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星载激光通信终端二维转台伺服机构是一种高精度指向调节机构,工作时对温度场稳定性及均匀性有较高要求,空间热环境剧烈变化是诱导其温度波动的外因。为达到在轨温度场精稳控制,提出了一种GEO星载经纬仪式激光通信终端二维转台伺服机构温控方案,通过机电热一体化结构设计选材、主动跟踪控温、散热及隔热设计等技术途径,实现了空间大尺寸的高精密二维转台伺服机构温度场稳定性与均匀性的精稳控制,并经过热试验与热分析综合验证,结果表明:工作轨道全寿命期间,伺服机构核心部件温度稳定控制在22.3~34.6℃范围内,温度场均匀性可控制在4℃以内。
Space-borne laser communication terminal 2-D turntable servo mechanism is a high-precision pointing mechanism, which has high requirements for the stability and uniformity of temperature field during operation. The dramatic change of space thermal environment is the external factor inducing its temperature fluctuation. In order to achieve the precise control of on-orbit temperature field, a temperature control scheme of GEO spaceborne latitude and longitude laser communication terminal two-dimensional turntable servo mechanism was proposed. The temperature, heat and heat insulation design And other technical approaches to achieve the precise control of the stability and uniformity of the temperature field of a large-scale high-precision two-dimensional rotary servo system. The results of the thermal and thermal analyzes demonstrate that during the entire working life of the track, the servo mechanism Temperature stability of the core components in the control of 22.3 ~ 34.6 ℃ range, temperature uniformity can be controlled within 4 ℃.