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A Gain-Adaptive Intelligent Nonlinear Control for an Electrohydraulic Rotary Actuator

  • Nguyen Minh Tri
  • Dang Xuan Ba
  • Kyoung Kwan Ahn
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Abstract

This paper introduces an effective approach for trajectory-tracking control of an electrohydraulic rotary actuator (EHRA). The key feature of this control approach is to utilize a gain-adaptive fuzzy sliding mode control technique to realize the control objective wherein the mathematical model of the system dynamics does not need to be known exactly. Firstly, a state space form of the system model is reviewed. Secondly, an adaptive sliding mode modifier is constructed to derive an equivalent control signal while an additional fuzzy tuning scheme is employed to maintain the system robustness. Convergence of the closed loop system is then ensured by using Lyapunov analyses. Finally, effectiveness and feasibility of the proposed control method are confirmed through three experimental cases in different working conditions.

Keywords

Pump–controlled hydraulic system Electro hydraulic actuator Sliding mode control Fuzzy turning Adaptive control 

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Copyright information

© Korean Society for Precision Engineering and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical Engineering, Graduate SchoolUniversity of UlsanUlsanRepublic of Korea
  2. 2.School of Mechanical EngineeringUniversity of UlsanUlsanRepublic of Korea

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