A double closed loop digital hydraulic cylinder position system based on switching active disturbance rejection
Shouling Jiang1,2, Guochao Zhao3, Fuxian Huang1
1School of Computer, Heze University, No.2269, Daxue Road, Heze, 274015, Shandong, China.
Scientific Reports
|January 9, 2025
Summary
A novel switching active disturbance rejection control (SADRC) strategy enhances digital hydraulic cylinder control by overcoming composite disturbances. This advanced method improves response speed by 32.56% compared to PID control.
Area of Science:
- Control Systems Engineering
- Hydraulic Systems
- Robotics
Background:
- Digital hydraulic cylinders face complex disturbances like friction and external loads.
- Existing control methods struggle with the nonlinear dynamics of these systems.
Purpose of the Study:
- To develop a robust control strategy for digital hydraulic cylinder position control.
- To address composite disturbances in double closed-loop systems.
Main Methods:
- Derivation of high-order state equations from the system's mathematical model.
- Transformation of the system into a second-order integral series control system using Active Disturbance Rejection Control (ADRC).
- Proposal and stability analysis (Lyapunov theory) of a Switching Active Disturbance Rejection Control (SADRC) strategy.
Main Results:
- SADRC strategy demonstrated superior performance over PID control.
- Achieved a 32.56% improvement in response speed and a 2.0% reduction in error.
- Simulation and experimental results showed consistent trends, validating the control strategy's feasibility.
Conclusions:
- The proposed SADRC strategy effectively manages composite disturbances in digital hydraulic cylinders.
- The method offers significant improvements in control accuracy and speed.
- Validated feasibility and effectiveness through simulations and experiments.
Keywords:
ADRC strategyComposite disturbanceDouble closed-loop digital hydraulic cylinderSwitch controlMore Related Videos
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