Magnetic flowing deformation elastomer frequency shift type attenuator and control method

Abstract

The inventive vibration absorber comprises an execution unit, a control unit and a sensor. The execution unit consists of a magnetic inductor, a coil, a magnetic rheological elastic body, a vibration-absorbing mass block and a base. The above magnetic inductor consists of inner and outer sleeves, or a U-shaped iron-core and an armature or top and bottom plates and a column iron-core. Between inner and outer sleeves, the U-shaped iron-core and the armature or the top and bottom plates are filled the magnetic rheological elastic bodies. By regulating the voltage on the coil, the rigidity and the elasticity of the magnetic rheological elastic body are regulated to make its vibration frequency change, so as to make the vibration frequency of the vibration absorber execution unit is the same as that of the vibration-damping object.

Description

(1) Technical field: [0001] The invention relates to a vibration damping device and a control method applied to machinery and electrical equipment. (two) background technology: [0002] In the past mechanical and electrical equipment, due to the lack of an effective shock absorption system, the mechanical and electrical equipment were damaged prematurely or caused noise pollution to the environment. [0003] Existing vibration control methods can be divided into active control, passive control, and semi-active control. Passive control has no adjustment ability at all, has its limitations, and is only suitable for narrow-band vibration control. Active control is superior to passive control and can be actively adjusted, suitable for broadband vibration control. However, active control belongs to force control, which needs to directly provide the energy of control force, and the cost is high and the technology is relatively complicated. Semi-active control belongs to paramet...

AI Technical Summary

Problems solved by technology

However, the traditional passive vibration absorber has many shortcomings, such as the control frequency band is very narrow and cannot be adjusted, so it can only reduce the vibration of a steady-state vibration with a fixed excitation frequency. When the excitation frequency deviates a little, the vibration reduction effect will be sharp deteriorating, or even worse

And increasing the bandwidth will make it unwieldy etc.

[0004] The vibration absorbing device mentioned in the invention patent of application number 96107066.8 is designed using the principle of a passive vibration absorber. Due to the narrow bandwidth of vibration reduction, it can only be solved by increasing the damping or the weight of the shock absorber and using multiple vibration reduction weights. , but increasing the damping will reduce the vibration damping effect, and increasing the mass and number of vibration damping weights will make the shock absorber bulky. In addition, this method has a very limited increase in the vibration damping bandwidth, generally only a few hertz

In addition, the invention patent with application number 02131043.2 mentions an active magneto-rheological fluid damping vibration absorber and its installation method, which can use linear motors, metal springs and magnetorheological fluid dampers to actively change parameters such as system control force and damping To achieve the purpose of "best tuning", but this control method is complicated, because it needs to drive the linear motor, it will consume more energy, and according to the principle of the vibration absorber, changing these parameters has no significant impact on the characteristics of the vibration absorber

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