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State-of-the-art mechatronic systems for mining developed in Poland
Published in Christoph Mueller, Winfred Assibey-Bonsu, Ernest Baafi, Christoph Dauber, Chris Doran, Marek Jerzy Jaszczuk, Oleg Nagovitsyn, Mining Goes Digital, 2019
Dariusz Jasiulek, Małgorzata Malec, Bartosz Polnik, Krzysztof Stankiewicz, Stanisław Trenczek
A distributed control system (DCS) is a specially designed automated control system that consists of geographically distributed control elements over the plant or control area. It differs from the centralized control system wherein a single controller at a central location handles the control function, but in DCS each process element or machine or group of machines is controlled by a dedicated controller. DCS consists of a large number of local controllers in various sections of plant control area which are connected via a high speed communication network. R&D projects, realized at KOMAG, enabled a development of distributed control system modules under the trade name KOGASTER. KOGASTER is a good example of a system which is able to include and unite, mentioned above, self-powered sensors and wired/wireless computer communication networks, and is implemented in a harsh mining environment.
A systematic classification scheme for cyber-attack taxonomy
Published in Stein Haugen, Anne Barros, Coen van Gulijk, Trond Kongsvik, Jan Erik Vinnem, Safety and Reliability – Safe Societies in a Changing World, 2018
S. Kim, J. Shin, G. Heo, J.G. Song
The DCS divides one central processing unit to distribute various functions. The overall system configuration is connected to each computer with a small number of central processing units via a communication network. DCS is developed to replace the PID (Proportional Integral Derivative) controller and generally controlled the complex process. The basic feature of DCS is to distribute the process control functions to several computers to improve the reliability and minimize the ripple effect in the event of an error. In addition, it facilitates data processing and operation management by concentrating information, driving operation, and management functions of distributed computers on the Distributed Operate Console. The basic components of the DCS are a CPU (Central Processing Unit) that performs data in real time, a data highway, LAN (Local Area Network) connecting a communication line, a signal input/output unit, an interface for power supply, and a power supply for supplying power [2]. The comparison between PLC and DCS is shown in the following Table 2.
Distributed Control System (DCS)
Published in Chanchal Dey, Sunit Kumar Sen, Industrial Automation Technologies, 2020
With the advent of IBM desktop PC in 1981, and almost at the same time, to fulfill the requirement of automation for process plant, DCS stood out with the adequate support of high-quality hardware modules and inexpensive software packages. DCS is a computerized control system for a process or plant usually with a large number of I/O devices present in control loops, in which autonomous controllers are geographically and functionally distributed throughout the system, but there is a central operator supervisory station for continuous monitoring and control. With time DCS has become more powerful with a lot of additional features related to the entire plant automation network, i.e., from field instruments to the managerial decision-making process.
Application of machine learning at wastewater treatment facilities: a review of the science, challenges and barriers by level of implementation
Published in Environmental Technology Reviews, 2023
Sanaz Imen, Henry C. Croll, Nicole L. McLellan, Mark Bartlett, Geno Lehman, Joseph G. Jacangelo
As control applications require real-time data transfer, unless all the data streams and trained ML agents are hosted on a local server, internet connectivity will be required. While internet connectivity provides many useful services, such as remote connection, it also makes the industrial control systems (ICS) vulnerable to cyber-attacks. The ICS consists of supervisory control and data acquisition (SCADA) systems, distributed control system (DCS), safety instrumented systems (SIS), and other control system configurations such as programmable logic controllers (PLCs). Recent studies showed the advantages of applying ML algorithms for intrusion and anomaly detection in ICS [109]. Alhaidari and Al-Dahasi [110] showed ability of ML algorithms for determining the attack patterns and improving the framework of SCADA system against Distributed Denial of Service (DDoS) attack.
Structure of distributed control system in Seimei telescope
Published in SICE Journal of Control, Measurement, and System Integration, 2021
Ichiro Jikuya, Daichi Uchida, Masaru Kino, Mikio Kurita, Katsuhiko Yamada
The other is called the distributed control system (DCS). The idea of DCS is to estimate the state x from local sensor information. For example, the DCS to the 1-st segmented mirror is given by where , , and in the left hand sides are the 1-st to 3-rd elements of the input u; see Equation (10) in [5]. The terms , , and in the right hand sides are estimates of , , and from local sensor information , , , and . The coefficients , , in the right hand sides are the gains of the DCS for the 1-st segmented mirror.
One approach to temperature distribution control in thermal power plant boilers
Published in Automatika, 2020
Aleksandra Marjanović, Sanja Vujnović, Željko Ðurović
Nikola Tesla B TPP (TENT B) is located on the right bank of the Sava River, 50 km upstream from Belgrade. It comprises two of the largest power supply facilities in Serbia, whose nominal power is 650 MW. During reconstruction of TENT B1, a Distributed Control System (DCS) was installed. This enabled upgrading of control structures. The steam boiler at TENT B1 was designed by the Polish company Rafako under license from Sulzer [35]. The cross section of the boiler is 20 m×20 m. The primary fuel is lignite coal with highly varying calorific value, and the secondary fuel, used for startup and fire stabilization, is fuel oil. Unit B1 has eight mills of equal capacity, located at the ground level of the boiler room, and there are three levels of burners. Combustion uniformity at the different levels of the furnace is achieved by controlling each of the three burner apertures. In unit B1, the configuration of the burners is tangential (Figure 2), to induce whirling of combustion products and thus improve combustion and heat exchange. This configuration additionally results in combustion stability and lower maximum flame temperatures.