Direct-acting rigidity-controllable magneto-rheological fluid damper

Abstract

The invention relates to a direct-acting magneto-rheological fluid shock absorber with controllable stiffness, which belongs to the technical field of vibration control. The shock absorber includes the controlled object and the magnetorheological fluid shock absorber, wherein the controlled object is the vibration control object, and the magnetorheological fluid shock absorber is composed of a support plate, a slide rail, a slider, a connecting plate, a lock nut, Gasket, piston rod, upper piston, outer sleeve, excitation coil, inner sleeve, damping channel, magnetorheological fluid, lower piston, floating piston, nitrogen chamber and working cylinder. The stiffness of the magnetorheological fluid in the magnetorheological fluid damper can be controlled by changing the current of the excitation coil, so as to meet the internal resonance requirements between the controlled object and the magnetorheological fluid damper in the system. The damping consumes vibration energy to achieve the purpose of vibration reduction. The invention utilizes the internal resonance phenomenon for vibration reduction, has obvious vibration reduction effect, strong robustness and less energy consumption, and has good practical value in the vibration reduction of vehicle engines, flexible mechanical arms and other fields.

Description

technical field [0001] The invention relates to a magneto-rheological fluid shock absorber based on controllable stiffness, which constructs the shock absorber based on magneto-rheological fluid technology from a nonlinear point of view, so that internal resonance occurs in the system composed of the controlled object and the shock absorber , and form an energy exchange channel, transfer the vibration energy of the controlled object to the vibration damping device and dissipate it by damping, which belongs to the technical field of mechanical vibration and precision machinery. Background technique [0002] With the development of the automobile industry in recent years, the requirements for the ride comfort and handling stability of automobiles are getting higher and higher. During the driving process of the car, due to the complexity of its own structure and the influence of external factors, the vibration in the cab is relatively large, which will not only affect the work ...

AI Technical Summary

Problems solved by technology

But in practical problems, there will always be some problems that cannot be solved by linear theory

Generally speaking, the linear model is only suitable for a small range of motion. Beyond this range, dealing with linear problems will not only cause large errors in quantity, but also sometimes qualitative differences, which prompts people to pay attention to nonlinear Vibration theory has been thoroughly studied

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