Oleksiy V. Kozlov

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.

The Algorithm of Optimal Polynomial Extrapolation of Random Processes

This work deals with the modelling and prediction of the realizations of random processes in corresponding future time moments. The extrapolation algorithm of nonlinear random process for arbitrary quantity of known significances and random relations used for forecasting has been received on the basis of mathematical instrument of canonical decomposition. The received optimal solutions of the nonlinear extrapolation problem, as well as the canonical decomposition, that was use as a base for optimal solution, does not set any substantional restrictions on the class of investigated random process (liniarity, Markov processes propety, stationarity, monotonicity etc.). Theoretical results, block-diagrams for calculation procedures and the analysis of applied applications, especially for the prediction of economic indexes and parameters of technical devices, are under discussions.

Synthesis and Research of Neuro-Fuzzy Model of Ecopyrogenesis Multi-circuit Circulatory System

This paper presents the development of the neuro-fuzzy mathematical model of the ecopyrogenesis (EPG) complex multiloop circulatory system (MCS). The synthesis procedure of the neuro-fuzzy model, including its adaptive-network-based fuzzy inference system for temperature calculating (ANFISTC) training particularities with input variables membership functions of different types is presented. The analysis of computer simulation results in the form of static and dynamic characteristics graphs of the MCS as a temperature control object confirms the high adequacy of the developed model to the real processes. The developed neuro-fuzzy mathematical model gives the opportunity to investigate the behavior of the temperature control object in steady and transient modes, in particular, to synthesize and adjust the temperature controller of the MCS temperature automatic control system (ACS).

Mathematic Modeling of Reactor’s Temperature Mode of Multiloop Pyrolysis Plant

The paper considers the synthesis of mathematical model of temperature mode of multiloop pyrolysis plant’s (MPP’s) reactor as a complexed control object with distributed parameters. The results of computer simulation as diagrams of transient processes of different points heating of multiloop pyrolysis plant reactor’s workspace are obtained on the basis of developed model. The analysis of simulation results for different temperature modes confirms the adequacy of the mathematic model of the reactor to real processes. The developed model can be used for synthesis of automatic control systems of the MPP’s reactor heating temperature.

Synthesis and research of neuro-fuzzy observer of clamping force for mobile robot automatic control system

This paper is dedicated to solving the problem of a fuzzy observer development for the clamping force automatic control system of a mobile robot with magnetically-operated drivers for moving on inclined and vertical ferromagnetic surfaces. An approach based on physical rules of field theory to determine the clamping forces of electromagnets is also considered. The authors propose to synthesize the clamping force observer using hybrid neuro-fuzzy systems based on experimental data. The analysis of computer simulation results in the form of static characteristics graphs of the force observer confirms the high accuracy of the developed neuro-fuzzy observer to the real processes.

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.

Control processes of floating docks based on SCADA systems with wireless data transmission

In this paper the approach of automation of control processes of floating docks parameters on the basis of SCADA systems with wireless data transmission is presented. The hierarchical structure of SCADA system for floating docks docking operations, which has the decentralized information processing as well as individual software and hardware components, is given. The specialized human-machine interface for visual display of functioning of the floating docks docking operations SCADA system is designed. The efficiency of the proposed SCADA system is tested on the developed experimental stand.

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.

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.