Design and analysis of a nested structure micro-displacement amplification mechanism for a galfenol-based actuator
| Autor: | Rui Wang, Yuchuan Zhu, Bruno Niyomwungeri, Renqiang Li, Yuyang Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology 01 natural sciences Rod Displacement (vector) Computer Science::Robotics 0103 physical sciences General Materials Science Electrical and Electronic Engineering Civil and Structural Engineering Galfenol 010302 applied physics business.industry Magnetostriction Structural engineering 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics Finite element method Mechanism (engineering) Hysteresis Mechanics of Materials Signal Processing 0210 nano-technology Actuator business |
| Zdroj: | Smart Materials and Structures. 28:095026 |
| ISSN: | 1361-665X 0964-1726 |
| DOI: | 10.1088/1361-665x/ab35c5 |
| Popis: | In this paper, two Galfenol rods are arranged in a nested structure to amplify the micro-displacement of an actuator. First, a finite element model of the actuator is developed to analyze the magnetization process of the actuator for different material of the sleeves. Secondly, the mathematical model of the actuator is established using the theory of magnetization, magnetostriction, and structural dynamics to describe the output displacement characteristics of the actuator at different frequencies; the hysteretic behavior of the actuator is taken into consideration and is modeled according to Jiles-Atherton hysteresis model. The experiments and results show that the output displacement of the dual Galfenol rods-based actuator (DGA) is significantly larger than that of a single Galfenol rod-based actuator (SGA) under the same experimental conditions, in addition to that, the proposed nested structure exhibits the advantages of occupying small volume and maintaining response dynamics even at high frequencies. Finally, using the established mathematical model, studies are carried out to analyze the feasibility of further amplification of the output displacement using more than two Galfenol rods in a nested structure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|