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

CN102168738BInactive Publication Date: 2012-11-21BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-11-21
Estimated Expiration
Not applicable · inactive patent

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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 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.
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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...

Examples

Embodiment Construction

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

[0039] The present invention is 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 in a two-by-two symmetrical layout with M5×8 screws. As shown in Figure 1, there are two assembly methods according to the connection with the controlled structure: the internally connected controlled structure of Figure 1(a) and the externally controlled structure of Figure 1(b).

[0040] Such as figure 2 , image 3 As shown, the middle of the 6 faces of the bracket is provided with two M5 connecting holes 1A symmetrically distributed; wherein the connecting holes 1A on each face of the bracket and the connecting holes 2B of the singl...