scholarly journals Control of Hydraulic Pulse System Based on the PLC and State Machine Programming

Designs ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 48
Author(s):  
Juraj Pančík ◽  
Pavel Maxera
Keyword(s):  
Control System ◽  
Low Cost ◽  
Network Connectivity ◽  
Electronic System ◽  
Calibration Method ◽  
State Machine ◽  
Networked Control System ◽  
Industrial Safety ◽  
Pulse System ◽  
Hydraulic Pulse

In this paper, we deal with a simple embedded electronic system for an industrial pneumatic–hydraulic system, based on a low-cost programmable logic controller (PLC) and industrial electronic parts with 24 V logic. The developed system is a hydraulic pulse system and generates a series of high-pressure hydraulic pulses with up to a max. 200 bar output pressure level and with up to a max. 2 Hz output hydraulic pulses frequency. In this paper we are describing requirements, the concept of the embedded control system in a diagram, security features and its industrial network connectivity (CAN bus, MODBUS). In description of the software solution we describe the implementation of the program threads approach in this low-cost PLC. The PLC programming with threads generate two layers of services—physical and application layer, and as a result, the threads create the main control state machine. In conclusion, we describe the calibration method of the system and the calibration curves. For further study we offer readers the full programming code written in sequential function charts to be used as PLC language. The cost of the described industrial networked control system with industry standard optoelectronic insulated interfaces and certified industrial safety relay does not exceed €1000 Euros.

scholarly journals Control of Hydraulic Pulse System Based on the PLC and State Machine Programming

2018 ◽  
Author(s):  
Juraj PANCIK ◽  
Pavel MAXERA
Keyword(s):  
Low Cost ◽  
Network Connectivity ◽  
Calibration Method ◽  
State Machine ◽  
Pulse System ◽  
System User ◽  
Control Electronics ◽  
Multithreaded Program ◽  
Functional Prototype ◽  
Hydraulic Pulse

In the paper is described the control electronics for an industrial pneumatic – hydraulic system based on a low-cost PLC. The developed system is a hydraulic pulse system and it generates series of high pressure hydraulic pulses (max. 200 bar). We describe requirements, an overall concept of the embedded control system, user interface, security features and network connectivity. In the description of the software solution we describe implementation of hierarchical ordered program threads (multithreaded program) and main control state machine. At the conclusion, we describe the calibration method of the system and calibration curves and we present the schematic diagram and a photo of a functional prototype of the system.

Design and Development of a Real-time Characterization System for Energy Conversion Devices

2018 ◽  
Vol 21 (1) ◽  
pp. 007-013
Author(s):  
J. Riquelme A. ◽  
P. J. Sebastian ◽  
S. A. Gamboa ◽  
J. Campos
Keyword(s):  
Control System ◽  
Energy Conversion ◽  
Real Time ◽  
Electronic Circuit ◽  
Low Cost ◽  
Stable State ◽  
Electronic System ◽  
Feedback Control System ◽  
Electrical Load ◽  
Energy Conversion Devices

In this communication it is presented an electronic system for acquiring data from experimental energy conversion devices such as solar cells and fuel cells for micro-electronic applications. The electronic system consists of a software installed in a personal computer and an electronic circuit coupled to a four-wire terminal where the electrical variables like voltage and current can be measured from experimental cells. The software contains a feedback control system for allowing the maximum power transfer from the energy conversion device to the electrical load. It is possible to record and plot the obtained data in real time for a dynamic analysis of the experimental devices at transient or stable state conditions. It is a portable and low-cost device useful for educational and research purposes.

scholarly journals Fuzzy PID Gain Scheduling Controller for Networked Control System

2021 ◽  
pp. 210-216
Author(s):  
Osama Ali Awad ◽  
Isra'a Laith Salim
Keyword(s):  
Communication Network ◽  
Control System ◽  
Packet Loss ◽  
Low Cost ◽  
Gain Scheduling ◽  
Networked Control System ◽  
Networked Control ◽  
Control Technique ◽  
Fuzzy Pid ◽  
Loop Control

