An energy-saving nonlinear position control strategy for electro-hydraulic servo systems

2015 ◽  
Vol 59 ◽  
pp. 268-279 ◽  
Author(s):  
Keivan Baghestan ◽  
Seyed Mehdi Rezaei ◽  
Heidar Ali Talebi ◽  
Mohammad Zareinejad
Keyword(s):  
Energy Saving ◽  
Control Strategy ◽  
Position Control ◽  
Servo Systems ◽  
Hydraulic Servo

Electro-Hydraulic Servo System Controlled by Index Reaching Law Sliding Mode

2011 ◽  
Vol 317-319 ◽  
pp. 1490-1494 ◽  
Author(s):  
Bao Quan Jin ◽  
Yan Kun Wang ◽  
Ya Li Ma
Keyword(s):  
Sliding Mode Control ◽  
Control Strategy ◽  
Position Control ◽  
Sliding Mode ◽  
External Disturbance ◽  
Servo System ◽  
Response Speed ◽  
Reaching Law ◽  
Mode Control ◽  
Hydraulic Servo

The parameters uncertainty and external disturbance play a negative role to improve electro-hydraulic position servo system performance. The valve controlled cylinder system model is established, using the traditional PID control strategy and reaching law control strategy for simulating the system, respectively, the two methods have similar control effects in the ideal model, but considering the external disturbances, the index approaches sliding mode control law has better response speed and stability. Research shown that sliding mode control algorithm has an important role for improving the performance of hydraulic servo position control system.

Delay compensation position tracking control of electro-hydraulic servo systems based on a delay observer

2019 ◽  
Vol 234 (5) ◽  
pp. 622-633
Author(s):  
Xingya Ding ◽  
Gang Shen ◽  
Xiang Li ◽  
Yu Tang
Keyword(s):  
Position Control ◽  
Signal Transmission ◽  
Experimental Results ◽  
Shaking Table ◽  
Feedback Signal ◽  
Delay Compensation ◽  
Servo Systems ◽  
Hybrid Controller ◽  
Hydraulic Servo ◽  
Backstepping Controller

In this article, the position control problem of electro-hydraulic servo systems with feedback signal transmission delay is studied. In order to improve the control accuracy of the system, a hybrid controller which combines a delay observer, a nonlinear disturbance observer and a backstepping controller is proposed. The controller has the characteristics of compensating the delay of signal transmission, restraining the uncertain disturbance of control systems and high control precision. In order to verify the stability and validity of the proposed hybrid controller, a single-degree-of-freedom electro-hydraulic shaking table is used to verify the experimental results. The experimental results show that the proposed controller has better control effects than proportional integral derivative and backstepping controller.

A switched energy saving position controller for variable-pressure electro-hydraulic servo systems

2014 ◽  
Vol 53 (4) ◽  
pp. 1297-1306 ◽  
Author(s):  
Ali Tivay ◽  
Mohammad Zareinejad ◽  
S. Mehdi Rezaei ◽  
Keivan Baghestan
Keyword(s):  
Energy Saving ◽  
Variable Pressure ◽  
Servo Systems ◽  
Position Controller ◽  
Hydraulic Servo

scholarly journals Euler-Lagrange optimization of electric drives with DTM method

2018 ◽  
Vol 157 ◽  
pp. 08006
Author(s):  
Pavol Oršanský ◽  
Branislav Ftorek ◽  
Helena Šamajová ◽  
Ján Vittek
Keyword(s):  
Boundary Value Problem ◽  
Energy Saving ◽  
Control Strategy ◽  
Position Control ◽  
Optimization Method ◽  
Transformation Method ◽  
Lagrange Equations ◽  
Electric Drives ◽  
Optimization Principle ◽  
Copper Losses

Euler-Lagrange optimization method is exploited here to develop energy saving position control strategy valid for a.c. drives. The optimization principle respects copper losses minimization only. Boundary value problem for Euler-Lagrange equations is solved by Differential transformation method (DTM).

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