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.

Simulations and Experiments on the Force Control of Hydraulic Servo System for Hydraulic Robots

2016 ◽  
Vol 826 ◽  
pp. 128-133 ◽  
Author(s):  
Hyo Gon Kim ◽  
Jong Won Lee ◽  
Yong Ho Choi ◽  
Jeong Woo Park ◽  
Jin Ho Suh
Keyword(s):  
Force Control ◽  
High Performance ◽  
Control Method ◽  
Servo System ◽  
Force Density ◽  
Hydraulic Actuator ◽  
Underwater Robots ◽  
Heavy Load ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

Because hydraulic actuator has higher power and force density, it is normally used in heavy load manipulator robots and industrial equipment which require high torque. Also, the hydraulic actuator is applied to underwater robots that need high performance maneuver in underwater operations. The force control has benefits to those kind of robots to ensure compliance with user or environment. However, the hydraulic actuator is difficult to control forces due to the non-linearity characteristic of the hydraulic servo system. In this paper, we propose a force control method with compensation of force derivative and natural velocity feedback. We also describe a method of applying it to the real system. In order to evaluate the effect of the proposed control method, the simulations and experiments were performed.

scholarly journals The Influence of Servo Drive Control on the NC Vertical Milling Machine Dynamic Compliance

2020 ◽  
Vol 4 (4) ◽  
pp. 111
Author(s):  
Jan Grau ◽  
Pavel Souček ◽  
Matěj Sulitka
Keyword(s):  
Machine Tool ◽  
Position Control ◽  
Dynamic Compliance ◽  
Numerical Control ◽  
Machining Process ◽  
Servo Drive ◽  
Compliance Matrix ◽  
Mechanical Structure ◽  
Feed Drive ◽  
Drive Control

A model Numerical Control (NC) machine tool dynamic compliance is analyzed, including the influence of its mechanical structure and position control feed drive algorithms. The dynamic model of the machine tool is divided into two main parts, which are closest to the machining process. First, the milling head assembly group is presented as a system of one mass oscillating in a 2D plane and 3D space. Second, the motion axes assembly group, XY cross table with linear feed drive, is presented. A square 2×2 dimension matrix of the total dynamic compliance is evaluated within the feed drive control system included. Partial elements of the mechanical structure dynamic compliance matrix of the general N×N dimension are contained in the total dynamic compliance matrix.

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.

Research on Servo System for CNC Machine Tool Driven by Permanent Magnet Synchronous Torque Motor

2012 ◽  
Vol 562-564 ◽  
pp. 1505-1508
Author(s):  
Mu Lan Wang ◽  
Kai Yun Xu ◽  
Chuan He ◽  
Lei Zhou
Keyword(s):  
Machine Tool ◽  
Permanent Magnet ◽  
High Performance ◽  
Control Method ◽  
Control Strategies ◽  
Servo System ◽  
Numerical Control ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Control Machine Tool

Permanent Magnet Synchronous Torque Motor (PMSTM) has the main characteristics of low speed, high torque, high precision and excellent stability, which can be applied to implement the direct driving technology for CNC (Computer Numerical Control) machine tool. In this paper, the mathematical model of PMSTM is simply introduced, and the various control strategies are discussed in detail. According to the requirement of high performance for PMSTM driving servo system in CNC machine tool, the corresponding suitable control method is employed in the feed servo system. The proposed scheme is also promoted to apply in the spindle system, the tool holder and the turntable of machine tool.

A Fuzzy PID Controller Design and Application

2014 ◽  
Vol 952 ◽  
pp. 279-282
Author(s):  
Hong Hua Xu ◽  
Li Li ◽  
Hong Yu Zhai
Keyword(s):  
Pid Control ◽  
Fuzzy Controller ◽  
Controller Design ◽  
Control Process ◽  
Design Procedure ◽  
Reference Method ◽  
Fuzzy Pid ◽  
Loop Control ◽  
Pid Controller Design ◽  
Hydraulic Servo

Control system of microcomputer controlled electro-hydraulic servo rock three triaxial test instrument adopts closed loop control and the control strategy is based on PID control. Because the conventional PID control cannot meet the control accuracy and stability of system, the intelligent fuzzy controller is introduced to realize the automatic processing in control process. The fuzzy PID controller's design procedure is given to determine the fuzzy domain, fuzzy rules, calculating the reference method and defuzzification process of membership function.

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.

