4 results about "Isolator" patented technology

The invention provides a microwave ferrite material, a preparation method thereof and a microwave communication device. The chemical formula of the microwave ferrite material is Y2.95-xBi0.05CaxNi0.02SnxFe4.87-xO12, wherein x is greater than or equal to 0.05 and less than or equal to 0.15. The preparation method comprises the following steps: preparing raw materials according to a stoichiometric ratio that the molecular formula is Y2.95-xBi0.05CaxNi0.02SnxFe4.87-xO12 and x is more than or equal to 0.05 and less than or equal to 0.15, and preparing the microwave ferrite material from the raw materials. The microwave ferrite material 4pi Ms is controlled to be 1750-1850 Gs, has the advantages of small line width and low loss, and can well meet the application requirements of microwave circulators and isolators.

The invention discloses a space six-degree-of-freedom non-contact vibration isolation platform for aerospace, comprising a base, a working platform, and first to fourth electromagnetic vibration isolators arranged between the base and the working platform; each The vibration isolators can achieve vibration isolation in the x and y directions in the plane. The four vibration isolators are evenly distributed on the four sides of the base. The platform has low natural frequencies in the six degrees of freedom, which can effectively suppress the vibration of the six degrees of freedom Low frequency micro vibration. The present invention is applicable to the vibration isolation of equipment in the field of aerospace precision instruments. When the platform base is disturbed and vibrations are generated in six degrees of freedom, these vibrations can only be transmitted to the precision load through the vibration isolation platform, while the platform Its own stiffness is extremely low, which greatly reduces the disturbance of precision loads.

The invention belongs to the field of mechanical vibration control, and aims to provide an insect-imitating low-frequency vibration isolation structure. According to the structure, the bearing capacity and rigidity of the vibration isolator can be adjusted, and broadband and low-frequency vibration isolation can be achieved through nonlinear rigidity and damping. According to the technical scheme, the insect-imitating low-frequency vibration isolation structure is characterized in that the low-frequency vibration isolation structure comprises an upper base plate and a lower base plate which achieve relative movement in the vertical direction through a vertical direction guide structure, a serial rhombic structure arranged between the upper base plate and the lower base plate and used for applying a restoring force, and a horizontal direction guide structure connected to the serial rhombic structure in series so as to increase the non-linear inertia force and the non-linear damping force to the upper base plate and the lower base plate.