Actuator based on magneto-rheological fluid

Abstract

The invention discloses an actuator based on magneto-rheological fluid. The actuator includes a dynamic platform and a static platform which are oppositely arranged, a driving member is connected between the dynamic platform and the static platform, the driving member includes a flexible pipe and the magneto-rheological fluid contained in the flexible pipe in a filling manner, the static platformis provided with a magnet exciting coil, the magneto-rheological fluid drives the flexible pipe to deform together under the effect of magnetic fields generated by the magnet exciting coil so as to drive the dynamic platform to be far away from or close to the static platform, the magneto-rheological fluid has different characteristics under different conditions of the magnetic fields and is usedas a driving element of the actuator, the magnetic fields with different strengths are applied to the magneto-rheological fluid, and therefore accurate output is realized; and in cooperation with multiple driving parts, the requirement of multi-angle driving can be met, and the advantages of being good in temperature stability, high in corresponding speed and high in accuracy are achieved.

Description

technical field [0001] The present application relates to a magnetorheological fluid based actuator. Background technique [0002] With the increasing demand for high-precision mechanical systems in high-tech fields such as aerospace, microelectronics, and biomedicine, precision mechanical systems have received extensive attention. As the core components of precision mechanical systems, micro-actuators play a vital role. The current micro-actuators mainly include magnetostrictive and piezoelectric ceramic micro-feeding methods. [0003] The inventors have found that there are different defects when the micro-driver is working. The magnetostrictive drive is limited by the temperature due to the strain of the magnetostrictive material. Generally, it can only be used at room temperature or above room temperature to exert its effect. In some harsh environments The scene is greatly affected by temperature, and it is difficult to maintain its driving accuracy in real time; piezo...

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Problems solved by technology

[0003] The inventors have found that there are different defects when the micro-driver is working. The magnetostrictive drive is limited by the temperature due to the strain of the magnetostrictive material. Generally, it can only be used at room temperature or above room temperature to exert its effect. In some harsh environments The scene is greatly affected by temperature, and it is difficult to maintain its driving accuracy in real time; piezoelectric ceramics are prone to fatigue due to the mechanical stress of the material, and as the use time prolongs, it will lead to insufficient driving accuracy; and, the current The driving force of the micro-driver is fixed. With the diversification of precision mechanical systems, there are other special driving requirements, such as the change of driving force and driving angle. However, it is difficult for the current micro-driver to realize the change of the driving force with the change of displacement. , it is also difficult to meet the requirements of some working elements that require different output angles

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