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Parameter Optimization of Jet-pipe Servovalve Driven by Giant Magnetostrictive Actuator
Received date: 2010-11-08
Revised date: 2011-01-04
Online published: 2011-07-23
In order to improve the performance of a jet-pipe servovalve, a novel direct drive jet-pipe servovalve driven by a giant magnetostrictive actuator is proposed in this paper. By means of magnetic field finite element analysis, a model of the giant magnetostrictive actuator is established. The influence of coil structure on actuator displacement is analyzed and the experimental curves of the designed actuator are given. On the basis of the designed jet-pipe servovalve and taking the maximum energy transfer efficiency as the optimization objective, an equation is built between the jet parameters and jet efficiency. The best jet structure parameters of the designed servovalve are worked out, and its static characteristics are analyzed with the help of a flow field analysis software. The results show that its null dimensionless pressure gain is 1.7 mm-1, and the null dimensionless flow gain is 1.9 mm-1.
LI Yuesong , ZHU Yuchuan , WU Hongtao , TIAN Yisong , NIU Shiyong . Parameter Optimization of Jet-pipe Servovalve Driven by Giant Magnetostrictive Actuator[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011 , 32(7) : 1336 -1344 . DOI: CNKI:11-1929/V.20110303.1352.001
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