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Analytical calculation method for magnetorheological liquid viscosity of vibration absorber at different temperatures

A technology of liquid viscosity and shock absorber, which is applied in the field of analysis and calculation of magnetorheological fluid viscosity in shock absorbers, and can solve problems such as difficult measurement of magnetorheological fluid viscosity

Inactive Publication Date: 2013-08-07
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the simple, accurate and reliable viscosity of magnetorheological fluids has not been given at home and abroad. mu 0 Most of the analysis and calculation methods need to use special instruments or devices to determine the viscosity of magnetorheological fluids at room temperature. mu 0 measurement, and it is difficult to measure the viscosity of magnetorheological fluids at different temperatures

Method used

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  • Analytical calculation method for magnetorheological liquid viscosity of vibration absorber at different temperatures
  • Analytical calculation method for magnetorheological liquid viscosity of vibration absorber at different temperatures
  • Analytical calculation method for magnetorheological liquid viscosity of vibration absorber at different temperatures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: The schematic diagram of the damping characteristic test bench and the temperature control box of the shock absorber at different temperatures, such as figure 2 As shown, the bench 1 of the shock absorber test bench, the temperature control box 2, the tested shock absorber 3, the hydraulic actuator 4, the temperature control box support bracket 5, and the installation base of the shock absorber test bench, wherein, The internal temperature of the temperature control box 2 is controlled by liquid nitrogen or a heater and a computer to maintain the set temperature of the temperature control box 2; the actuator 4 is controlled by a certain amplitude A and frequency through the MTS controller and hydraulic servo system. f Harmonic displacement of x Get some exercise. The displacement of the shock absorber is measured by displacement and force sensors x i and the corresponding damping force F d . Schematic diagram of the piston, cylinder and piston of a ...

Embodiment 2

[0039] Embodiment 2: The structural parameters of a magnetorheological shock absorber and the magnetorheological fluid used are exactly the same as those of Embodiment 1, except that the temperature of the temperature control box controlled during the test T =0°. Maximum test speed for magnetorheological shock absorbers V max =1.0m / s, at control current I = 0A, carry out the damping characteristic test of the magnetorheological shock absorber, and analyze and calculate the viscosity of the magnetorheological fluid in the case of the shock absorber at 0° mu 0 .

[0040] Adopt the technical scheme implementation step of embodiment one, the viscosity of the magnetorheological fluid under 0 ° situation to this shock absorber mu 0 Perform analytical calculations, namely:

[0041] (1) temperature T The damping characteristic test of the lower magneto-rheological shock absorber without applying control current:

[0042] Because the maximum speed of shock absorber test test i...

Embodiment 3

[0052] Embodiment 3: The structural parameters of a magnetorheological shock absorber and the magnetorheological fluid used are exactly the same as those in Embodiment 1, except that the temperature of the temperature control box is controlled during the test T =-20°. Maximum test speed for magnetorheological shock absorbers V max =1.0m / s, at control current I = 0A, carry out the damping characteristic test of the magnetorheological shock absorber, and analyze and calculate the viscosity of the magnetorheological fluid under the temperature of the shock absorber at -20° mu 0 .

[0053] Using the implementation steps of the technical scheme of Embodiment 1, the viscosity of the magnetorheological fluid under the condition of -20° for the shock absorber mu 0 Perform analytical calculations, namely:

[0054] (1) temperature T The damping characteristic test of the lower magneto-rheological shock absorber without applying control current:

[0055] Because the maximum spee...

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Abstract

The invention relates to an analytical calculation method for the magnetorheological liquid viscosity of a vibration absorber at different temperatures, which belongs to the field of vibration absorbers. Currently, an easy and reliable method has not been brought forward for calculation of magnetorheological liquid viscosity, a special-purpose test instrument or equipment is adopted on most occasions, and only a viscosity parameter value at normal temperature can be measured. The invention is characterized in that conventional vibration absorber characteristic testing equipment and a conventional temperature control box are utilized for analytical calculation of the viscosity mu 0 of magnetorheological liquid used in the vibration absorber through damping characteristic test and test values of the vibration absorber at different temperatures based on structure parameters of the vibration absorber. According to the method, purchase expense for test instruments is lowered down, the obtained viscosity value mu 0 of the magnetorheological liquid better reflects physical truth, a foundation is laid for establishment of an accurate and reliable magnetorheological vibration absorber parameter design and characteristic simulation model, the design level, the quality and the performance of the vibration absorber can be further improved, and ride performance of a vehicle is enhanced.

Description

technical field [0001] The invention relates to a magnetorheological shock absorber, in particular to a method for analyzing and calculating the viscosity of the magnetorheological fluid of the shock absorber at different temperatures. Background technique [0002] The magneto-rheological shock absorber can control the damping force of the shock absorber by controlling the magnitude of the current. It has the characteristics of fast response, low power consumption, large adjustment range, etc., and the working conditions are relatively simple. At present, domestic and foreign automobile suspension A hotspot in the field of frame research. The damping force of the magnetorheological shock absorber is composed of viscous damping force and Coulomb damping force, and the viscous damping force can be expressed as ,in, mu 0 That is the viscosity of the magnetorheological fluid (Pa.s). It can be seen that the viscous damping force of the magnetorheological fluid is not only a...

Claims

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Application Information

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IPC IPC(8): G01N11/00
Inventor 周长城李红艳汪晓
Owner SHANDONG UNIV OF TECH
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