Flexible material reciprocating multilayer structure actuator and method based on inverse flexoelectricity

Abstract

A flexible material reciprocating multi-layer structure actuator and method based on inverse flexoelectricity, the actuator includes a controller, a high-voltage power supply electrically connected to the controller, and a flexoelectric layer composed of multiple layers of flexible film-like materials reciprocatingly stacked Type semi-semi-circular actuating structure, in the actuating structure, electrodes close to the upper and lower surfaces of the single-layer material film are embedded with electrodes that can be bent and stretched in a large range, and the electrodes are electrically connected to the high-voltage power supply. The flexoelectric effect will produce bending deformation radially inward along the ring of the actuating structure; this deformation will increase the curvature of the semi-circle, so that the original electric field gradient will further increase under the condition of constant voltage, and the electric field gradient will cause The bending stress is also further increased, so that the actuating structure is further deformed until it balances with the force of the material against deformation or contacts the clamped object, and then maintains the shape and grip; As far as the manipulator is concerned, it has the advantages of potential damage and small damage to the structure to be acted on, and has a very wide range of application values.

Description

technical field [0001] The invention relates to a deformation manipulator, in particular to a flexible material reciprocating multilayer structure super large deformation actuator and method based on the principle of inverse flexoelectricity. Background technique [0002] The actuation technology of extremely small displacement has been widely used in the fields of material engineering, precise pointing of spacecraft, scientific instruments, and high-precision machining. Generally, piezoelectric materials with excellent micro-displacement output characteristics are used as the drive components for precision displacement output. The shortcomings of electrical materials, such as poor force-electric linearity, output accuracy limit at sub-nanometer level, polarization effect attenuation with time, and potential threats to the environment such as heavy metals, limit their further development. On the other hand, the rigid driving element may cause damage to the driven part itsel...

AI Technical Summary

Problems solved by technology

Generally, piezoelectric materials with excellent micro-displacement output characteristics are used as the drive components for precision displacement output. The shortcomings of electrical materials such as force-electric linearity difference, output accuracy limit at sub-nanometer level, polarization effect attenuation with time, and heavy metals have potential threats to the environment have limited their further development.

On the other hand, the rigid driving element may cause damage to the driven part itself, and it is difficult to adapt to curved surfaces or other more complex and variable working conditions

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