3results about How to "High specific stiffness" patented technology

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The invention provides a modular satellite structure based on an open type grid framework and a final assembly method thereof, and belongs to the technical field of satellite structures. The problems that according to an existing method, the defects of blind operation and adhesive fixation are not fundamentally eliminated, the cable laying efficiency is low, and the weight of an outer plate is too large are solved. The thermal control protection structure comprises an open type main bearing grid framework and a plurality of thermal control protection outer plates, the open type main force bearing grid framework is a hexahedral cage-shaped framework formed by connecting six plate-shaped grid frameworks in a butt joint mode. The thermal control protection outer plates are arranged on at least one outer side face of the open type main force bearing grid framework. The plate-shaped grid frame is used for installing one side plane of the thermal control protection outer plate, and a force bearing structure of the plate-shaped grid frame is recessed inwards. The method is mainly used in the aerospace field.

The application discloses a light and small lens anti-large impact design method, which comprises the following steps: a lens group in a main bearing lens barrel is divided into multiple sections, and a pressing ring is used to press and fix the lens group; the main bearing lens barrel is provided with glue injection holes in the area of each section of the lens group, optical glue is injected to the non-working surface of the optical lens part through the glue injection holes; and glue flow grooves are arranged around the inner wall of the cylinder of the main bearing lens barrel which is matched with each section of the lens group, the glue flow grooves are communicated with the glue injection holes, and the optical lens part is stable and firm in the main bearing lens barrel. In the centering processing of the optical lens part, stress-free assembly is realized. Through the system engineering idea of "strengthening, buffering and protecting", the application overcomes the problems that the lens is broken and the optical axis is deviated due to the lens delamination, displacement or loosening of the lens under the extreme physical environment, and guarantees the reliability and imaging quality of the core optical system under the extreme physical environment.