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Rigidity-variable full-automatic power vibration-absorber

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

Inactive Publication Date: 2007-10-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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

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Embodiment 1

[0033] The variable stiffness fully active dynamic vibration absorber includes an actuator 16, a control unit 11, and a sensor 14. The vibration absorber control unit 11 includes a charge amplifier 10, a power amplifier 12, and a data acquisition and processing system 13, as shown in FIG. 1 .

[0034]As shown in Fig. 2 and Fig. 4, the executive components of the electric 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; body 5; base 6; capacitor pole plate 8 connected to the moving mass for providing active force; capacitor pole plate 7 connected to the damping object for providing active force; excitation coil 21; bearing 24; outer ring guide Magnetic ring 25; Shaft coupling 26 is formed. 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...

Embodiment 2

[0039] As shown in Figure 3 and Figure 4, the executive parts 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; Body 5; base 6; energized coil 20 connected to the moving mass block for providing active force; energized coil 19 connected with the vibration reduction object for providing active force; excitation coil 21; bearing 24; outer ring magnetic conduction Ring 25; Coupling 26 is formed. 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 elastomer 5 connects t...

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Abstract

The present invention relates to a variable rigidity initiative power absorber applied to vibration damping for machinery, electrical equipment and noise control. The fault that the control band width of the passive control type absorber is too narrow, the control energy needed by initiative control type absorber is excessive and the vibration absorption effect of semi- initiative control type absorber is insufficient is solved. The structure feature of the absorber is that: an execution unit includes a base frame, the top of the base frame is disposed with a pair of base seats, the base seats are disposed with annular guide rods, and the two sides of the opening of the annular guide rod are respectively connected with magnetic current variable elastic bodies, the annular guide rods are connected with movable mass blocks, power mechanisms are disposed at the lower part of the power mass blocks. The invention has good vibration absorption effect, wide oscillation damping frequency band, less consume energy, the input energy is less than the initiative control absorber, therefore, the stability is better than the initiative control absorber; the absorber is simple in structure, easy in control method, and high in system reliability.

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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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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