Robust H-Infinity Tracking Control for a Valve-Controlled Hydraulic Motor System with Uncertain Parameters in the...

Area of Science:

• Engineering
• Control Systems
• Fluid Power Systems

Background:

• Valve-controlled hydraulic motor systems operate under complex, fluctuating load conditions.
• Load variations significantly impact motor speed stability and overall system efficiency.
• Existing control methods often treat load disturbances as external, neglecting internal system uncertainties.

Purpose of the Study:

• To develop a robust control strategy for valve-controlled hydraulic motor systems.
• To address challenges posed by complex load changes and system parameter uncertainties.
• To enhance speed stability and operating efficiency in dynamic environments.

Main Methods:

• Analysis of valve-controlled hydraulic motor system structure.
• Development of a system model incorporating uncertain parameters and linearization errors.
• Design of a robust H-infinity tracking control strategy treating uncertainties as internal disturbances.

Main Results:

• The proposed robust H-infinity control strategy effectively manages internal disturbances, including uncertain parameters and load torque.
• Simulation results demonstrate superior control characteristics compared to traditional PID control.
• The enhanced control scheme exhibits improved robustness in complex operating environments.

Conclusions:

• The robust H-infinity tracking control offers a significant improvement for valve-controlled hydraulic motor systems.
• This approach enhances system performance by effectively handling internal uncertainties and load fluctuations.
• The proposed method provides a more reliable and efficient solution for demanding applications.