航空相机焦面组件相变温控设计及验证  

Phase change thermal control design and verification of focal plane in aerial camera

作　　者：郭亮[1,2] 吴清文[1] 丁亚林[1] 张洪文[1] 张继超[1] 冷雪[1] 李延伟[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2013年第8期2060-2067,共8页Infrared and Laser Engineering

基　　金：国防预研项目

摘　　要：航空相机焦面组件是机载电子设备中具有严格温度要求的重要组件，其工作期间温度过高产生的热噪声和暗电流将导致成像质量下降。讨论分析了某型航空相机焦面组件热设计的特点，采用封装有相变材料的相变温控系统进行散热，根据结构特点和导热路径，给出了热设计方案。采用有限元数值分析方法，建立了热平衡方程和热分析计算模型，应用热分析软件IDEAS—TMG在给定温度边界条件下进行瞬态仿真分析，给出了组件的热响应性能。热分析结果表明：焦面组件和散热器工作温度范围分别为18—31．1℃、18～28．2℃。所获得的分析结果能够满足热控指标要求。最后通过热实验对采用相变温控系统的热设计方案进行了验证，验证实验结果与数值分析结果吻合较好，结果对比最大偏差均不超过5％，验证了数值分析的正确性和温度预示的有效性。实验过程中焦面组件和散热器工作温度范围分别为18—32．3℃、18—29．6℃。Focal plane in aerial plane, which has strict temperature requirement, is an important component in airborne electronic devices. The quality imaging of focal plane will fall off due to thermal noise and dark current generated during its working process. The characteristic of thermal design for focal plane in aerial camera was discussed and analyzed. Phase change system encapsulating phase change material was adopted to eliminate heat. According to the design feature and heat transfer path in focal plane, thermal design scheme of component was given. Thermal equilibrium equation and numerical analysis model of the heat transfer in focal plane were established by finite element analysis method. Based on the given temperature boundary condition, transient-state thermal analysis of component was carried out through IDEAS-TMG,which was a finite element thermal analysis software. The thermal response performance of focal plane was given. Thermal analysis results show that the operating temperature range of focal plane and radiator are 18-31.1℃ and 18-28.2℃ respectively. Simulation results obtained can meet the requirements of heat control. Thermal design scheme based on phase change is verified through thermal test, and there is a well consistency between the results derived from confirmatory test and numerical analysis. The maximum deviation between thermal analysis and thermal test are all not exceeding 5%. The correctness of numerical simulation and the validity of temperature prediction are verified. In thermal test, the operating temperature range of focal plane and radiator are 18-32.3 ℃ and 18-29.6 ℃ respectively.

关 键 词：航空相机 焦面组件 相变温控 热设计 热分析 热试验 

分 类 号：V245.62[航空宇航科学与技术—飞行器设计]