Modeling and Control of Proportional Valve with Synchronous Motor

2015 ◽  
Vol 220-221 ◽  
pp. 457-462 ◽  
Author(s):  
Andrzej Milecki ◽  
Dominik Rybarczyk
Keyword(s):  
Permanent Magnets ◽  
Dead Zone ◽  
Flow Characteristics ◽  
Synchronous Motor ◽  
Hydraulic Actuator ◽  
Servo Drive ◽  
Proportional Valve ◽  
Modeling And Control ◽  
Basic Characteristics ◽  
And Control

The paper describes the research results of modeling and control of proportional valve with synchronous motor type PMSM (Permanent Magnets Synchronous Motor). In the paper, a simulation model of the proposed valve was developed and described. The model included the square root flow characteristics, nonlinearity of the hydraulic actuator, valve dead zone and saturation of the flow. The study included the investigations of the basic characteristics, such as valve flow characteristic and step responses. In order to determine the basic parameters of the valve, the test stand was built, on which the new valve and the servo drive with this valve were tested. A servo drive control system was based on PLC with touch panel and inverter module. In the paper, the chosen investigations results of the valve and the servo drive system are presented and shortly discussed.

Modeling and Control of an Electro-hydraulic Injection Molding Machine With Smoothed Fill-to-Pack Transition*

2003 ◽  
Vol 125 (1) ◽  
pp. 154-163 ◽  
Author(s):  
Danian Zheng ◽  
Andrew Alleyne
Keyword(s):  
Injection Molding ◽  
Process Model ◽  
Flow Characteristics ◽  
Hydraulic Actuator ◽  
Molding Machine ◽  
Transfer Scheme ◽  
Injection Molding Machine ◽  
Modeling And Control ◽  
And Control ◽  
Injection Cycle

In this paper the modeling of a typical injection cycle for an injection-molding machine (IMM) is examined. Both the mold filling and mold packing phases of the cycle are examined along with a critical fill-to-pack transition. The novelty in this modeling work is that the nonlinear model considers both the machine hydraulic actuator and polymer flow characteristics in extensive detail. The simulation model is validated against experimental data and demonstrates the availability of a relatively accurate system model for full cycle control design of this electro-hydraulic system. The accurate process model is used in the design of a controller for the injection cycle including the fill-to-pack transition. The overall algorithm includes two Iterative Learning Controllers connected by a bumpless transfer scheme between them. The algorithm is successfully tested through model simulations and machine experiments. The simulation and experimental results presented demonstrate a significantly smoother control signal and pressure transient between the two learning controlled phases as well as overall tracking convergence for each phase.

Detailed Dynamic Modelling of an Integrated Hydraulic Actuator

2020 ◽  
Author(s):  
Dom Wilson ◽  
Ioannis Georgilas ◽  
Andrew Plummer ◽  
Pejman Iravani ◽  
Dhinesh Sangiah
Keyword(s):  
High Performance ◽  
Dynamic Modelling ◽  
Flow Characteristics ◽  
Hydraulic Cylinder ◽  
Theoretical Development ◽  
Hydraulic Actuator ◽  
Pressure Losses ◽  
Low Leakage ◽  
Smart Actuator ◽  
And Control

Abstract Hydraulic servos are characterised by their high-performance nature but due to their size and weight are not suitable for robotics where new legged applications require high power density and excellent dynamic behaviour in a small size. As an answer to this need a new class of integrated smart actuators is being developed. These systems consist of a servo valve, hydraulic cylinder, sensors and a controller all in a single device. This paper outlines the detailed modelling of the smart actuator for use in simulation and control design. The result is a model consisting of the dynamics of the novel ultra-low leakage servovalve, the valve flow characteristics considering the properties of each spool land, the single-ended cylinder with friction and the pressure losses in the supply and return lines to the actuator. The models are a combination of empirical and theoretical development, validated with experimental data. The smart actuator’s unique properties; compactness, weight and efficiency, combined with high-performance hydraulics make it well suited to mobile robot applications.

scholarly journals Human Simulated Intelligent Control with Double-Direction Dead-Zone Compensation for Joint Motion Control of a Large-Sized Boom System

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Rongsheng Liu ◽  
Yingjie Gao ◽  
Yulin Yang ◽  
Yanlong Liu
Keyword(s):  
Motion Control ◽  
Intelligent Control ◽  
Dead Zone ◽  
Control Mode ◽  
Joint Motion ◽  
Compensation Scheme ◽  
Negative Effects ◽  
Proportional Valve ◽  
Control Scheme ◽  
And Control

Joint motion control of a 52-meter-long five-boom system driven by proportional hydraulic system is developed. It has been considered difficult due to strong nonlinearities and parametric uncertainties, the effect of which increases with the size of booms. A human simulated intelligent control scheme is developed to improve control performance by modifying control mode and control parameters. In addition, considering the negative effects caused by frequent and redundant reverse actions of the proportional valve, a double-direction compensation scheme is proposed to deal with the dead-zone nonlinearity of proportional valve. Sinusoidal motions are implemented on a real boom system. The results indicate that HSIC controller can improve control accuracy, and dead-zone nonlinearity is effectively compensated by proposed compensation scheme without introducing frequent reverse actions of proportional valve.

Modeling and control of a bearingless permanent magnet synchronous motor

2017 ◽  
Vol 53 (1) ◽  
pp. 151-165 ◽  
Author(s):  
Xiaodong Sun ◽  
Yichen Shen ◽  
Zhi Zhou ◽  
Zebin Yang ◽  
Long Chen
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Modeling And Control ◽  
And Control

scholarly journals Modeling and Control of a Modular Iron Bird

Aerospace ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 39
Author(s):  
Luciano Blasi ◽  
Mauro Borrelli ◽  
Egidio D’Amato ◽  
Luigi Emanuel di Grazia ◽  
Massimiliano Mattei ◽  
...  
Keyword(s):  
Angular Position ◽  
Flight Simulation ◽  
Control Surface ◽  
Medium Size ◽  
Hydraulic Actuator ◽  
Control Laws ◽  
Modeling And Control ◽  
Loop Dynamics ◽  
Proportional Integral Derivative Control ◽  
And Control

This paper describes the control architecture and the control laws of a new concept of Modular Iron Bird aimed at reproducing flight loads to test mobile aerodynamic control surface actuators for small and medium size aircraft and Unmanned Aerial Vehicles. The iron bird control system must guarantee the actuation of counteracting forces. On one side, a hydraulic actuator simulates the hinge moments acting on the mobile surface due to aerodynamic and inertial effects during flight; on the other side, the actuator to be tested applies an active hinge moment to control the angular position of the same surface. Reference aerodynamic and inertial loads are generated by a flight simulation module to reproduce more realistic conditions arising during operations. The design of the control action is based on a dynamic model of the hydraulic plant used to generate loads. This system is controlled using a Proportional Integral Derivative control algorithm tuned with an optimization algorithm taking into account the closed loop dynamics of the actuator under testing, uncertainties and disturbances in the controlled plant. Numerical simulations are presented to show the effectiveness of the proposed architecture and control laws.

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