热真空条件下二浮惯性测量装置组合体热控系统设计

论述了二浮惯性测量装置(Inertial Measurement Unit,IMU)组合体热控系统设计、试验验证和再设计的过程.首先分析了斜装结构形式和布局,然后基于宇航产品的热设计原则,介绍了二浮陀螺和石英加速度计的热设计情况,试验验证时发现高温段陀螺温升过大,通过更换导热系数更大的陀螺安装板材料等措施,使得陀螺能够稳定工作在最佳精度范围内.最终的试验数据和试验前后标定数据的对比表明,二浮IMU组合体热控系统的设计完全满足整船的技术要求,并为惯性仪表提供良好的温度环境,在保证惯性仪表工作精度的同时,也可大大提高其在轨工作寿命.

Thermal Control System Design of Two-Bearing Inertial Measurement Unit Table Under Heat-Vacuum Condition

This paper discussed the thermal control system design, test and re-design of a two-bearing inertial measurement uint(IMU) table in detail. First, it analyzed the oblique installed structure and layout. Then, it introduced the thermal design of two bearing gyroscope and quartz accelerometer based on the thermal design principle of aerospace products. Test results showed that during high temperature period, the temperature of the gyroscope soared. By substituting the installation plate materials with bigger thermal conductivity coefficient, the gyroscope was made to work stably in its optimal range. The final test data and comparison of calibration data showed that thermal control system the design of the two bearing table fully met the requirements of the global ship. The two-bearing IMU table could provide a good temperature environment for inertial instrument, which not only ensured the working precision of inertial instrument, but also greatly improved its on-orbit working life.