Study on nonlinear dynamics characteristics of electrohydraulic servo system

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• 作者：Yong Zhu (1) (2)
  Wan-Lu Jiang (1) (2)
  Xiang-Dong Kong (1) (2)
  Zhi Zheng (1) (2)
  
  1. Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control ; Yanshan University ; Qinhuangdao ; 066004 ; Hebei ; China
  2. Key Laboratory of Advanced Forging and Stamping Technology and Science (Yanshan University) ; Ministry of Education of China ; Qinhuangdao ; 066004 ; Hebei ; China
  
• 关键词：Electrohydraulic servo system ; Nonlinear dynamics model ; Bifurcation phenomenon ; Limit cycle oscillation ; Periodic motion ; Chaotic characteristic
• 刊名：Nonlinear Dynamics
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：80
• 期：1-2
• 页码：723-737
• 全文大小：3,885 KB
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• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Mechanics
  Mechanical Engineering
  Automotive and Aerospace Engineering and Traffic
  
• 出版者：Springer Netherlands
• ISSN：1573-269X

文摘

The electrohydraulic servo system (EHSS) has been widely utilized in industry and national defense. However, it is a complex dynamics system composed of many parts. The anomalies are easy to happen in operation, such as nonlinear vibration, noise, impact and so on. These anomalies significantly influence the stability of EHSS. Hence, in order to reveal the incentives, a nonlinear dynamic model was established. Then, the bifurcation characteristics and typical nonlinear dynamics behaviors implied within system were revealed. Moreover, the dynamic signals were measured from an experimental system and deeply analyzed by the effective methods of nonlinear dynamics. Results indicate that the variation of excitation force, spring force nonlinear term and damping can result in complicated nonlinear dynamic behaviors. The measured vibration signals of EHSS possess chaotic characteristic. Therefore, EHSS is a nonlinear dynamic system. This research provides a potent base for the study on nonlinear dynamics behavior of EHSS and makes the comprehensive analysis on nonlinear dynamics characteristics of EHSS become closer to reality.