超磁致伸缩电静液作动器的试验研究与特性分析

doi:10.7527/S1000-6893.2015.0295

Abstract

Abstract:

Electro-hydrostatic actuators (EHAs) driven by giant magnetostrictive materials (GMM) have some features including highly integrated structure,lots of factors affecting the performance and complex theoretical analysis. In order to search a reliable theoretical analysis method of giant magnetostrictive materials-based electro-hydrostatic actuator (GMEHA) and improving the output performance, the experiment platform of GMA is built in this paper and contrast experiment of actuator dynamic characteristics is completed. On the basis of accurate test and observation of experimental phenomena,structure decomposition of GMEHA is done. Natural frequency of each part is set as breakthrough point of theoretical analysis. A method of combining experiments,theory and finite element analysis (FEA) is taken to analyze the effect on the output performance of actuator caused by dynamic characteristics of cantilever valve,pipeline,hydraulic cylinder and accumulator. The theory analysis method in accordance with experiment is concluded and the key part which affected and restricted the output performance of actuator is determined. Finally, the optimization scheme of GMEHA is put forward on the basis of the above theoretical and experimental researches. Experimental results of actuator after optimization show that the best output performance has been received at the frequency of about 200 Hz and the bias of 0.6 MPa with the valve of 0.15 mm thickness,and the maximum output flow can reach 1.2 L/min.

Key words: giant magnetostrictive materials, electro-hydrostatic actuator, dynamic characteristics, experimental investigation, output performance, optimization

CLC Number:

YANG Xulei, ZHU Yuchuan, JI Liang, FEI Shangshu, GUO Yazi. Experimental investigation and characteristic analysis of a giant magnetostrictive materials-based electro-hydrostatic actuator[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(9): 2839-2850.

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Experimental investigation and characteristic analysis of a giant magnetostrictive materials-based electro-hydrostatic actuator

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