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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2011, Vol. 32 ›› Issue (7): 1336-1344.doi: CNKI:11-1929/V.20110303.1352.001

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Parameter Optimization of Jet-pipe Servovalve Driven by Giant Magnetostrictive Actuator

LI Yuesong1, ZHU Yuchuan1, WU Hongtao1, TIAN Yisong2, NIU Shiyong2   

  1. 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Flight Automatic Control Research Institute, Xi’an 710065, China
  • Received:2010-11-08 Revised:2011-01-04 Online:2011-07-25 Published:2011-07-23

Abstract:

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.

Key words: jet-pipe servovalve, giant magnetostrictive actuator, parameter optimization, flow analysis, static characteristic, pressure gain

CLC Number: