Volume 50 Issue 7
Jul.  2024
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Article Navigation >  Journal of Mine Automation  > 2024  >  50(7): 21-31
MA Hongwei, LI Lang, XUE Xusheng, et al. Research on hydraulic control system for shield type temporary support robot driving under pressure[J]. Journal of Mine Automation，2024，50（7）：21-31.  doi: 10.13272/j.issn.1671-251x.2024030001
Citation: MA Hongwei, LI Lang, XUE Xusheng, et al. Research on hydraulic control system for shield type temporary support robot driving under pressure[J]. Journal of Mine Automation，2024，50（7）：21-31.  doi: 10.13272/j.issn.1671-251x.2024030001
shu

Research on hydraulic control system for shield type temporary support robot driving under pressure

doi: 10.13272/j.issn.1671-251x.2024030001
  • 1.

    College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China

  • 2.

    Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Detection and Control, Xi'an 710054, China

  • Received Date: 2024-03-01
  • Rev Recd Date: 2024-07-22
    • Available Online: 2024-08-02
    Abstract
  • The shield type temporary support robot is an important component of the intelligent excavation robot system for large section roadways that adapts to the coexistence of dirt and debris. Its main function is to provide a safe and reliable workspace for achieving "parallel excavation and support" operations. In order to enhance the safe and stable support of the shield type temporary support robot for surrounding rock during its pushing and driving process, based on the structure, working environment, and operational requirements of the shield type temporary support robot, a mathematical model of its pushing amount and support force during pressurized driving, as well as a dynamic model of pressurized driving, are established. A hydraulic control system for the shield type temporary support robot driving under pressure is designed. The system mainly consists of a support hydraulic system and a driving hydraulic system. During static support, the support hydraulic system needs to constantly output a support force greater than the weight of the upper shield body itself, and the driving hydraulic system is in standby mode. When driving under pressure, the support hydraulic system and the driving hydraulic system work simultaneously, ensuring that the temporary support robot "reducing stress without leaving the roof" while steadily moving forward with the roof under pressure at all times. A precise control method for shield type temporary support robot driving under pressure based on fuzzy PID is proposed. The pressure and displacement signals of the temporary support robot are collected in real time by displacement sensors integrated on the displacement cylinder and pressure sensors in the hydraulic circuit. The signals are used to reflect the changes in support force and driving displacement during the temporary support robot's driving under pressure. Based on the error and error rate of the support force and displacement, the fuzzy PID algorithm is used to modify the control parameters of the support force and displacement, achieving reliable control of driving under pressure based on the fuzzy PID algorithm. Both simulation and experimental results show that the effect of fuzzy PID control is superior to traditional PID control. Under fuzzy PID control, the relative error of support force during the pushing and driving process of the shield type temporary support robot is less than 1%, and the driving displacement error is less than 2 mm. Moreover, the response speed of support force and pushing amount control is fast, ensuring the safe and stable support of the surrounding rock during the pushing and driving process.

     

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