Application and Research of the Intelligent Management System Based on Internet of Things Technology in the Era of Big Data

With the in-depth application of the Internet of Things, many emerging technologies are changing the global industry landscape on an unprecedented scale. At the same time, they also provide an opportunity for the development of intelligent management to break through the bottleneck. The proposal and evolution of the concept of intelligent management makes the development of management technology more advanced. Therefore, the introduction of the Internet of Things technology into intelligent management has very important research significance and value. First, conduct research on the origin and current situation of the Internet of Things technology at home and abroad and understand the relevant theories and cutting-edge technologies of the Internet of Things technology. Second, take the enterprise as an example to study the process flow and existing problems in the logistics link in the factory, combine the management concept of the Internet of Things, and integrate IC card identification technology, RFID radio frequency identification technology, barriers and ground sensing technology, and OPC/PLC. Third, combined with PLC/OPC technology, the design and integration of the software system and hardware system are realized. The experimental results show that the system modules have been tested to provide company information management, employee multifactor predictive analysis, and efficient batch efficiency evaluation, which has a certain value for company data management and data analysis and mining, and improve company efficiency by more than 30%.

Modeling of acetylene synthesis process in ChemCAD and features of SCADA connection using OPC technology

The article examines the features of constructing mathematical models in modern universal modeling programs and their further use using OPC technology in control systems for processes of chemical technology based on SCADA systems. The objective is to study the features of information exchange using OPC technology between the universal ChemCAD simulator and the modern SCADA system TRACE-MODE 6 using the example of a mathematical model of a kinetic reactor for the synthesis of acetylene. To achieve this goal, a mathematical model of a kinetic reactor for the synthesis of acetylene based on a model of a continuous stirring reactor has been developed in the ChemCAD simulation software environment. The reactor was tuned and the parameters of material flows were experimentally selected. A study of the process of synthesis of acetylene was carried out according to a mathematical model, a graphical dependence of the yield of acetylene on temperature was obtained and its analysis was carried out, according to the results of which the temperature providing the maximum yield of acetylene was established. With the help of OPC technology, information exchange between the model and the control system of the acetylene synthesis process is carried out, which is based on the modern SCADA system TRACE-MODE 6. A graphical dependence is obtained describing the transient process of the system through the acetylene output channel when using a PID controller and perturbing with a change in the task. The analysis of the transient process revealed the absence of transport lag, which is explained by the calculated nature of the control object and is impossible for a real technological process. To solve the problem, an experiment was carried out, according to the results of which a method for emulating transport lag using the functionality of the information channels of the SCADA system was proposed. The graph of the transient process of the system through the acetylene outlet channel was obtained, which confirms the effectiveness of the proposed method of emulation of transport delay when using external calculation models in SCADA systems. Keywords: mathematical modeling, universal modeling programs, OPC, control systems, SCADA-based control, TRACE-MODE, ChemCAD.

МОДЕЛЮВАННЯ ХІМІКО-ТЕХНОЛОГІЧНИХ ПРОЦЕСІВ У SCADA ЗА ДОПОМОГОЮ ТЕХНОЛОГІЇ OPEN PLATFORM COMMUNICATIONS

The subject of study in the article are methods for integrating mathematical models of chemical-technological processes implemented in universal modeling programs into modern SCADA systems for developing and improving methods for controlling these processes. The goal is to develop a control system for the synthesis of acetylene in a kinetic reactor, based on a computer model created in universal modeling programs and integrated into SCADA using open platform communications (OPC) technology. Tasks: to create a mathematical model of the process of synthesis of acetylene based on the selected universal modeling program; to develop a way to integrate the resulting model into modern SCADA using OPC technology; to develop in SCADA a control system for the process of synthesis of acetylene according to a mathematical model as part of a functional human-machine interface and control subsystem algorithms; get transient graphs and prove the efficiency of the control system. Conduct a process study using a mathematical model. The methods used are computer simulation of technological processes; OPC technology; SCADA based management. The following results are obtained. A control system for the acetylene synthesis process based on SCADA Trace-Mode and a mathematical model implemented in the ChemCAD package has been developed, while the model - control system information exchange is implemented based on OPC technology. Checked and proved the efficiency of the resulting control system. A mathematical study of the process was carried out, an experimental dependence of the yield of the final product, acetylene, on the temperature, and consumption of raw materials at the inlet of the reactor was established. Conclusions. The novelty of the results is as follows. A new method is proposed for integrating mathematical models implemented in the ChemCAD modeling package into modern SCADA, based on OPC technology. A study of the process of acetylene synthesis by a mathematical model was carried out, experimental dependences of the acetylene yield on temperature and ethylene consumption at the inlet of the synthesis reactor were obtained. An analysis of the obtained experimental dependences showed the need to use cascade control algorithms to increase the efficiency of controlling the process of acetylene synthesis in a kinetic reactor.

Vibration Control of Blade Section Based on Sliding Mode PI Tracking Method and OPC Technology

Vibration control of the blade section of a wind turbine is investigated based on the sliding mode proportional-integral (SM-PI) method, i.e., sliding mode control (SMC) based on a PI controller. The structure is modeled as a 2D pretwisted blade section integrated with calculation of structural damping, which is subjected to flap/lead-lag vibrations of instability. To facilitate the hardware implementation of the control algorithm, the SM-PI method is applied to realize tracking for limited displacements and velocities. The SM-PI algorithm is a novel SMC algorithm based on the nominal model. It combines the effectiveness of the sliding mode algorithm for disturbance control and the stability of PID control for practical engineering application. The SM-PI design and stability analysis are discussed, with superiority and robustness and convergency control demonstrated. An experimental platform based on human-computer interaction using OPC technology is implemented, with position tracking for displacement and control input signal illustrated. The platform verifies the feasibility and effectiveness of the SM-PI algorithm in solving practical engineering problems, with online tuning of PI parameters realized by applying OPC technology.

INTEGRATED HANDS-ON AND REMOTE PID TUNING LABORATORY

University control engineering coursesusually focus on Proportional Integral Derivative (PID)controllers. Moreover PID controllers are used in morethan 90% of the industrial control applications, becausethey are relatively cheap, easy to use, and robust enoughfor most industrial applications. However, universityteaching attaches most importance to the theoreticalknowledge of PID controllers, rather than the practicalskills required to support the use of these controllers inindustry. In addition, the cost and space challengesassociated with hands on laboratories make simulationbased laboratories a more attractive option for teachingPID controllers. Unfortunately, simulations do notcapture the complexity of control systems that areimportant to develop the practical skills of students. Inthis paper, we present a laboratory setup that is used toteach practical skills in PID tuning. The system controlsthe temperature of a small fictitious house whosetemperature is affected by an uncontrolled heating sourceand blow fan. The PID data is accessible to the systemuser through OLE( Object Linking & Embedding) forProcess Control, also referred as Open ProcessControl(OPC) technology. This technology allows thesystem to be used as a hands-on or remote laboratory,which allows students to learn the complexity of PIDcontrollers, while removing the time and spaceconstraints imposed by purely hands on laboratories.Being accessible remotely, the setup enables andencourages instructors to include demonstrations of PIDtuning into their lectures