采用无压浸渗复合方法并利用自行研制的专用工艺设备， 用高体份(55%～57%)SiC/Al复合材料制备了机载光电稳定平台的内框架，并将其作为有效载荷的主承力框架。由于该材料结构承载功能优异(弹性模量为213 GPa,比模量比铝合金、钛合金及钢高出近2倍),热控功能好(其热膨胀系数低于钛合金,热导率接近纯铝,达到235 W/(m·K),与常用的铝合金材料相比，整个内框架最大变形量减少了60%，基频提升了65%，轻量化效果的并减低了热控负荷。检测结果表明，系统的稳定精度达到20 μrad。本项研究首次将SiC/Al复合材料应用于机载光电稳定平台，为航空新材料的应用做出了有效的探索。

By using the self-manufactured special processing equipment, the inner frame of a unmanned airborne optoelectronic stabilization platform is fabricated by the aluminum matrix composites with high volume fraction (55%～57%) SiC particles based on a pressureless infiltration technology. Benefiting from the composite's good mechanical properties, such as ultra-high modulus (the Young’s modulus is 213 GPa and the specific modulus is approximately three times of those of Al, Ti, and steel), low thermal expansion coefficient and very high thermal conductivity(235 W/m·K), the inner frame has decreased the maximum deformation by 60% and increased the fundamental frequency by 65% as compared with those of aluminum alloy materials,respectively. Therefore, a significant lightening effect is achieved and the thermal control load is also reduced. The test result indicates that the stable accuracy of the system achieves 20 μrad. The research applies the SiC/Al composites to airborne photoelectric platforms for the first time,which makes a effective exploration for the new aviation material's application.