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

A technology of dynamic vibration absorption and dynamic vibration absorber, which is applied in the direction of magnetic spring, non-rotational vibration suppression, spring, etc., can solve the problems of inability to effectively suppress multi-degree-of-freedom vibration of flexible structures, narrow vibration suppression bandwidth, and limited vibration suppression effect. Achieve the effects of reduced design weight, fast response and good reliability

Inactive Publication Date: 2011-08-31
BEIHANG UNIV
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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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  • Six-degree-of-freedom active and passive dynamic vibration-absorbing device

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] The invention provides a six-degree-of-freedom active and passive dynamic vibration absorbing device, which includes a support 1 and six single-degree-of-freedom dynamic vibration absorbers 2 . Among them, the six single-degree-of-freedom dynamic vibration absorbers 2 are fixedly connected with the three vertical connection holes of the bracket 1 with M5×8 screws in a symmetrical layout. As shown in Figure 1, there are two assembly methods according to the connection with the controlled structure: the internal controlled structure in Figure 1(a) and the external controlled structure in Figure 1(b).

[0040] Such as figure 2 , image 3 As shown, two M5 connection holes 1A in symmetrical distribution are arranged in the middle of the six surfaces of the support; the connection holes 1A on each surface of the support and the connection hole 2B of the single-degre...

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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 a hollow 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 vibration suppression 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 dynamic vibration-absorbing device. Background technique [0002] In the field of aerospace, engineering units usually design products with lightweight and flexible structures such as trusses to reduce the overall weight of the product. However, such structural components are prone to resonance due to external disturbances, making the payload mounted on the structure unable to work normally. Therefore, research and development of vibration control devices for this type of structure has become an urgent problem to be solved. [0003] Vibration control of lightweight flexible structures is mainly divided into active and passive control methods. The passive method has a simple structure, but its frequency band and suppression ability to structural vibration are limited; while the active control method is far superio...

Claims

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Application Information

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IPC IPC(8): F16F15/03F16F6/00
Inventor 崔龙杨恺黄海梁鹏
Owner BEIHANG UNIV
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