Rigidity-variable full-automatic power vibration-absorber

A technology of dynamic vibration absorber and variable stiffness, which is applied to devices for vibration reduction and noise control of electrical equipment, and in the field of machinery. It can solve the problem of insufficient vibration absorption effect of semi-active control vibration absorbers, high control energy, and narrow control bandwidth of passive control vibration absorbers. and other problems, to achieve the effect of easy control method, low energy consumption and small additional mass

Inactive Publication Date: 2009-12-02
UNIV OF SCI & TECH OF CHINA
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings that the control bandwidth of the passive control vibration absorber is too narrow, the control energy required by the active control vibration absorber is too much, and the vibration absorption effect of the semi-active control vibration absorber is insufficient, the invention designs a combination of semi-active control and active control technology. The advantage of fully active variable stiffness dynamic vibration absorber achieves the purpose of obtaining the best vibration absorption effect with less energy in a wide frequency range

Method used

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  • Rigidity-variable full-automatic power vibration-absorber
  • Rigidity-variable full-automatic power vibration-absorber
  • Rigidity-variable full-automatic power vibration-absorber

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The fully active dynamic shock absorber with variable stiffness includes an execution part 16, a control part 11 and a sensor 14, and the shock absorber control part 11 includes a charge amplifier 10, a power amplifier 12 and a data acquisition and processing system 13, see figure 1 .

[0034] Such as figure 2 , Figure 4The executive components of the electric field force-driven rotary fully active dynamic vibration absorber with variable stiffness are composed of a vibration damping object 1; a base frame 2; a moving mass block 3; an annular guide rod 4; a magnetorheological elastomer 5; ; Capacitor pole plate 8 connected to the moving mass for providing active force; Capacitor pole plate 7 connected to the vibration reduction object for providing active force; Exciting coil 21; Bearing 24; Outer ring magnetic ring 25; device 26. The lower end of the base frame 2 is fixed on the damping object 1 with threads, and the upper end of the base frame 2 is connected with...

Embodiment 2

[0039] Such as image 3 , Figure 4 The executive components of the magnetic field force-driven rotary fully active variable stiffness dynamic shock absorber are composed of a vibration damping object 1; a base frame 2; a moving mass block 3; an annular guide rod 4; a magnetorheological elastomer 5; ; The energized coil 20 that is connected to the moving mass block for providing active force; The energized coil 19 that is connected with the vibration reduction object for providing active force; Exciting coil 21; Bearing 24; Outer ring magnetic ring 25; 26 composed. The lower end of the base frame 2 is fixed on the damping object 1 with threads, and the upper end of the base frame 2 is connected with the base 6 with bolts, and the ring guide rod 4 is connected with the base 6 through the bearing 24 so that the ring guide rod 4 can only Rotate around the axis, the outer ring magnetic ring 25 is fixed together with the base 6 through threaded connection, the magnetorheological ...

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Abstract

The invention relates to a fully active dynamic vibration absorber with variable stiffness applied to vibration reduction and noise control of machinery and electrical equipment. It solves the shortcomings of too narrow control bandwidth of the passive control vibration absorber, too much control energy required by the active control vibration absorber and insufficient vibration absorption effect of the semi-active control vibration absorber. The structural features are: the executive part includes a base frame, a pair of bases are arranged on the top surface of the base frame, and a ring-shaped guide rod is arranged on the base. The guide rod is connected with the moving mass block, and the lower part of the moving mass block is provided with a power mechanism. The invention has good vibration absorption effect, wide vibration reduction frequency, less energy consumption, and less input energy than the active control vibration absorber, so the stability is better than the active control vibration absorber; the structure is simple, the control method is easy, and the system reliability is high.

Description

technical field [0001] The invention relates to a device for vibration reduction and noise control of machinery and electrical equipment. Background technique [0002] In the past mechanical and electrical equipment, the vibration of the equipment often caused premature damage to the mechanical and electrical equipment or caused noise pollution to the environment. [0003] As a means of vibration reduction, the existing vibration absorber technology has been developed into vibration reduction technologies including active control type vibration absorber, passive control type vibration absorber and semi-active control type vibration absorber. The passive control vibration absorber has no adjustment ability at all and has certain limitations. It is only suitable for narrow-band vibration control. When the excitation frequency deviates from the natural frequency of the vibration absorber, the vibration reduction effect of the traditional passive vibration absorber will decrease...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/03
Inventor 倪正超邓华夏龚兴龙
Owner UNIV OF SCI & TECH OF CHINA
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