Effect of Correcting the Electro-Hydraulic Servo Drive on the Stability and Controllability of an Airplane

2015 ◽  
Vol 775 ◽  
pp. 314-318
Author(s):  
Leonid A. Igumnov ◽  
Vladimir S. Metrikin
Keyword(s):  
Dynamic Characteristics ◽  
Servo System ◽  
Servo Drive ◽  
Numerical Computations ◽  
Controlling System ◽  
Hydraulic Servo ◽  
The Stability ◽  
Input Perturbation

Response of a simplest servo system to an input perturbation is considered for two variants of correction of a servo drive to provide its stability and controllability. Numerical computations made it possible to find out the effect of the main parameters of the system on the dynamic characteristics of the controlling system.

Application of High Performance Electro-Hydraulic Synchronous Servo System on NC Broaching Machine

2013 ◽  
Vol 721 ◽  
pp. 497-500
Author(s):  
Guo Jin Chen ◽  
Jing Ni ◽  
Ting Ting Liu ◽  
Ming Xu
Keyword(s):  
High Performance ◽  
Control Process ◽  
Servo System ◽  
Numerical Control ◽  
Servo Drive ◽  
Loop Control ◽  
Performance Accuracy ◽  
Drive Control ◽  
Hydraulic Servo ◽  
Output Quantity

Aiming at the lower performance, accuracy and efficiency of the existing motion control process for the traditional broaching machine, the paper studies the high-performance dual-hydraulic synchronous servo drive control technology. The synchronous electro-hydraulic servo system forms the closed loop control by the detection and feedback of the output quantity. It eliminates and restrains largely the influence of the adverse factors to obtain the high-precision synchronous driving performance. The numerical control system based on the real-time error compensation and the intelligent control to the auxiliary machinery is developed. It is used for the CNC broaching machine to make the steady-state synchronous displacement error of the double cylinders be ≤ 0.5mm.

Dynamic Characteristic Analysis of Hydraulic Servo System in a Mold Oscillating Mechanism

2014 ◽  
Vol 1025-1026 ◽  
pp. 183-191 ◽  
Author(s):  
Yong Hui Park ◽  
Hyun Chul Park
Keyword(s):  
Servo System ◽  
Characteristic Analysis ◽  
Operation Conditions ◽  
Design Variables ◽  
Hydraulic Servo ◽  
Natural Characteristic ◽  
Hydraulic Servo System ◽  
The Stability ◽  
Oil Gas ◽  
Force Equilibrium

In this study, a hydraulic servo system for mold oscillating mechanism was investigated. In order to check the efficiency and the stability of system, its geometrical designs, which change the natural characteristic of system, including a spool volume, area of piston, and so on were analyzed by a non-linear model. The model was composed of the equation of orifice, the continuity equation, and the force equilibrium including a variable effective bulk modulus belonging to operating oil, gas, and cylinder. All simulations were conducted by the MATLAB SIMULINK, and simulated as specific conditions corresponding real operation conditions in the steel industry. According to the analysis, the relation between a controller, servo design, and system performance was investigated with physical means. And, the fact that not compared to other design variables, the entrance shape on spool was dominant to determine the stability and the performance of system, was found. Furthermore, a fault detection method, and optimization problem including this work were discussed.

Lyapunov Based Adaptive Control Method for Hydraulic Servo Drive

2016 ◽  
Author(s):  
Hamid Roozbahani ◽  
Konstantin Frumkin ◽  
Heikki Handroos
Keyword(s):  
Adaptive Control ◽  
Control Algorithm ◽  
Environmental Changes ◽  
Control Method ◽  
Servo System ◽  
Adaptive Controller ◽  
Servo Drive ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
Adaptive Control Algorithm

Adaptive control systems are one of the most significant research directions of modern control theory. It is well known that every mechanical appliance’s behavior noticeably depends on environmental changes, functioning-mode parameter changes and changes in technical characteristics of internal functional devices. An adaptive controller involved in control process allows reducing an influence of such changes. In spite of this such type of control methods is applied seldom due to specifics of a controller designing. The work presented in this paper shows the design process of the adaptive controller built by Lyapunov’s function method for a hydraulic servo system. The modeling of the hydraulic servo system were conducting with MATLAB® software including Simulink® and Symbolic Math Toolbox™. In this study, the Jacobi matrix linearization of the object’s mathematical model and derivation of the suitable reference models based on Newton’s characteristic polynomial were applied. In addition, an intelligent adaptive control algorithm and system model including its nonlinearities was developed to solve Lyapunov’s equation. Developed algorithm works properly and considered plant is met requirement of functioning with. The results shows that the developed adaptive control algorithm increases system performance in use devices significantly and might be used for correction of system’s behavior and dynamics.

