An energy-saving nonlinear position control strategy for electro-hydraulic servo systems.
Keivan Baghestan1, Seyed Mehdi Rezaei1, Heidar Ali Talebi2
1Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran.
ISA Transactions
|November 2, 2015
Summary
This study introduces an energy-saving nonlinear backstepping control for electro-hydraulic servo systems (EHSS). The novel approach enhances position control efficiency in industrial machinery.
Area of Science:
- Control Engineering
- Hydraulic Systems
- Robotics
Background:
- Electro-hydraulic servo systems (EHSS) offer advantages in size and performance.
- However, their widespread industrial use is hindered by lower energy efficiency.
Purpose of the Study:
- To propose a nonlinear backstepping control algorithm with an energy-saving strategy for EHSS position control.
- To improve the overall efficiency of EHSS in industrial and machinery applications.
Main Methods:
- A nonlinear backstepping control algorithm was designed for position tracking via a proportional directional valve (PDV).
- An energy-saving control law was developed for a proportional relief valve (PRV) input.
- The control design utilized a normal form transformation of the system's state space equations.
- Internal dynamics stability was analyzed for specific operational cases.
Main Results:
- Experimental results confirmed the successful achievement of position tracking objectives.
- The proposed method effectively met the energy-saving goals for the EHSS.
- The closed-loop system demonstrated satisfactory performance in both tracking and efficiency.
Conclusions:
- The developed nonlinear backstepping control with an energy-saving approach is effective for EHSS position control.
- This method addresses the efficiency limitations of EHSS in industrial settings.
- The approach ensures stability of internal dynamics, validating its practical applicability.
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