本发明提供了一种基于增材制造的重力梯度卫星，包括卫星本体、太阳电池阵、在轨3D打印部分载荷；其中，在轨3D打印部分载荷包括打印舱舱体、材料舱、控制盒、进料机构、打印机构、打印舱盖板、导出和压紧机构以及重力梯度杆；打印舱舱体为一个舱体，打印舱盖板为底部盖板，将舱体封闭成为一个整体；材料舱位于舱体内；控制盒是整个3D增材加工的控制核心，进料机构用于将材料舱中的材料取出，并以一定速率进给，提供3D打印头部的材料供应；导出和压紧机构位于打印舱盖板的外侧，其主要作用是在发射阶段，将重力梯度杆端部的载荷和配重压紧，确保能承受发射时的各种条件，在轨后释放，该部分确保重力梯度杆的稳定伸长，为3D打印的Z轴驱动。

The invention provides a gravity gradient satellite based on additive manufacturing. The gravity gradient satellite based on additive manufacturing comprises a satellite body, a solar cell array and an on-orbit 3D printing partial load. The on-orbit 3D printing partial load comprises a printing cabin body, a material cabin, a control box, a feeding mechanism, a printing mechanism, a printing cabincover plate, a lead-out and pressing mechanism and a gravity gradient rod. The printing cabin body is a cabin body, and the printing cabin cover plate is a bottom cover plate to seal the cabin body into a whole. The material cabin is positioned in the cabin body. The control box is the control core of the whole 3D material additive processing, and the feeding mechanism is used for taking out a material in the material cabin and feeding at a certain speed to provide the material supply for a 3D printing head. The lead-out and pressing mechanism is located on the outer side of the printing cabin cover plate, and the main function of the lead-out and pressing mechanism is to press the load and counterweight at the end of the gravity gradient rod in the launching stage to ensure that variousconditions during launching can be withstood and the load and counterweight are released after on orbit. The stable elongation of the gravity gradient rod is ensured, and the gravity gradient rod is driven by the Z axis of 3D printing.