Six-degree-of-freedom active and passive dynamic vibration-absorbing device

Abstract

The invention discloses a six-degree-of-freedom active and passive dynamic vibration-absorbing device, which comprises a bracket and six single degree-of-freedom dynamic vibration absorbers, wherein the six single degree-of-freedom dynamic vibration absorbers are in pairwise symmetrical arrangement, and are fixedly connected with three vertical directions of the bracket via bolts respectively; and the vibration absorbers are connected with a controlled structure in two ways, namely, the vibration absorbers are connected internally and externally with the controlled structure. The bracket is ahollow metal framework connected by six crosses into a cube; each single degree-of-freedom dynamic vibration absorber comprises an end cover, a shell, a coil sleeve, a motor rotor, a diaphragm spring, an M4 nut and an M3 bolt. The six-degree-of-freedom active and passive dynamic vibration-absorbing device is installed on the surface of the controlled structure, has six-degree-of-freedom vibrationsuppression capability and active and passive control modes, is flexible and easy to control, fast in response speed and good in reliability, and is adapted to the complex vibration suppression working condition with multiple degree-of-freedom. The device has higher practical value and wide application prospect in the technical field of aviation and aerospace.

Description

Technical field [0001] The invention belongs to the technical field of precision machinery, and specifically relates to a six-degree-of-freedom active and passive power vibration absorbing device. Background technique [0002] In the aerospace field, engineering units usually design products with light and flexible structures such as trusses to reduce the overall weight of the products. However, this kind of structural components are susceptible to external interference and resonate, making the payload installed on the structure unable to work normally. Therefore, research and development of vibration control devices for this type of structure becomes an urgent problem to be solved. [0003] The vibration control of the light and flexible structure is mainly divided into two control methods: active and passive. The passive method has a simple structure, but has limited frequency bands and suppression capabilities for structural vibration; while the active control method has far b...

AI Technical Summary

Problems solved by technology

However, most of the traditional dynamic vibration absorbing devices are single-degree-of-freedom passive vibration-absorbing devices, the vibration suppression effect is limited and the vibration suppression bandwidth is narrow, and the multi-degree-of-freedom vibration of flexible structures cannot be effectively suppressed.

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