A variable stiffness magnetorheological damper and its control method

Abstract

The invention relates to a variable stiffness magnetorheological damper and a control method thereof. The variable stiffness magnetorheological damper comprises an inner damper body and an outer damper body which are movably connected in an inner-outer mode and further comprises a spring. One end of the spring is fixed to a supporting seat, and the other end of the spring is fixed to an outer cylinder barrel of the outer damper body. One end of an inner cylinder barrel of the inner damper body extends into a cylinder body of the outer cylinder barrel of the outer damper body and is fixedly connected with an outer piston of the outer damper body, and the other end of the inner cylinder barrel of the inner damper body is connected with an outer load part. The variable stiffness magnetorheological damper and the control method thereof have the beneficial effects that the inner damper body and the outer damper body are combined, the outer piton and the inner cylinder barrel are integrated, and output force is formed by connecting two parts in parallel so that the maximum output force and power adjustable coefficient of the damper can be increased; and the structure is more compact, the length of the damper is greatly decreased, and the damper is suitable for more occasions with requirements for mounting spaces and damping occasions needing stiffness and damping force variation.

Description

technical field [0001] The invention relates to a control method of a magneto-rheological damper with variable stiffness. Background technique [0002] As a functional material, magnetorheological fluid (MRF) is reversible and controllable, and its thermal stability, wide operating temperature range, and fast response can fully meet the requirements of engineering applications. Therefore, magnetic Rheological fluids are widely used in the research of new mechanical devices, such as clutches, brakes, shock absorbers, polishing devices, etc., and have good application prospects in the fields of vehicle engineering, mechanical engineering, civil engineering, and aerospace. [0003] Magneto-rheological fluid dampers are the most concentrated and fastest-growing application fields of MRF research. The magnetorheological damper is to control the viscosity of the damping fluid in the damper by controlling the rheological characteristics of the magnetorheological fluid, thereby con...

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Problems solved by technology

Experiments show that this mechanism has the performance of variable stiffness and variable damping, but the system is bulky and not an independent damping device, so engineering application is very difficult

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