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Magneto-rheologic damping control method

A magnetorheological damping and control method technology, applied in vibration suppression adjustment, non-rotational vibration suppression, etc., can solve the problems of magnetorheological damping devices such as large volume and weight, no breakthrough research progress, and difficulty in meeting the requirements. Compact, well-cushioned, fast-response effect

Active Publication Date: 2008-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical coil and external power supply make the magnetorheological damping device bulky and heavy. In the field of aerospace structures that have strict requirements on weight and energy, the application of magnetorheological dampers has not yet made breakthrough research progress; The response time of the rheological fluid is milliseconds, but the total response time of the magnetorheological damper is limited by the rise time of the electromagnetic field τ=L / R (L is the inductance of the coil, R is the resistance of the coil), generally in the range of 10 to 100 In the range of milliseconds, it is difficult to meet some occasions that require fast response

Method used

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Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: This magneto-rheological damping control method: use giant magnetostrictive materials, permanent magnets and yokes at both ends to form an input magnetic circuit, and use permanent magnets, yokes, magnetorheological media and soft magnets to form an output magnetic circuit .

Embodiment 2

[0015] Embodiment 2: Before the method in Embodiment 1, add the step of loading an external load on the giant magnetostrictive material in advance.

Embodiment 3

[0016] Embodiment 3: Before the method in embodiment 1, add a step of winding a coil on the giant magnetostrictive material, and the coil is connected to a circuit composed of a capacitor and a resistor in series.

[0017] When an external load is applied to the giant magnetostrictive material, its internal magnetic domain deflects in a direction perpendicular to the direction of the applied force, resulting in a decrease in its internal magnetization, so the magnetic flux of the output magnetic circuit decreases, because the total magnetic flux remains unchanged , so the magnetic flux input to the magnetic circuit increases, and the damping of the magnetorheological medium increases under the action of the magnetic field, and the greater the load, the greater the increase in the magnetic flux input to the magnetic circuit, and the greater the damping force of the magnetorheological medium. Therefore, the above method has its own advantages. Characterized by adaptability, the n...

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Abstract

The invention relates to an application field of magnetorheological damping, and provides a control method for magnetorheological damping, which is characterized in that: an input magnetic loop is formed by adopting a giant magnetostrictive material, a permanent magnet and magnetic yokes at both ends; an output magnetic loop is composed of a permanent magnet, a magnetic yoke and a magnetorheological medium. The control method can dispense with coil and exterior power supply, and the conversion from the controlled structure vibration mechanical energy to magnetic field energy can be achieved only by using less materials; thereby the control method for magnetorheological damping has the advantages of non-energy device, large load, great damping force, rapid response, broadband and better buffering to the impact load.

Description

technical field [0001] The invention relates to the field of applying magneto-rheological damping technology. Background technique [0002] Magnetorheological damping technology is to use the magnetorheological effect (Magnetorheological Effect) to achieve damping. The magnetorheological damping device made by utilizing the magnetorheological effect has the functions of rapid response, easy control, low energy consumption and large damping force. It has been widely used in vehicle suspension systems, building structures (such as bridges, dams, high-rise buildings, etc.), brakes and clutches, recoil control of naval guns in military equipment, and vibration reduction of helicopter rotors. Active and semi-active control of vibrating structural systems. [0003] Currently available magneto-rheological effect technology requires an external magnetic field to function. Electromagnet principles (such as solenoid coils) are used to obtain the required controllable magnetic field,...

Claims

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Application Information

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IPC IPC(8): F16F9/53F16F15/03
Inventor 唐志峰吕福在项占琴
Owner ZHEJIANG UNIV
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