The refuge chamber provides a safe space where people can stay when they are trapped by an accident in coal mine. includes several systems such as oxygen supply, air purification, cooling, and dehumidifying. supply system is the core of because it closed environment. time 96 h according to relevant standards America China. If for more than h, may not be enough, danger. It necessary efficiently ...

A novel design for flow and level control in a hydroelectric power plant using Programmable Logic Controller (PLC)-Human Machine Interface (HMI) and neural cascaded with fuzzy scheme is proposed. This project will focus on design and development of flow and level controller for small scale hydro generating units by implementing gate control based on PLC-HMI with the proposed scheme. The existin...

Due to the fast material reaction in zinc hydrometallurgy, traditional national standard photometric method cannot capture characteristic information of target substances real time. Herein, a nitrogen protection device is built based on ultraviolet spectrophotometry, supplemented by programmable logic controller (PLC), form an automatic control system for direct detection (SO42−, Pb2+ and S2−) ...

The Programmable Logic Controller (PLC) is located at the junction of virtual network and physical reality in Industrial Control System (ICS), which vulnerable to attacks due its weak security. Specifically, firmware tampering take under PLC operating system as primary attack target. provides bridge between PLC’s hardware software, means against can be more destructive harmful than other attack...

he anticipated extensive use of flexible-manufacturing workT cells in the future has encouraged recent research efforts on the development of automatic supervisory-control methodologies. However, despite intensive research on the theoretical aspects of the control of manufacturing workcells, modeled as discrete-event systems (DES), a limited amount of research has been reported on the implement...

thefollowing contents represent the systematic approach of setting up and running the hardware-in-the-loop (HIL) simulationfor an active heave compensated (AHC) draw-works as a conceptual horizon of implementing HIL for any plant whereby the model is determined. A Simulation model of the draw-works is executed on a PC to simulate the AHC draw-workswith a physical PLC. The PLC (ET200S) is config...

Industrial discrete event dynamic systems (DEDSs) are commonly modeled by means of Petri nets (PNs). PNs have the capability to model behaviors such as concurrency, synchronization, and resource sharing, compared a step transition function chart or GRAphe Fonctionnel de Commande Etape Transition (GRAFCET) which is particular case PN. However, there not an effective systematic way implement PN i...

Abstract Designing, building, commissioning, operating and maintaining multiple complex cryogenics process control systems involves many challenges. For several years, CERN has developed various solutions to help with the whole lifecycle of a cryogenic system. This allowed production quality highly reliable electrical systems. paper will present use these innovative automated tools their evolut...

A common practice is to design a controller by plant observations (i.e. experiments) and to optimize some of its parameters by trial-and-error. This paper proposes a genetic algorithm for the automation of the search procedure and its implementation on a programmable logic controller. The details of this implementation will be discussed along with an example one carried out for the control of a...

The paper presents the identification issues of the self-tuning nonlinear controller ASPECT (Advanced control algorithmS for ProgrammablE logiC conTrollers). The controller is implemented on a simple PLC platform with an extra mathematical coprocessor, but is intended for the advanced control of complex processes. The model of the controlled plant is obtained by means of experimental modelling....