Calculation method of zero-field, field-field damping force coefficient and damping force of parallel normally through-hole magneto-rheological damper

Abstract

The invention discloses a method for calculating the zero-field and field-field damping force coefficients and damping force of a parallel normally through-hole magneto-rheological damper. The calculation method of the zero-field damping force coefficient of the magneto-rheological damper of the present invention is based on the first pressure difference coefficient C 1 , the second differential pressure coefficient C 2 Find that the field damping force coefficient of the magnetorheological damper of the present invention is based on the first differential pressure coefficient C 1 obtain, and the damping force calculation method of the present invention is based on the zero-field damping force coefficient and the field damping force coefficient calculation method of the magnetorheological damper of the present invention to determine the zero-field damping force coefficient and the field damping force coefficient. The whole obtaining process is simple, uncomplicated and fast, and the control of the damping force can be quickly realized.

Description

technical field [0001] The invention relates to a method for obtaining the zero-field damping coefficient, the field damping coefficient and the damping force of a magnetorheological damper with parallel normally through holes, and belongs to the technical field of semi-active control of structural magnetorheological vibration. Background technique [0002] Magnetorheological fluid is a kind of intelligent material sensitive to magnetic field. With the loading or withdrawal of external magnetic field, magnetorheological fluid converts between non-Newtonian fluid and Newtonian fluid. This conversion is reversible and continuous. The magnetorheological fluid has a large shear yield strength and fast response. The magnetorheological damper based on it is an ideal variable damping device and is widely used in structural vibration in vehicle engineering, weapon systems, civil engineering, aerospace and other fields. semi-active control. [0003] The existing magnetorheological d...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the reverse mechanical model and control process of the existing magneto-rheological damper are complicated and difficult to apply to engineering practice, and propose a parallel normally through-hole magneto-rheological damper with parallel normally When the magneto-rheological damper with the through hole is zero, the magneto-rheological fluid flows through the through-hole and the annular damping channel, realizing the minimum damping force, which corresponds to the zero-field damping force coefficient. When the current is loaded to the maximum value, the annular damping channel is blocked by the rheological effect of the magnetorheological fluid and acts as a pressure limiting valve. Before the magnetorheological fluid yields, the magnetorheological fluid only flows through the normal through hole. The maximum damping force is achieved, which corresponds to the field damping force coefficient. Therefore, the magnetorheological damper only needs to switch between zero current and maximum current value according to the switch control strategy, so as to avoid the establishment of complex reverse mechanics The model and the solution to the model greatly simplify the control process

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