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Real Time Automation and Ratio control Using PLC&SCADA in Industry 4.0

Computer Systems Science & Engineering 2023年第5期45卷 1495-1516页

作者： Basant Tomar Narendra Kumar Mini Sreejeth Dept of Electrical Engineering Delhi Technological UniversityDelhi 110042India

Industrial control Systems(ICS)and SCADA(Supervisory control and Data Acquisition)systems play a critical role in the management and regulation of critical *** systems brings us closer to the real-time application *** process and equipment control capability is typically provided by a Distributed control System(DCS)in industries such as power stations,agricultural systems,chemical and water treatment *** of control through DCS,this paper proposes a SCADA and PLC(Programmable Logic controller)system to control the ratio control division and the assembly line division inside the chemical plant.A specific design and implementation method for development of SCADA/PLC based real time ratio control and automated assembly line system in a chemical plant is *** assembly line division is further divided into sorting stage,filling stage and the auxiliary stage,which includes the capping unit,labelling unit and then the *** the ratio control division,we have defined the levels inside the mixer and ratio of the raw materials through human machine interface(HMI)*** ratio of raw materials is kept constant on the basis of flow rates of wild stream and manipulated *** is a flexibility in defining new levels and the ratios of the raw materials inside the *** here we taken the predefined levels(low,medium,high)and ratios(3:4,2:1,2:5).control valves are used for regulating the flow of the *** the assembly line division,the containers are sorted on the basis of size and type of material used i.e.,big sized metallic containers and small sized non-metallic containers by inductive and capacitive proximity *** the processes are facilitated with laser beam type or reflective type sensors on the conveyor *** a highly stable and dependable PLC/SCADA system instead of Distributed control System is required to achieve automatic management and control of chemical industry processes to reduce

关键词： Industry 4.0 ratio control automation PLC SCADA control valves proximity sensors conveyor system solenoid valves

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Separate control of High Frequency Electro-hydraulic Vibration Exciter

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Chinese Journal of Mechanical Engineering 2011年第2期24卷 293-302页

作者： JIA Wen＇ang RUAN Jian REN Yan The Key Laboratory of Mechanical Manufacture and Automation of Ministry of Education Zhejiang University of Technology Hangzhou 310032 China

The working frequency of the conventional electro-hydraulic vibration exciters,which consist of a servo valve and a hydraulic cylinder,is generally restricted within a narrow range due to limited frequency response capability of the servo valve *** counteract such restriction,a novel scheme for an electro-hydraulic vibrator,controlled by a two-dimensional valve（2D valve） and a bias valve in parallel,is therefore *** frequency,amplitude and offset are independently controlled by rotary speed,axial sliding of the spool of the 2D valve and axial sliding of the spool of the bias *** principle of separate control was presented and the regulation approach of frequency,amplitude and offset was discussed.A mathematical model of the hydraulic power mechanism for the proposed vibration exciter was established to investigate the relationship between the amplitude and the axial sliding of the 2D valve＇ spool,as well as that between the offset and the axial sliding of the bias valve＇s spool at various *** experimental system was built to validate the theoretical *** is verified that the 2D exciter is capable of working smoothly in a frequency range of 5- 200 *** its frequency,amplitude and offset can be controlled respectively by either closed loop or open loop *** is a linear relationship between the output amplitude and the spool axial opening of the 2D valve until a point when the flow rate becomes saturate and the amplitude remains *** offset displacement of the cylinder＇s piston is linearly proportional to the axial displacement of the spool of the bias valve,when the valve opening is less than 25%.Thereafter,the slop of the offset curve decreases and tends to *** proposed electro-hydraulic vibration controlled by the 2D valve not only facilitates the realization of high-frequency electro-hydraulic vibration,the high-accuracy of vibration can also be achieved by means of independent controls to the freque

关键词： control valves electro-hydraulic system vibration exciter dynamics characteristics

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