Design and Stimulation of Hydraulic Servo System for Vehicle Test Equipment for Rubber Shock Absorber

2010 ◽  
Vol 142 ◽  
pp. 243-247
Author(s):  
Cong Ling Zhu ◽  
Wei Zhu Jin ◽  
Wen Seng Gui
Keyword(s):  
Dynamic Characteristics ◽  
Shock Absorber ◽  
Servo System ◽  
Simulation Software ◽  
Test Equipment ◽  
Design Parameters ◽  
Core Element ◽  
Computer Emulation ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

Development of special rubber shock absorber test equipment for vehicle will become very important, this equipment can test and analysis of dynamic characteristics for rubber shock absorber.The paper discusses the problem on optimum design of electro-hydraulic servo system which drives the vibration set. A closed system for controlling mechanical position or motion using feedback from the electro-hydraulic servo valve of the device as an input has been used in hydraulic servo system. The maximum region of design parameters has been defined for hydraulic servo cylinder as a core element of the electro-hydraulic exciting system. Established the mathematical model of the system, and the dynamic characteristics of the hydraulic servo cylinder are investigated by utilizing the simulation software MATLAB. The results of computer emulation show that this method is practical.

Simulation and Optimization Research of Multi-Stud Tensioning Machine Controlled by Servo Valve

2013 ◽  
Vol 664 ◽  
pp. 871-877
Author(s):  
Xiao Dong Tan ◽  
Wei Ji ◽  
Zhi Bo Luan
Keyword(s):  
Dynamic Characteristics ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Mathematic Model ◽  
Hydraulic Cylinder ◽  
Simulation And Optimization ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
The Stability

In this paper, we base on the simulation analysis of the electro-hydraulic servo system about dual hydraulic cylinders parallel driving Multi-Stud Tensioning Machine, focus on the dynamic characteristics of a single hydraulic cylinder (asymmetric hydraulic cylinder), make use of Matlab Simulink module to carry on to imitate, and design a PID controller to correct the system. The results of simulation prove correctness of the system mathematic model, and the stability of the system is obviously improved.

Simulation of Hydraulic Servo System Based on Dynamic Monitoring in Mechanical Engineering

2013 ◽  
Vol 644 ◽  
pp. 85-88
Author(s):  
Jia Dong Dong ◽  
Li Chen Gu
Keyword(s):  
Real Time ◽  
Mechanical Engineering ◽  
Servo System ◽  
System Model ◽  
Dynamic Monitoring ◽  
Belt Conveyor ◽  
Hydraulic Servo ◽  
Axis Position ◽  
Hydraulic Servo System ◽  
The Stability

Sensor system of the belt conveyor is designed, then corrective and alarm command is given. According to the signal of real-time monitoring, belt deviation state is determined, and roller axis position is adjusted in order to achieve the purpose of deviation – adjusting. Based on dynamic monitoring of the belt conveyor, corrective devices are constructed, and hydraulic servo system model is designed by Matlab software in this paper, then the stability of the system is analyzed.

Model Reference Adaptive Control on a Hydraulic Servo System

2011 ◽  
Vol 268-270 ◽  
pp. 505-508
Author(s):  
Zhi Yong Qu ◽  
Zheng Mao Ye
Keyword(s):  
Servo System ◽  
Adaptive Controller ◽  
Fast Response ◽  
System Stability ◽  
Servo Systems ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
Simulation Results ◽  
The Stability ◽  
Model Reference Adaptive

Hydraulic servo systems are usually used in industry. This kind of system is nonlinear in nature and generally difficult to control. The ordinary linear constant gain controller can cause overshoot or even loss of system stability. Application of adaptive controller to a nonlinear hydraulic servo system is investigated in this paper. The dynamic model of the system is given and the stability is also analyzed using Popov's criterion. The steady state error can be eliminated using adaptive controller combined with an integration term. Simulation results show the performance of adaptive controller with fast response and less overshoot

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