿真分析和结构优化,并设计了常温及变温环境下的温控实验。相关结果表明,一体化温控系统在2 h室温环境下,加速度计组件温度波动峰-峰值优于0.006℃;在最高10℃/h的快速变温环境下,系统3 h温度控制波动峰-峰值优于0.006℃,加速度计表头温度波动峰-峰值优于0.03℃。对比温控关闭状态下的实验结果,温控开启时,加表输出稳定性及输出精度分别得到了34.2倍和37.6倍的提升。相关结果表明系统有较好的鲁棒性和温控精度,可以满足多种应用环境下的加速度计组件温控应用需求。

In high-precision inertial navigation systems or strap-down inertial navigation gravity measure-ment systems,the temperature control accuracy of the quartz flexible accelerometer directly affects the navigation and gravity measurement accuracy of the system.To ensure the temperature stability of the accelerometer assembly working environment,this paper designed a temperature control system based on a thermoelectric cooler,analyzed the hardware structure and thermal characteristics of the system,and designed temperature control experiments under normal and variable temperature environments.The experiment results showed that the peak-to-peak temperature fluctuation of the accelerometer assembly is better than 0.006℃ under 2-hour room temperature conditions;Under a rapidly changing temperature environment of up to 10℃/h,the system′s 3-hour temperature control fluctuation peak to peak is better than 0.006℃,The peak to peak temperature fluctuation of the accelerometer head is better than 0.03℃.Compared to when the temperature control is turned off,when the temperature control is turned on,the stability and accuracy of the meter output have been improved by 34.2 times and 37.6 times.The system has good robustness and temperature control accuracy,and can meet the temperature control requirements of accelerometer components in various application environments.