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Design method of turn number of electromagnetic coil of automotive magneto-rheological semi-active suspension

A semi-active suspension and electromagnetic coil technology, which is applied in vibration suppression adjustment, non-rotational vibration suppression, etc., can solve the problem of failing to provide reliable automotive magnetorheological semi-active suspension electromagnetic coils.

Inactive Publication Date: 2013-08-14
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many vehicle suspension research experts at home and abroad have done a lot of research on automotive magneto-rheological semi-active suspension, due to the constraints of the optimal damping ratio of the semi-active suspension system, they have not been able to give a reliable automotive magneto-rheological suspension. The design method of semi-active suspension electromagnetic coils, according to the research data, the current domestic and foreign research on automotive magneto-rheological semi-active suspension systems is mostly focused on the research of control strategies and control methods, while for the number of turns of electromagnetic coils N , but mostly through trial and error, the number of turns of the electromagnetic coil is finally determined N The parameter design value of

Method used

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  • Design method of turn number of electromagnetic coil of automotive magneto-rheological semi-active suspension
  • Design method of turn number of electromagnetic coil of automotive magneto-rheological semi-active suspension
  • Design method of turn number of electromagnetic coil of automotive magneto-rheological semi-active suspension

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Effect test

Embodiment 1

[0028] Embodiment 1: The structural principle of the magneto-rheological shock absorber of a semi-active suspension of an automobile, such as figure 1 As shown, the shock absorber piston cylinder 1, the piston 2, the electromagnetic coil 3, and the piston rod 4, wherein the electromagnetic coil 3 is embedded in the middle of the piston, and its number of turns N It is the key design parameter of the magneto-rheological shock absorber of the semi-active suspension. The sprung mass of the car's single-wheel suspension m 2 =300kg, suspension stiffness k 2 =13057N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; the inner diameter of the piston cylinder of the magneto-rheological shock absorber is D H =28mm, piston rod diameter d g =18mm, the annular gap between the piston and the inner cylinder h =0.9mm, piston length L =40mm; Suspension leverage ratio i= 0.9, installation angle of shock absorber =10°, the maximum speed of the shock absorberV max =1.0m...

Embodiment 2

[0044] Embodiment 2: The sprung mass of a certain automobile single-wheel suspension m 2 =350kg, suspension stiffness k 2 =16719N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°, the inner diameter of the piston and cylinder of the magneto-rheological shock absorber, the diameter of the piston rod, and the length of the piston are the same as those in Embodiment 1, that is, the inner diameter of the piston and cylinder is D H =28mm, piston rod diameter d g =18mm, piston length L =40mm; the annular gap between the piston and the cylinder h =0.8mm; the maximum speed of the shock absorber V max = 1.0m / s; the initial viscosity of the magnetorheological fluid is 0.8Pa.s, and the magneto-induced shear stress coefficient =0.0015, magnetic field strength index =1.6; the maximum control current of the electromagnetic coil I max =2.0A. Turns of magneto-rheological shock absorber ...

Embodiment 3

[0060] Embodiment Three: The sprung mass of a certain automobile single-wheel suspension m 2 =400kg, suspension stiffness k 2 =20884N / m, unsprung mass m 1 =40kg, tire stiffness k t =192000N / m; Suspension leverage ratio i= 0.9 and shock absorber installation angle =10°, the inner diameter of the piston cylinder of the magneto-rheological shock absorber is D H =28mm, piston rod diameter d g =20mm, piston length L =40mm; the annular gap between the piston and the cylinder h =0.7mm; the maximum speed of the shock absorber V max = 1.0m / s; the initial viscosity of the magnetorheological fluid is 0.8Pa.s, and the magneto-induced shear stress coefficient =0.0015, magnetic field strength index =1.6; the maximum control current of the electromagnetic coil I max =2.0A. Turns of magneto-rheological shock absorber electromagnetic coil for the semi-active suspension of the car N To optimize the design.

[0061] Using the design steps of Embodiment 1, the number of tu...

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Abstract

The invention relates to a design method of the turn number of an electromagnetic coil of an automotive magneto-rheological semi-active suspension, and belongs to the technical field of dampers. The design method is characterized by comprising the steps that optimal suspension damping ratios based on comfortability and safety are determined respectively according to single-wheel 1 / 4 automobile parameters; the required maximum Coulomb damping force of a semi-active suspension magneto-rheological damper under a condition of the maximum speed is determined according to a suspension lever ratio and a mounting angle of the magneto-rheological damper; and an optimal design is conducted on the turn number N of the electromagnetic coil of the automotive magneto-rheological semi-active suspension according to relations among the Coulomb damping force, a structure parameter and a magneto-rheological liquid characteristic parameter of the damper, and the maximum control current Imax. A reliable design value of the turn number N of the electromagnetic coil can be obtained with the adoption of the design method of the turn number of the electromagnetic coil; a design level, the design level, the quality and the performances of a magneto-rheological semi-active suspension system are raised and improved; a design requirement of ensuring the traveling smoothness of an automobile under the condition of the maximum control current is met; and the design and testing expenses can be lowered.

Description

technical field [0001] The invention relates to a magneto-rheological semi-active suspension system, in particular to a design method for the number of turns of an electromagnetic coil of an automobile magneto-rheological semi-active suspension. Background technique [0002] The magneto-rheological shock absorber can control the damping force 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. It has become the current domestic and foreign vehicle semi-active A hot spot in the field of suspension research. Electromagnetic Coil Turns N and current I The size of the MR shock absorber determines the damping characteristics of the magneto-rheological shock absorber and the damping matching of the semi-active suspension system, which has an important impact on the ride comfort of the car. Although many vehicle suspension research experts ...

Claims

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Application Information

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IPC IPC(8): F16F9/53
Inventor 周长城李红艳赵雷雷
Owner SHANDONG UNIV OF TECH
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