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Volume 34 Issue 7
Jul.  2008
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Journal of Beijing University of Aeronautics and Astronautics  > 2008  >  34(7): 786-789.
Ji Youzhe, Qi Xiaoye, Qiu Lihua, et al. Simulation analysis of pump and valve combined EHA efficiency design[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 786-789. (in Chinese)
Citation: Ji Youzhe, Qi Xiaoye, Qiu Lihua, et al. Simulation analysis of pump and valve combined EHA efficiency design[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 786-789. (in Chinese)
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Simulation analysis of pump and valve combined EHA efficiency design

  • School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 15 Jun 2007
  • Publish Date: 31 Jul 2008
    Abstract
  • The efficiency influencing factors of the valve control section of valve and pump combined electrical hydraulic actuator (EHA) were analyzed. The method to improve the system efficiency by decreasing the design value of source pressure was proposed. According to the working characteristics of the pump and valve combined EHA, the change of output flow, losing flow of servo valve and pump, total efficiency of actuation system and other main performance parameters caused by source pressure change were analyzed at the same working condition. The result indicates that the system efficiency is improved and the power loss caused by losing flow is reduced in some range. The rapidity and stability become better, the disturbance rejection becomes worse, so that the efficiency and performance should be considered integrated. The simulation testing of actuation system based on spring load proves the feasibility of new method.

     

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  • [1] Wang Zhanlin, Qiu Lihua,Yü Liming. Major development trends of aircraft hydraulic system Proceedings of the International Conference on Recent Advances in Aerospace Actuation Systems and Components. Toulouse:National Institute for Sciences of Toulouse,2001:147-154 [2] Stephen C J.Flight test experience with an electro-mechanical actuator on the F-18 systems research aircraft The 19th Digital Avionics Systems Conferences.Arlington:IEEE,2000 [3] Botten S L, Whitley C R, King A D. Flight control actuation technology for next generation all-electric aircraft[J]. Technology Review Journal Millennium Issue,2000:55-68 [4] Ji Youzhe, Qi Xiaoye, Pei Zhongcai.Pump and valve combined scheme of EHA based on variable pressure The Fifth International Symposium on Fluid Power Transmission and Control. Beijing:Chinese Mechanical Engineering Society,2007:855-858 [5] 王占林.液压伺服控制[M].北京:北京航空学院出版社,1987:113-118 Wang Zhanlin. Hydraulic servo control[M]. Beijing:Press of Beijing Aeronautic College,1987:113-118(in Chinese) [6] Kazmeier B, Feldmann D G. A quantitative comparison of three concepts of an electro-hydraulic actuator of small power focused on dynamic behaviour and energy lossed The 5thScandinavian International Conference on Fluid Power.Sweden:Link ping University,1997:215-230
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