The use of a communication network in the closed loop control systems has many advantages such as remotely controlling equipment, low cost, easy to maintenance, efficient information transmission, etc. However, the Networked Control System (NCS) has many drawbacks, such as network-induce end-to-end time delay and packet loss, which lead to significant degradation in controller performance and may result in instability. Aiming at solving performance degradation in NCS, this paper propose to take the advantages and strength of the conventional Proportional-Integral-Derivative (PID), Fuzzy Logic (FL), and Gain Scheduling (GS) fundamentals to design a Fuzzy-PID like-Gain Scheduling (F-PID-GS) control technique, which has been proved to be effective in obtaining better performance. The True Time toolbox is used to establish the simulation model of the NCS. Ethernet as a communication network is simulated for different load conditions and random packet loss. The design approach is tested on a second order stepper motor. The results obtained show the effectiveness of the proposed approach in improving the overall system performance.

scholarly journals A real-time web-based networked control system education platform

2018 ◽  
Vol 55 (2) ◽  
pp. 130-141 ◽  
Author(s):  
João Cavalcanti ◽  
Luis FC Figueredo ◽  
João Y Ishihara ◽  
Mariana C Bernardes ◽  
Pedro HRQA Santana ◽  
...  
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Communication Networks ◽  
Networked Control Systems ◽  
Low Cost ◽  
Networked Control System ◽  
Networked Control ◽  
Multiple Controller ◽  
Education Platform

Networked control systems have recently experienced a surge in fundamental theoretical results ignited by numerous advantages of introducing shared multipurpose communication networks in control systems. Regarding developments on the practical side, however, a networked control system is still wanting when it comes to experimental platforms suitable for research and educational purposes, which contributes to most of networked control system theory being validated by means of numerical examples and simulations. This paper addresses this issue by presenting a low-cost real-time networked control system platform, based on custom hardware and software solutions that can be readily explored with the sole use of a web browser connected to the Internet. The technical decisions made during development represent a fundamentally novel take on networked control system experimental platforms that can potentially be reproduced by several universities. The platform provides the user with multiple controller and input reference options, network configurations, delay statistics, and even a downloadable file containing advanced experiment data. A survey conducted with students located over 1200 km away from the platform who used it during laboratory assignments highlight the system’s usability and interactivity, and supports the platform is suitable for educational purposes.

EXPERIMENTATION OF A LOW COST ELECTRONIC SYSTEM FOR MEASUREMENT OF THE ULTRAVIOLET RADIATION INDEX TO THE CITY OF CAMPINA GRANDE, BRAZIL

2019 ◽  
Author(s):  
Emerson da Trindade Marcelino ◽  
Júlio Mannuel Tavares Diniz ◽  
ALVARO ROCHA ◽  
Eisenhawer de Moura Fernandes ◽  
Raimundo Duarte ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Low Cost ◽  
Electronic System ◽  
The City

Design and implementation of C-MEX S-functions in an Android-based networked control system laboratory

2021 ◽  
pp. 014233122110268
Author(s):  
Lei Cao ◽  
Guo-Ping Liu ◽  
Wenshan Hu ◽  
Jahan Zaib Bhatti
Keyword(s):  
Control System ◽  
Networked Control System ◽  
Networked Control ◽  
Control Algorithms ◽  
Basic Block ◽  
Air Bearing ◽  
Experiment Validation ◽  
Functional Blocks ◽  
New Feature ◽  
Three Degree Of Freedom

The Android-based networked control system laboratory (NCSLab) is a remote control laboratory that adopts an extensible architecture, mainly including Android mobile devices, MATLAB servers, controllers and test rigs. In order to conduct various simulations and experiments more effectively in NCSLab, the first key issue that needs to be solved is to enable users to design their own control algorithms or functional blocks on the Android client, rather than just using the basic block libraries provided by the system. So, this paper proposes and implements a scheme for Android-based compilation of C-MEX S-functions. With this new feature, users can design personalized algorithm according to their requirements in the form of S-functions, which can be called and executed after being compiled by MATLAB server. Finally, through the experiment validation of the three-degree-of-freedom air bearing spacecraft platform, it is proved that the method of Android-based C-MEX S-functions is reliable and efficient, and this scheme well enhances the functionality and mobility of Android-based NCSLab.

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