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Dual-valve parallel prediction control for an electro-hydraulic servo system.
Shi-Jie Su1, Yuan-Yuan Zhu1, Cun-Jun Li2
1School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
Science Progress
|December 13, 2019
Summary
This study introduces a dual-valve system and a novel control algorithm to enhance electro-hydraulic servo systems. The combined approach significantly improves dynamic response and control accuracy for high-flow applications.
Area of Science:
- Control Systems Engineering
- Fluid Power Systems
- Robotics and Automation
Background:
- Improving dynamic response in high-flow electro-hydraulic servo systems is crucial.
- Existing offline optimization methods limit real-time performance adjustments.
- Synchronous and time-sharing controls for multiple valves have been explored but lack dynamic optimization.
Purpose of the Study:
- To propose an online optimization method for multiple valve control in electro-hydraulic servo systems.
- To enhance the dynamic response and control accuracy of high-flow electro-hydraulic systems.
- To introduce a novel dual-valve parallel control strategy.
Main Methods:
- Connecting a high-flow proportional valve in parallel with a low-flow servo valve.
- Implementing a proportional-integral-derivative (PID) system as an inner loop controller.
- Utilizing a multivariable predictive control (MPC) system as an outer loop controller for online optimization.
Main Results:
- Dual-valve parallel control effectively improved control accuracy and dynamic response.
- The proposed PID-MPC controller further enhanced dynamic control accuracy.
- Simulation and experimental results validated the effectiveness of the proposed method.
Conclusions:
- The dual-valve parallel configuration is a viable strategy for improving electro-hydraulic servo system performance.
- Online optimization using a PID-MPC controller offers dynamic performance improvements.
- This approach addresses the limitations of offline optimization in control systems.
Keywords:
Dual-valve controlelectro-hydraulic servo systempredictive controlproportional-integral-derivative–multivariable predictive controlMore Related Videos
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