Self-powered and self-sensing magnetorheological (MR) fluid damper

A self-sensing and damper technology, used in shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems of increasing the installation space, weight and cost of MR systems, reducing system reliability, etc. and weight reduction, improved reliability, low maintenance

Active Publication Date: 2012-03-14
THE CHINESE UNIVERSITY OF HONG KONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additional dynamic sensors increase the installation space, weight and cost of the MR system
In addition, sepa

Method used

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  • Self-powered and self-sensing magnetorheological (MR) fluid damper
  • Self-powered and self-sensing magnetorheological (MR) fluid damper
  • Self-powered and self-sensing magnetorheological (MR) fluid damper

Examples

Experimental program
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Embodiment Construction

[0030] Embodiments of the present application will be described below with reference to the accompanying drawings.

[0031] figure 2 A self-powered, self-sensing MR damper 79 according to one embodiment of the application is shown. As shown, the MR damper 79 has a single-ended MR damper structure comprising a multi-pole generating element with slots. The damper 79 performs the sensing function by utilizing a speed extraction algorithm that extracts speed information from the signal of the power generating component. This means that the sensing part of the MR damper 79 shares the same mechanical component as the generating part of the MR damper 79 .

[0032] like figure 2 As shown, MR damper 79 includes electrical components 76 and mechanical components 78 . The mechanical part 78 will be described first below.

[0033] refer to image 3 , in which a mechanical component 78 according to one embodiment of the application is shown. Mechanical components 78 may include MR...

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PUM

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Abstract

The invention discloses a self-powered and self-sensing magnetorheological (MR) fluid damping device, which comprises an MR damper component, a generating component, a control unit and a sensing component, wherein the MR damper component is provided with a damper piston assembly and a damper cylinder; the damper piston assembly can shift relative to the damper cylinder under external excitation; the generating component is used for generating a voltage signal according to the shift of the damper piston assembly; the control unit is used for estimating the shifting speed according to the generated voltage signal, and outputting damping drive current based on the estimated speed; the sensing component is provided with at least one coil for generating MR fluid field strength; and the sensing component is used for receiving the damping drive current to change the field strength, and thereby, the MR damper component is controlled to provide an adjustable damping force.

Description

technical field [0001] The present application relates to self-powered, self-sensing magneto-rheological (MR) damping devices and to methods for extracting relative velocity information from voltages of generator components in MR damping devices. Background technique [0002] Vibration control is critical to today's fast-moving powertrains. In magnetic field applications, magnetorheological (MR) fluids are smart materials capable of a rapid, reversible, and tunable transition from a free-flowing state to a semi-solid state within milliseconds. Because MR fluids provide a simple and fast-response interface between electronic controls and mechanical devices / systems, MR fluids are highly promising for semi-active vibration control. The advantages of MR dampers are very attractive, such as controllable damping force, wide operating temperature range, fast response and low energy consumption. [0003] figure 1 A typical MR damper based on a semi-active control system is shown....

Claims

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Application Information

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IPC IPC(8): F16F9/53
CPCF16F9/53
Inventor 廖维新陈超
Owner THE CHINESE UNIVERSITY OF HONG KONG
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