An integral terminal sliding mode control scheme for speed control system using a double-variable hydraulic...

Area of Science:

• Hydraulic engineering
• Energy systems
• Control theory

Background:

• The Common Pressure Rail (CPR) system is a research hotspot due to its energy-saving potential, crucial for addressing energy crises and environmental pollution.
• Hydraulic transformers, key components in CPR systems, suffer from low efficiency and poor control, hindering their practical application.
• Existing hydraulic systems require optimization for better performance and wider adoption.

Purpose of the Study:

• To propose a novel double-variable hydraulic transformer (DVHT) to overcome the limitations of traditional hydraulic transformers.
• To develop an advanced control strategy for the DVHT to enhance system efficiency and control accuracy.
• To demonstrate the feasibility and effectiveness of the proposed DVHT and its control method in improving CPR system performance.

Main Methods:

• Design and introduce a new double-variable hydraulic transformer (DVHT) with adjustable displacement.
• Develop a new control strategy tailored to the unique characteristics of the DVHT's two control variables.
• Propose an adaptive integral terminal sliding mode controller to ensure system robustness and stability.

Main Results:

• The proposed DVHT allows for pressure regulation while maintaining optimal cylinder speed, enhancing operational efficiency.
• Simulation results validate the feasibility of the DVHT concept.
• The adaptive control method successfully achieves multitasking control and significantly improves the overall control effect.

Conclusions:

• The novel DVHT presents a viable solution for improving efficiency and control in hydraulic systems.
• The developed adaptive control strategy effectively enhances the performance and robustness of the DVHT.
• This research contributes to the advancement of energy-saving hydraulic technologies for CPR systems.