Design of the Vehicular Eletro-Optical Tracking Turntable Servo System and the Research on its Tracking Control Scheme

2013 ◽  
Vol 712-715 ◽  
pp. 2119-2123
Author(s):  
Dong Ji ◽  
Hua Pei Wang ◽  
Qing Guo ◽  
Qing Lu
Keyword(s):  
High Precision ◽  
Tracking Control ◽  
High Performance ◽  
Servo System ◽  
Optical Tracking ◽  
Quality Data ◽  
Measurement Tool ◽  
Position Measurement ◽  
Loop Control ◽  
Control Scheme

In order to realize the high precision tracking control of the vehicular eletro-optical tracking turntable with the car bodys vibration, it is necessary to design a high performance turntable servo system and a set of high precision eletro-optical tracking control scheme. In this paper, a digital servo system is designed, which has the control platform based on PC104 processor, has the torque motor as the actuator, has the gyro as the inertial velocity measurement tool and has the high precision encoder as the position measurement tool. Then, the gyrostabilized double speed loop control algorithm with disturbance observer compensating is designed to realize a good inertial velocity stability performace; and, a set of eletro-optical tracking compound position loop control scheme based on the target-missing quality data processing, the segmented PID control and the acceleration lag compensating control is proposed to enhance the eletro-optical tracking precision. The result shows that the tracking turntable based on the control technology designed in this paper is reliable, responses quickly, has a good speed stability performance and a high eletro-optical tracking precision performance.

scholarly journals Synchronization of Electrical Drives via EtherCAT Fieldbus Communication Modules

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 604
Author(s):  
Marcin Paprocki ◽  
Krystian Erwiński
Keyword(s):  
Control Systems ◽  
Motion Control ◽  
High Performance ◽  
Manufacturing Industry ◽  
Numerical Control ◽  
Servo Drive ◽  
Electrical Drives ◽  
Time Dependencies ◽  
Drive Systems ◽  
Synchronization Mechanisms

Synchronization between devices (in particular drive systems) is paramount for multi-axis motion control systems used in Computerized Numerical Control (CNC) machines, robots, and specialized technology machines used in many areas of the manufacturing industry. EtherCAT is an Ethernet-based network that is one of the most popular industrial networks for multi-axis motion control systems. EtherCAT is standardized in the IEC 61158 and IEC 61784 standards. In the article, an EtherCAT communication network for electrical drives is presented. The article focuses on the synchronization in the EtherCAT network consisting of one master device and slave servo drive devices. Special attention is given to synchronization mechanisms in EtherCAT, such as distributed clocks in slave servo drives devices. For this purpose, a laboratory stand was built consisting of two prototype servo drive devices with BLDC motors equipped with EtherCAT communication modules. A description of the working developed EtherCAT communication modules is given. Authors in communication modules ware used an EtherCAT Slave Controller (ESC) chip (AX58100) to implement lower EtherCAT layers. EtherCAT application layer was implemented in software form on a 32-bit microcontroller, based on CANopen over EtherCAT (CoE) CAN in Automation 402 (CiA402) profile. This research’s main contribution was to show the time dependencies regarding synchronization in terms of data flow in the EtherCAT communication stack in slave servo drive devices. The research results showed that the synchronous operation of drives is mainly influenced not by the mechanism of distributed clocks that ensures synchronization in the EtherCAT network but the implementation of the highest layer of the communication stack in slave servo drive devices. Experimental results are presented that prove the modules’ adequacy for use in high-performance motion control systems.

scholarly journals Observer Based Robust Position Control of a Hydraulic Servo System Using Variable Structure Control

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
E. Kolsi-Gdoura ◽  
M. Feki ◽  
N. Derbel
Keyword(s):  
Position Control ◽  
Sliding Mode ◽  
Servo System ◽  
Variable Structure ◽  
Structure Design ◽  
Stability And Convergence ◽  
Loop Control ◽  
Unmatched Uncertainty ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

This paper deals with the position control of a hydraulic servo system rod. Our approach considers the surface design as a case of virtual controller design using the backstepping method. We first prove that a linear surface does not yield to a robust controller with respect to the unmatched uncertainty and perturbation. Next, to remedy this deficiency, a sliding controller based on the second-order sliding mode is proposed which outperforms the first controller in terms of chattering attenuation and robustness with respect to parameter uncertainty only. Next, based on backstepping a nested variable structure design method is proposed which ensures the robustness with respect to both unmatched uncertainty and perturbation. Finally, a robust sliding mode observer is appended to the closed loop control system to achieve output feedback control. The stability and convergence to reference position with zero steady state error are proven when the controller is constructed using the estimated states. To illustrate the efficiency of the proposed methods, numerical simulation results are shown.

Study of Pneumatic Force Servo System for Resistance Spot Welding

2014 ◽  
Author(s):  
Bo Wang ◽  
Tao Wang ◽  
Wei Fan ◽  
Yu Wang
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
High Speed ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Servo System ◽  
Servo Drive ◽  
Force System ◽  
Resistance Spot ◽  
Modulation Control

The purpose of this paper is to develop a pneumatic servo drive mechanism, which is the basis of high performance pneumatic servo gun for resistance spot welding. In order to increase the output force and reduce costs, booster cylinder and high speed solenoid valve are included in the system. In this paper, a mathematical model of the pneumatic force servo system is derived. Pulse-Width-Modulation control scheme is given to control the solenoid valves. Computer simulation results and experimental results show that the designed pneumatic servo force system has a good performance, which verifies the feasibility of the designed scheme.

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