Oleksiy V. Korobko

PLC-Based Systems for Data Acquisition and Supervisory Control of Environment-Friendly Energy-Saving Technologies

This paper presents the development of PLC-based systems for data acquisition and supervisory control of environment-friendly energy-saving complex high-tech technologies. The functional structure and main components of PLC-based SCADA-systems for environment-friendly energy-saving technological processes are given. The examples of SCADA applications in design of PLC-based systems for monitoring and automatic control of (a) ecopyrogenesis (EPG) and (b) thermoacoustic technological processes are presented. Paper considers the criteria of energy and economic efficiency of the EPG technological process. The functional structures, software and hardware implementation as well as multi-level human-machine interfaces of the developed PLC-based systems for data acquisition and supervisory control are given. Considerable attention is given to particular qualities of computing of ecopyrogenesis and thermoacoustic processes technological parameters by the proposed SCADA-systems. The developed PLC-based SCADA-systems provide: significant increasing of energy and economic efficiency criteria of the EPG and TAD complexes, high precision control of both technological processes, monitoring of current technological parameters, using the indirect methods for parameters measuring and identifying, and automatic control with high quality indicators and optimal parameters.

Green-IT Approach to Design and Optimization of Thermoacoustic Waste Heat Utilization Plant Based on Soft Computing

Thermoacoustic devices (TAD) are the newest type of unconventional heat machines. Their work is based on the mutual transformation of heat and acoustic energies. This heat machines are characterized by high sensitivity to the working fluid properties (viscosity, density) as well as the environment effects (temperature, pressure, etc.). An effective work of TAD is possible only if the different nature values of the internal parameters (acoustic, hydrodynamic, thermal) are stabilized. The prospective area for thermoacoustic heat machines is their use in the waste energy recovery systems due to their ability to work with both high potential and low potential supplied heat. As the source of waste heat in such systems can be used the exhaust gases after the catalytic converters, or, taking into account latest results in low potential energy utilization with TAD, even the temperature of cooling water (about 90 °C). This paper is devoted to the synthesis of intelligent digital system for control of thermoacoustic plant with providing optimal working conditions for increasing its efficiency. Authors synthesize the fuzzy controllers of Mamdani and Sugeno types for the created control system. Designed fuzzy controllers are compared with a traditional PD controller in terms of their operation speed and accuracy. Special attention is paid to green-IT approach for design of embedded fuzzy systems by the optimization of fuzzy controllers based on the different type and parameters of linguistic terms for input and output signals as well as on minimization of fuzzy rules quantity in the preliminary synthesized fuzzy rule bases. The results of comparative analysis of initial and optimized fuzzy controllers are discussed in detail.

Distributed computer system for monitoring and control of thermoacoustic processes

This paper discusses the synthesis of distributed computer system for monitoring and control of thermoacoustic processes. Based on the analysis of existing monitoring systems, authors show the main tasks of the synthesized system as well as describe its structure and main components. Created distributed computer system (DCS) is then tested on the experimental thermoacoustic installation. Using the data obtained authors describe the approach for thermoacoustic systems control by the adjustments in the resonator length of the thermoacoustic device.

Frequency Tuning Algorithm for Loudspeaker Driven Thermoacoustic Refrigerator Optimization

Article describes the experimental method of acoustic pressure amplitude-frequency response measurement in resonator of thermoacoustic refrigerator with electromechanical generator of acoustic oscillations. Based on the results obtained the nonlinear mathematical model of thermoacoustic refrigerator with electromechanical generator is synthesized using the statistical methods of construction and evaluation of pairwise dependencies. The resonance frequency identification algorithm for thermoacoustic system parametric optimization is developed using the obtained mathematical model. Experimental verification of the proposed resonance frequency identification algorithm is considered.

PLC based system for remote liquids level control with radar sensor

Article describes the designed by the authors PLC based system for remote level control with radar sensor. Developed system uses the radar sensor readings. Based on the hardware, required to measure the operating parameters of tanks, authors proposed a distributed structure of the level control system that is described in details. The interaction between main components and human-machine interface of the system is considered. Resulted system is then tested on experimental setup.

Multisensor data acquisition system for thermoacoustic processes analysis

This article is devoted to structural and algorithmic design of remote data acquisition system for thermoacoustic (TA) processes. It applies the problems of low potential secondary energy utilization using thermoacoustic technologies. Article describes experimental studies of thermoacoustic refrigerator performance depending on the form of sound wave.

Automation of control processes in specialized pyrolysis complexes based on web SCADA systems

The paper describes Web SCADA Systems, designed by the authors, for monitoring and automation of control processes in the specialized pyrolysis complexes (SPC) for municipal polymeric waste (MPW) utilization. The functional structure and main components of the generalized SPC Web SCADA system are given. The specific example of the proposed SPC Web SCADA system application is also presented. Considerable attention is given to particular qualities of the functional structure, software and hardware implementation as well as multi-level human-machine interface (HMI) of the developed Web SCADA system for monitoring and automatic control of SPC main process parameters.

Synthesis and Optimization of Fuzzy Controller for Thermoacoustic Plant

The paper is devoted to the synthesis of digital system for control of thermoacoustic plant. Based on the analysis of thermoacoustic systems, the main tasks of the synthesized system are shown. Its structure and main components are described. Using the created system, the traditional PD and fuzzy Mamdani and Sugeno controllers are implemented and compared. Best regulator is then additionally tuned using the described input terms optimization procedure. The comparative analysis of initial and optimized controllers is shown using graphs.

Complex Industrial Systems Automation Based on the Internet of Things Implementation

This paper presents the analysis of the Internet of Things (IoT) approach and its application for the development of embedded monitoring and automatic control systems (EMACS) for technological objects and processes that are included in complex industrial systems. The functional structure and main components of the generalized embedded monitoring and automatic control system for complex technological objects and processes based on IoT approach are given. The examples of IoT applications in design of specialized EMACS for such complex technical objects as gas turbine engines, floating docks and specialized pyrolysis complexes (SPC) are presented. Considerable attention is given to particular qualities of the functional structures, software and hardware implementation as well as multi-level human-machine interfaces (HMI) of the developed embedded systems for monitoring and automatic control of main process parameters. The developed EMACS based on IoT approach provide: high precision control of operating processes of gas turbine engines, floating docks and SPCs in the real time mode, monitoring and automatic control of their current technological parameters with high quality indicators, that leads to significant increasing of energy and economic efficiency of both given complex technical objects.

Pulse-phase control system for temperature stabilization of thermoacoustic engine model driven by the waste heat energy

This paper considers the task of controlled power source creation for hot heat exchanger of thermoacoustic engine, thus making it suitable to study the waste heat driven thermoacoustic systems. Authors propose the usage of pulse-phase control system based on triac. The hardware realization of proposed system and the results of simulation are described in details.