Nonlinear stiffness vibration-isolation platform for optoelectronic equipment

Abstract

The invention discloses a nonlinear stiffness vibration-isolation platform for optoelectronic equipment, and relates to the technical field of vibration-isolation buffering of the photovoltaic equipment. The vibration-isolation platform is composed of an upper panel, a lower panel, a nonlinear stiffness assembly, an auxiliary stiffness assembly and a vertical guiding assembly; the upper surface ofthe upper panel is fixedly connected with the photovoltaic equipment subjected to vibration isolation, and the lower surface of the lower panel is fixedly connected with a moving carrying platform; the nonlinear stiffness assembly serves as a main force bearing part of the vibration-isolation platform to convert vertical motion into horizontal motion and provide linear restoring force; the auxiliary stiffness assembly achieves the effect of auxiliary support on the load and is used for increasing the bearing capability of the vibration-isolation platform; and the vertical guiding assembly isused for constraining motion loaded by the upper panel and the vibration-isolation platform. Thus the nonlinear stiffness vibration-isolation platform has very low dynamic stiffness while having the large bearing capability, accordingly, the inherent frequency of a system can be decreased significantly, and the very good low-frequency vibration-isolation effect is achieved; and the nonlinear stiffness vibration-isolation platform is suitable for vibration-isolation buffering application of the large-scale photoelectric equipment.

Description

technical field [0001] The invention relates to the technical field of vibration isolation and buffering of optoelectronic equipment, in particular to a nonlinear stiffness vibration isolation platform for optoelectronic equipment. Background technique [0002] The existing optoelectronic equipment mounted on mobile platforms such as ships, airplanes, and automobiles is subjected to a very complex mechanical environment. Under the action of these disturbance excitations, the optoelectronic equipment generates mechanical vibrations, resulting in beam chattering, which affects the beam control, Target capture and tracking and target measurement accuracy have a very negative impact. [0003] The vibration interference received by optoelectronic equipment in actual use has the characteristics of wide excitation frequency band and large vibration amplitude. Traditional passive vibration isolation methods cannot solve the contradiction between the support stiffness and bearing cap...

AI Technical Summary

Problems solved by technology

However, this type of vibration isolator has many disadvantages: first, it requires high assembly accuracy and takes up a large space; The static balance load of the vibrator is the same, otherwise the low-frequency vibration isolation effect will be greatly reduced; finally, there are requirements for the excitation amplitude. When the vibration excitation amplitude is low, the negative stiffness components are not easy to play a role, and the vibration isolator is difficult to perform low-frequency vibration isolation. Effect

[0005] The nonlinear stiffness vibration isolation technology based on the principle of parallel connection of positive and negative stiffness has the above-mentioned limiting factors, so its research stays at the conceptual stage, and its practical application is limited. It is difficult to apply in the field of large-scale optoelectronic equipment vibration isolation

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