Internet-based Control System Research Articles

Fuzzy control of an industrial process system using internet and web services

This paper illustrates an internet-based fuzzy control system of complex industrial manufacturing, which is cement production. It ensures remote and fuzzy control of the process in real time in cement factories in Algeria. The remote control system contains several tasks, such as alarms diagnostic, e-maintenance and synchronising regulation loops, to guarantee the automated performance. To evolve the system, we propose firstly, fuzzy logic to control the cement mill workshop and ensure that the system is operational with minimal downtime. Secondly, we integrate internet technology to remote control via internet to secure human life and render it unnecessary for operators to be at site. When there is a breakdown, it is not necessary to send an expert to diagnose and solve problems. Therefore, the system reduces travel costs by sending reports and transmitting process data. Operators can execute and monitor the system according to authentication access in main control room or via internet.

Industrial Internet of Things: Design and Stabilization of Nonlinear Automation Systems

A fuzzy model-based method for Internet-based control of nonlinear automation systems is presented, here. In this way, the nonlinear system is decomposed to a set of fuzzy-blended locally linearized subsystems, and further the previously proposed variable selective control methodology is applied to each subsystem. In order to deal with Internet effects, real-time control signals are constructed for every entry of pre-specified vector of time delays, which is chosen based on the presumed upper-bound of the network time delay. Using the idea of parallel distributed compensation strategy and by solving linear matrix inequalities, the closed-loop stability of the overall Internet-based control system is guaranteed. Simulation studies on two well-known benchmark problems demonstrate the effectiveness of the proposed method.

Investigation into Remote Monitoring of Power Transformers using SCADA

This paper investigates the use of internet-based Supervisory Control and Data Acquisition (SCADA) system to monitor power transformer parameters remotely and to investigate into how personnel can have access to their system regardless of their location. There are several parameters that can be monitored for efficient operation of a power transformer, although temperature, voltage, load and bushing condition are considered in this work because they are the major cause of transformer failure. In carrying out this work, the software and hardware components required to carry out the remote monitoring function was considered. Means of preventing hackers from getting access to the network have been considered. The implementation of the monitoring system will help to save running cost by optimising maintenance schedule and reduce risk of failure to the power transformer.

Design and implementation of an Internet based effective controlling and monitoring system with wireless fieldbus communications technologies for process automation—An experimental study

The network requirements of control systems in industrial applications increase day by day. The Internet based control system and various fieldbus systems have been designed in order to meet these requirements. This paper describes an Internet based control system with wireless fieldbus communication designed for distributed processes. The system was implemented as an experimental setup in a laboratory. In industrial facilities, the process control layer and the distance connection of the distributed control devices in the lowest levels of the industrial production environment are provided with fieldbus networks. In this paper, the Internet based control system that will be able to meet the system requirements with a new-generation communication structure, which is called wired/wireless hybrid system, has been designed on field level and carried out to cover all sectors of distributed automation, from process control, to distributed input/output (I/O). The system has been accomplished by hardware structure with a programmable logic controller (PLC), a communication processor (CP) module, two industrial wireless modules and a distributed I/O module, Motor Protection Package (MPP) and software structure with WinCC flexible program used for the screen of Scada (Supervisory Control And Data Acquisition), SIMATIC MANAGER package program (“STEP7”) used for the hardware and network configuration and also for downloading control program to PLC.

Analysis of GA in overlay-based NCS

Because of random and uncertain delay, Internet can not guarantee QoS requirements of Internet-based remote Networked Control System (NCS), such as real-time performance, thus affecting the stability of NCS. This paper combined the data transmission characteristics of remote NCS, using Overlay Network to improve the basic network QoS services and genetic algorithm and simulated annealing to optimize Overlay Network costs. These strategies can guarantee the reliability of remote NCS. It was illustrated through the simulation experiments that the strategies in the paper can minimize Overlay Network total costs on the basis of meeting the delay requirements of the remote NCS. It was helpful to the deployment of the control system in the Internet.

A framework of security and safety checking for internet-based control systems

Internet-based control is a way of using the internet as a platform for remote monitoring and control operation. The obvious benefit is to enable remote monitoring and maintenance of process plants and to initiate global collaboration and data sharing between operators from geographically dispersed locations. However, connection to an open network and the use of universal technology present high safety and security risks to the new generations of control systems. Are we opening up our internet-enabled control systems for trouble since a number of malicious hackers continually attack web servers on the internet? The new type of control systems will never be accepted by industries if people do not have enough confidence in their safety and do not feel secure by using the system. This paper presents a framework of security and safety checking, used in the design of internet-based control systems. Based on the existing measures of physical and network securities, such as firewall and comprehensive user-authorised access control, the framework proposed in this paper focuses on the security of control commands transferred over the internet, responding actions to malicious attacks and system safety. An internet-based control system for a process rig is used as a case study to illustrate the implementation of the framework.

Design issues and implementation of internet-based process control systems

The Internet provides great potential for the high-level control of process plants. Internet-based process control is a new concept which has been received much attention in previous years. However, little work has so far been done aimed at developing systematic design methods for the design of such Internet-based process control systems. In this paper, five essential design issues that arise from web-related features of Internet-based process control have been investigated: requirement specification, architecture selection, web-based interface design, supervision control, and system safety checking. A water tank control system is used to demonstrate our design methodology. Uniquely, video feedback, text-based chatting, and a whiteboard are embedded in the system and shared by multiple communicating users. Virtual supervision parameter control is implemented to overcome the dynamic time delays caused by the Internet traffic. The experimental results show that the Internet-based control system for the water tank can have a similar behaviour to the local control system if properly designed.

Internet-based monitoring and controls for HVAC applications

Significant advances in Internet and computer technology have made it possible to develop an Internet-based control, monitoring, and operation scheduling system for heating, ventilation, and air-conditioning (HVAC) systems. The proposed system architecture includes such features as control, measurement, networking, and reporting. This article addresses issues in architecture selection, electronics, embedded processors and software, and Internet technologies. This article also proposes an Internet-based HVAC system architecture that combines Web technology, networking, and functions of direct digital control. The proposed system also includes technologies needed for supporting real-time digital thermostat control, data gathering, remote access and occupancy control, light sensing control, and views of the history of HVAC utilization. This system enables users to make cost-effective energy decisions and quickly identify trouble spots of HVAC systems to minimize system down time.