Journal of Jilin University(Engineering and Technology Edition) ›› 2018, Vol. 48 ›› Issue (5): 1492-1499.doi: 10.13229/j.cnki.jdxbgxb20170584

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Differentiator-based discrete variable structure controller for direct drive electro-hydraulic servo system

JIANG Ji-hai1, GE Ze-hua1, YANG Chen2, LIANG Hai-jian1   

  1. 1.School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150080,China;
    2.AECC Aero Engine Control System Institute, Wuxi 214063, China
  • Received:2017-06-02 Online:2018-09-20 Published:2018-12-11

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Abstract: Direct Drive Volume Control (DDVC) servo system is a novel hydraulic servo system. With the continuous development of motor servo technology, it has been widely used in industrial and aerospace applications. The system has advantages of compact structure and high efficiency, but also has defects in dead zone and non-linear characteristics. In order to solve these problems, the state equation of the system was established and discretized. By using the third-order integral chain differentiator, the real-time values of the rod velocity and acceleration were obtained from the measurement signal of displacement, which constitute the full state feed-back control system. A nonlinear controller was designed with the Discrete Variable Structure Control (DVSC) algorithm based on the approach law. The simulation and experimental results show that the DVSC controller has better position tracing characteristics than traditional PID controller, which improves the controlling performance of DDVC servo system.

Key words: hydraulic transmission and control, direct drive volume control, discrete variable structure control, differentiator

CLC Number: 

  • TP273.4
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