卫星10 N推力器复合材料支架的研制

文章阐述了卫星10N推力器复合材料支架的技术要求、工艺方案、研制和振动试验.10N推力器支架是封闭的盒形结构,受力状态复杂,尺寸公差要求高.采用缝合-树脂转移成型(RTM)组合工艺,保证了精度；选用水溶性芯模,解决了脱模难题.与原铸镁支架相比,复合材料支架的重量减轻了35％、制造工时缩短了80％、成本节约了20％.产品通过了鉴定级正弦和随机振动试验;振动试验后经超声波无损检测证实,支架无损伤,满足卫星发射阶段的力学环境要求.

Manufacture of 10 N thruster bracket of composite materials for satellites

This paper discusses the technical requirements, the scheme, the manufacturing process, and the vibration tests for 10 Newton （10N） thruster bracket made of carbon fiber reinforced polymer （CFRP） for satellites. The bracket is of a closed-cavity configuration, with complicated mechanical environment. The allowable errors of dimension are very limited. By means of the stitching-resin transfer molding （RTM） teclmique, the accuracy of the bracket can be ensured. With a water soluble core, the demolding can be done satisfactorily. Compared with the original casting magnesium bracket, the weight of the CFRP bracket is reduced by 35%, the processing time is reduced by 80%, an6 the cost is reduced by 20%. The bracket has passed the vibration test for the qualification level. The ultrasonic nondestructive test shows that the bracket has no damage after the vibration test, which indicates that the bracket meets the environmental demands of satellites in the launching stage.