空间科学学报2025，Vol.45Issue(6)：1471-1481,11.DOI:10.11728/cjss2025.06.2025-0047
临近空间球载日冕仪热控系统设计方案与验证
Design Scheme and Verification of the Thermal Control System for Balloon-borne Coronagraph in Near Space
摘要
Abstract
The optical system of the balloon-borne coronagraph typically adopts a small focal ratio de-sign,leading to a slender tube structure that is highly sensitive to fluctuations in ambient temperature.To ensure stable operation under the low-temperature and low-pressure conditions of near-space,this study developed a high-precision thermal control system.The system comprises 12 sets of independently regulated temperature control units,utilizing thermistors as sensors,along with thin-film heaters and a PID control algorithm,to accurately maintain the mirror tube temperature within(-5±3)℃.By exploit-ing the differential thermal contraction properties between aluminum alloy and optical materials,the system effectively eliminates structural gaps and mitigates thermal deformation,while an active focusing mechanism compensates for focal shift caused by temperature variations.Through systematic analysis of the structural characteristics of the coronagraph and its operating environment,a heat transfer model specific to near-space conditions was established,identifying the key factors influencing the system tem-perature,and then a thermal control scheme combining multi-layer insulation and active heating was proposed.On 4 October 2022,a successful flight experiment was conducted in Da Qaidam,Qinghai Province,where the system operated at an altitude of 30 km,acquiring valuable observational data.The recovered data indicates that the temperature control system operates stably,with the temperature fluc-tuation of the coronagraph tube controlled within the design range.This effectively ensures the normal of the coronagraph in extreme environments,and provides an important technical reference for future simi-lar missions.关键词
临近空间/低温环境/日冕仪/温控系统Key words
Near space/Low-temperature environment/Coronagraph/Temperature control system分类
航空航天引用本文复制引用
WANG Jingxing,LIN Jun,KANG Kaifeng,LI Yan,SONG Tengfei,XU Fangyu,LIU Dayang..临近空间球载日冕仪热控系统设计方案与验证[J].空间科学学报,2025,45(6):1471-1481,11.基金项目
国家重点研发计划项目(2022YFF0503804)和云南省"高层次人才培养支持计划——林隽科学家工作室"资助项目共同资助 （2022YFF0503804）
