Research of a Robust Control for Electro Hydraulic Servo System

2014 ◽  
Vol 986-987 ◽  
pp. 1103-1107
Author(s):  
Xiao Gang Tang ◽  
Chao Zhang
Keyword(s):  
Robust Control ◽  
Pid Control ◽  
Pid Controller ◽  
Manufacturing Industry ◽  
The Novel ◽  
Servo Systems ◽  
Novel Approach ◽  
Aerospace Manufacturing ◽  
Control Scheme ◽  
Hydraulic Servo

In recent years, electro hydraulic servo systems are more and more widely used in the aerospace, manufacturing industry and the agricultural machinery. As a result, higher requirements are put forward for the performance and application environment, including better tracking precision and respond speed. Aiming at the shortcomings of conventional PID controller, such as the large overshoot, long transfer time and poor robustness performance, a robust control scheme with dual-loop structure is proposed in this paper. Simulation results show that better performances are acquired in the novel approach in contrast with the PID control scheme and the structure of the proposed scheme is simple and easy to implement.

Research on the Double-Loop Robust Control Technology for the Electric-Hydraulic Servo System

2013 ◽  
Vol 423-426 ◽  
pp. 2792-2798
Author(s):  
Tian Peng He ◽  
Shu Li ◽  
Xiao Long Li
Keyword(s):  
Robust Control ◽  
Manufacturing Industry ◽  
Servo System ◽  
Response Speed ◽  
Double Loop ◽  
Tracking Accuracy ◽  
Aerospace Manufacturing ◽  
Control Scheme ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

With the electro-hydraulic servo mechanism is more and more widely used in aerospace, manufacturing industry and agricultural machinery, its control performances are required by process environment with more and more expectations, which include increasing response speed and improving tracking accuracy. Because the traditional PID controller possesses large overshoot, long conversion time, bad robustness and other shortcomings, the double-loop robust control algorithm is proposed. Simulation results show that, compared with traditional PID control scheme, the proposed control scheme can achieve accurate tracking of electro-hydraulic servo system quickly. Therefore, it enhances product performance, optimizes the design process, and also possesses a high application value.

Practical profile tracking for a hydraulic press using sliding mode controller

2021 ◽  
pp. 095440622199839
Author(s):  
A Tony Thomas ◽  
R Parameshwaran ◽  
S Sathiyavathi ◽  
A Vimala Starbino
Keyword(s):  
Pid Controller ◽  
Sliding Mode ◽  
Fast Response ◽  
Hydraulic Press ◽  
Sliding Mode Controller ◽  
Proportional Integral Derivative ◽  
Servo Systems ◽  
Control Scheme ◽  
Pressure Dynamics ◽  
Hydraulic Servo

Electro Hydraulic Servo Systems (EHSS) offer fast response in different industrial aspects such as heavy machines, cranes and robots. To obtain a precise piston profile and to achieve the designed speed, a Sliding Mode Controller (SMC) for the duration of piston extension and retraction is presented in this paper. The novelty lies in the development of a practical profile connecting the system supply pressure dynamics to the duration of piston extension and retraction. Based on the curve fitting technique, a quadratic profile is designed for a practical hydraulic press. The Sliding Mode Controller is employed to achieve repeatable tracking of the profile generated with guaranteed soft seating velocity, thereby increasing the lifetime of the hydraulic press. The performance of the proposed controller is compared with the baseline Proportional Integral Derivative (PID) controller with square wave as well as exponential wave tracking tests in simulation and experimentation which confirm the effectiveness of the proposed control scheme.

scholarly journals A Novel Method for Tuning PID Controller

2013 ◽  
Vol 6 (1) ◽  
pp. 62-74
Author(s):  
Abidaoun H. shallal ◽  
Rawaa A. Karim ◽  
Osama Y. Al-Rawi
Keyword(s):  
Computer Technology ◽  
Pid Control ◽  
Pid Controller ◽  
Control Algorithm ◽  
The Novel ◽  
Operation Conditions ◽  
Wide Range ◽  
Novel Method ◽  
Mechanical Performances ◽  
Dc Servomotor

Proportional integral derivative (PID) control is the most commonly used  control algorithm in the industry today. PID controller popularity can be attributed to the  controller’s effectiveness in a wide range of operation conditions, its functional simplicity, and the ease with which engineers can implement it using current computer technology . In this paper,the Dc servomotor model is chosen according to his good electrical and mechanical performances more than other Dc motor models , discuss the novel method for  tuning PID controller and comparison with Ziegler - Nichols method from through parameters of transient response of any system which uses PID compensator

