Damping-adjustable vibration isolation platform with quasi-zero stiffness

Abstract

The invention discloses a damping-adjustable vibration isolation platform with quasi-zero stiffness. The damping-adjustable vibration isolation platform comprises a bearing assembly, a fixed platform frame and damping assemblies. The bearing assembly is used for bearing vibration isolation objects. The fixed platform frame is provided with an open end and a cavity which is communicated with the open end, and the bearing assembly and the damping assemblies are contained in the cavity. The damping assemblies comprise the damping-adjustable upper damping assembly and the damping-adjustable lower damping assembly which are arranged in the cavity in the longitudinal direction, and the bearing assembly is connected with the fixed platform frame through the upper damping assembly and the lower damping assembly. The vibration isolation platform solves the difficulty existing when a traditional linear vibration isolation system isolates low frequency or ultra-low frequency vibration, and also overcomes the defects that an active or semi-active control vibration isolation device is complex in structure, high in manufacturing cost, high in energy consumption and the like; the vibration isolation platform is simple in structure, applicable to wide-frequency-domain vibration isolation, capable of being widely applied to precise equipment with strict vibration isolation requirements and has good engineering adaptability. Besides, damping is simple and convenient to adjust.

Description

technical field [0001] The invention relates to a quasi-zero stiffness damping adjustable vibration isolation platform suitable for low frequency or ultra-low frequency vibration isolation; the vibration isolation platform can be widely used in the processing of automobiles, ships, aircraft, aerospace vehicles, precision instruments, and precision machine tools Buffer vibration isolation in other fields. Background technique [0002] In traditional passive vibration isolation systems, the external excitation frequency is greater than the natural frequency of the vibration isolation system itself. times, in order to play a role in vibration isolation. This vibration isolation system can better isolate the excitation frequency greater than times the natural frequency of the system, but the isolated excitation frequency is less than The low-frequency vibration, especially the ultra-low frequency vibration, which is twice the natural frequency of the system is poor. In or...

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Problems solved by technology

Although the existing active active vibration isolation and semi-active vibration isolation can effectively isolate low-frequency ...

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