Controlled synchronization of a vibrating screen driven by two motors based on improved sliding mode controlling...

Area of Science:

• Mechanical Engineering
• Control Systems Engineering
• Vibration Analysis

Background:

• Modern vibrating screens require miniaturization, making traditional vibration synchronization methods insufficient.
• Existing methods cannot meet process demands for increased amplitude and precise phase control.
• Controlled synchronization offers a solution for achieving zero phase error and enhanced amplitude.

Purpose of the Study:

• To investigate the controlled synchronization of a dual-motor-driven vibrating screen.
• To implement an improved sliding mode control (SMC) method for enhanced performance.
• To achieve zero phase error and increase vibration amplitude in miniaturized screens.

Main Methods:

• Developed an electromechanical coupling dynamical model for the vibrating system.
• Designed controllers using Super-Twisting sliding mode control (ST-SMC) and backstepping second-order complementary sliding mode control (BSOCSMC) under a master-slave strategy.
• Employed an adaptive radial basis function neural network (ARBFNN) for uncertainty estimation and Lyapunov stability analysis for theoretical validation.

Main Results:

• Derived and numerically analyzed synchronization conditions and stability criteria for the vibrating system.
• Demonstrated the theoretical stability of the designed ST-SMC and BSOCSMC controllers using Lyapunov analysis.
• Simulation analysis confirmed the effectiveness of the proposed controlled synchronization method.

Conclusions:

• The improved sliding mode control strategy effectively achieves controlled synchronization in dual-motor vibrating screens.
• The proposed method successfully increases vibration amplitude and ensures zero phase error, meeting miniaturization requirements.
• This research provides a robust control solution for advanced vibrating screen applications.