Application of Electro-Hydraulic Servo Systems to Hot Strip Down Coilers

2012 ◽  
Vol 6 (4) ◽  
pp. 445-449 ◽  
Author(s):  
Hiroaki Kuwano ◽  
◽  
Shinichi Yokota ◽  
Keyword(s):  
Control Method ◽  
The Novel ◽  
Servo Systems ◽  
Rolling Mills ◽  
Servo Valve ◽  
Control Effectiveness ◽  
Hot Strip ◽  
Hydraulic Servo ◽  
Hot Strip Mills ◽  
Controlled Object

Many kinds of electro-hydraulic servo systems have been applied to rolling mills, such as hot strip mills, cold strip mills, and seamless tube mills, for their quick response, high power, and high positioning accuracy. However, when an electro-hydraulic servo system is applied to a hot strip down coiler, it is found that the controlled object has low natural frequency and is lightly damped, so stable control is very difficult to achieve. In order to overcome these issues, first, the optimal control theory is applied to eliminate these deficiencies [1, 2]. However, the derived control system is found to lack robustness. Control effectiveness is highly influenced by the response of servo valve and the length of the piping between the servo valve and the cylinder in particular. Finally, a novel, practical controlmethod is found and proposed in the process of adjusting the production machine. The novel control method proposed here, based on the “posicast” control proposed by O. J. M. Smith in 1957 [3], has realized a kind of dead-beat control and has been found to be robust because it uses the internal information of the controlled object.

scholarly journals Novel Approach of PID Control Scheme With UPFC’S for Damping of Oscillations

2012 ◽  
pp. 104-109 ◽  
Author(s):  
Sobuj Kumar Ray ◽  
Pejush Chandra Sarker ◽  
Munshi Sabbir Ahsan ◽  
M. M. Israfil Shahin Seddiqe
Keyword(s):  
Pid Control ◽  
Novel Approach ◽  
Control Scheme

A Nonlinear PID Controller for Electro-Hydraulic Servo System Based on PSO Algorithm

2011 ◽  
Vol 141 ◽  
pp. 157-161 ◽  
Author(s):  
Ji Peng Chen ◽  
Bao Chun Lu ◽  
Fan Fan ◽  
Shi Chun Zhu ◽  
Jian Xin Wu
Keyword(s):  
Pid Control ◽  
Pid Controller ◽  
Servo System ◽  
Pso Algorithm ◽  
Nonlinear Functions ◽  
Proportional Integral ◽  
Nonlinear Pid Controller ◽  
Hydraulic Servo ◽  
Nonlinear Pid Control ◽  
Hydraulic Servo System

Linear PID controller is adopted by electro-hydraulic servo system widely. The proportional, integral and derivative coefficients of a linear controller are fixed which brings the contradiction in speediness and overshoot. This paper designs a series of nonlinear functions which are used for nonlinear PID control for electro-hydraulic servo system. The proportional, integral and derivative parts of this nonlinear PID controller adjust themselves according to the error. In order to determine parameters of the nonlinear functions, PSO Algorithm and ITAE guideline are applied in the paper. Results of simulation indicate that the nonlinear PSO-PID controller using the functions proposed in this paper presents a better dynamic response than the linear PID controller.

Fuzzy Self-Tuning PID Controller in SEHS

2012 ◽  
Vol 214 ◽  
pp. 765-770
Author(s):  
Lan Sun
Keyword(s):  
Pid Controller ◽  
Fuzzy Controller ◽  
Fuzzy Pid ◽  
Motor Speed ◽  
Fuzzy Pid Controller ◽  
Control Scheme ◽  
Hydraulic Servo ◽  
Self Tuning ◽  
Hybrid Fuzzy Pid ◽  
Better Than

Because of the existing hybrid fuzzy PID controller does not perform, using electric hydraulic servo system application (SEHS). Therefore, when the system parameters change will require a new adjustment of PID controller variable. Therefore, a hybrid fuzzy and fuzzy self-tuning PID control was put forward. With this control scheme was divided into two parts, and the fuzzy controller and fuzzy self-tuning PID controller. Fuzzy controller is used to control the output of the system of the values of the system away from target value. We proved that the performance of the control scheme through the experiment of the motor speed control SEHS. The experimental results show that the proposed a hybrid fuzzy PID controller and fuzzy self-tuning effect is better than that of a hybrid fuzzy and PID controller.

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