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Acta Armamentarii ›› 2024, Vol. 45 ›› Issue (5): 1514-1522.doi: 10.12382/bgxb.2022.0922

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Fractional Order Linear Active Disturbance Rejection Control for Electro-hydrostatic Actuator of Ship Rudder

LÜ Mingming1,2, XIE Huawei3, ZHONG Wei1,*(), WAN Guolong3, TU Chaofan3   

  1. 1 School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, Jiangsu, China
    2 Laboratory of Science and Technology on Marine Navigation and Control, China State Shipbuilding Corporation, Tianjin 300131, China
    3 The Jiujiang Branch of 707 Research Institution, China State Shipbuilding Corporation, Jiujiang 332007, Jiangxi, China
  • Received:2022-10-11 Online:2023-04-09
  • Contact: ZHONG Wei

Abstract:

In order to improve the disturbance rejection performance of electro-hydrostatic actuator (EHA) of ship rudder, a fusion control method based on linear active disturbance rejection control (LADRC) and fractional order proportional derivative (FOPD) control is proposed. The mathematical models of the drive motor and hydraulic system are established, respectively. On this basis, a linear extended state observer (LESO) is employed to estimate the total disturbances of EHA, including internal and external disturbances, under different operating conditions. The bounded stability of LESO is also proved. Furthermore, the FOPD control is used as the control law to actively suppress the estimated total disturbance, and the control parameters are determined by frequency response indicators such as shear frequency and phase margin. The joint simulation analysis of EHA model based on AMESim and Simulink shows that the displacement control accuracy of the proposed control method based on LADRC and FOPD is about 1mm when the ship speed is 6kn or 8kn. The self-developed EHA is used to build a semi-physical testing device, on which the reverse rudder and sudden reversal tests are carried out. The results show that the proposed control method has high speed and stability in tracking steering commands under load disturbances and sudden reversal situations.

Key words: ship rudder, electro-hydrostatic actuator, linear active disturbance rejection, fractional order proportional derivative

CLC Number: