基于可重构分布式控温的高稳定度热控系统研究

Research on high stability thermal control system based on reconfigurable distributed temperature control

随着光学遥感卫星分辨率的不断提高,光学系统的口径和焦距越来越大,空间光学系统对大面积、高稳定度温度控制的需求越来越突出,而集中控温模式存在热控引线多且走线困难、测温稳定性差等不足,难以满足光学系统大面积高稳定度的控温需求.提出了一种主控加远端的分布式控温系统构架和基于差分比例电阻的高稳定度测温方法,研制了基于分布式的可重构控温系统样机.试验结果表明:系统具有较强的拓展性和自主重构能力,大大提高了热控系统的适应能力,测温稳定性优于±3mK/3h.

The aperture and focal length of optical systems are becoming larger and larger with the continuous improvement of the resolution of optical remote sensing satellites.The demand for large area and high stability temperature control of space optical systems is becoming increasingly prominent.However,the centralized temperature control mode has shortcomings such as many thermal control leads and difficult wiring,poor temperature measurement stability,which are difficult to meet the need of the large area and high stability temperature control for optical systems.A distributed temperature control system architecture based on main control and remote|control was proposed.A distributed and reconfigurable high stability temperature control system was developed based on a high stability temperature measurement method using differential proportional resistance.The experimental results show that the system has strong scalability and autonomous reconstruction ability,and it can greatly improve the adaptability of the thermal control system.The temperature measurement stability is better than±3 mK/3 h.