scholarly journals Using Special Filter with Membership Function in Biomass Combustion Process Control

2018 ◽  
Vol 8 (8) ◽  
pp. 1279 ◽  
Author(s):  
Jana Mižáková ◽  
Ján Piteľ ◽  
Alexander Hošovský ◽  
Martin Kolarčík ◽  
Madhawa Ratnayake
Keyword(s):  
Control System ◽  
Process Control ◽  
Membership Function ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Membership Functions ◽  
Filtration Method ◽  
On Line ◽  
System Data

The paper deals with the special filtration method using a filter with membership function. The paper presents a model of a filter, its specific characteristics and some parameters that have an impact on quality of filtration. A filter with different membership functions (Gauss, Bell, Power and Triangle) was designed and tested for specific demands, which followed from the experience with the realization of a biomass combustion control system. Data obtained from the combustion process were extremely noisy (influenced by various transfer errors, disturbances and external interferences) and, therefore, had to be properly filtered. The paper also describes some results of filter simulation in the Matlab Simulink environment and its implementation into an on-line monitored process control system of biomass combustion. It was proven by implementation that such a filter can be useful for the signal filtering of oxygen concentration and carbon monoxide emission sensing and it can be very useful in reducing signal interferences arising in biomass combustion.

scholarly journals Biomass Combustion Control in Small and Medium-Scale Boilers Based on Low Cost Sensing the Trend of Carbon Monoxide Emissions

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2030
Author(s):  
Jana Mižáková ◽  
Ján Piteľ ◽  
Alexander Hošovský ◽  
Ivan Pavlenko ◽  
Marek Ochowiak ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Control System ◽  
Process Control ◽  
Block Diagram ◽  
Low Cost ◽  
Combustion Process ◽  
Quality Parameters ◽  
Biomass Combustion ◽  
The Real ◽  
Medium Scale

The article deals with the possibility of efficient control of small and medium-scale biomass-fired boilers by implementing low-cost sensors to sense the trend of carbon monoxide emissions into control of the biomass combustion process. Based on the theoretical analysis, a principle block diagram of the process control system was designed for the possibility of providing near-optimal control of the biomass combustion regardless of its quality parameters. A cost-effective hardware solution to obtain the dependence of CO emissions on O2 concentration in flue gas during combustion and new control algorithms was implemented into the process control and monitoring system of the biomass-fired boilers to test them in the real operation. A description of the designed control system, a data analysis of the monitored values and their impact on combustion process, and some results of the implemented control of the real biomass combustion process are presented in the article.

Monitoring of Operating Conditions of Biomass Combustion Process

2013 ◽  
Vol 308 ◽  
pp. 153-158 ◽  
Author(s):  
Jana Boržíková ◽  
Jozef Mižák ◽  
Ján Piteľ
Keyword(s):  
Carbon Monoxide ◽  
Control System ◽  
Process Control ◽  
Process Monitoring ◽  
Combustion Process ◽  
Process Control System ◽  
Operating Conditions ◽  
Biomass Combustion ◽  
Process Variables ◽  
Technical Realization

This paper describes technical realization of operation monitoring of biomass combustion process. Due to specific properties of biomass fuel and specific demands for economic and ecological conditions of operation of biomass combustion devices, process control system has to be monitored. During process monitoring problem with sensing process variables occurs and that’s why this paper also deals with a method of signal filtration of carbon monoxide and oxygen concentration, because signal includes an interference parts.

scholarly journals Algorithm for controlling the process of buffer wastewater neutralization

2021 ◽  
pp. 27-35
Author(s):  
Anatolii Zhuchenko ◽  
Ruslan Osipa ◽  
Liudmyla Osipa ◽  
Lesia Ladieva
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Block Diagram ◽  
Domestic Wastewater ◽  
Automated Control ◽  
Diagram Method ◽  
Industrial Enterprises ◽  
Treatment Facilities

In Ukraine, the condition of surface water near industrial enterprises is extremely critical. The operation of enterprises leads to intensive water pollution with industrial and domestic wastewater. Therefore, improving the quality of treatment facilities through the introduction of automated control systems is an urgent problem. For the operation of automated control systems for typical cleaning processes, a software package is required, which is developed on the basis of appropriate algorithmic software and mathematical models of processes. To obtain them, methods of mathematical and simulation modeling and block diagram method of algorithmization were used. In order to assess the quality of the developed algorithm for controlling the process of buffer wastewater neutralization during operation, a comparison of control system operation based on this algorithm with the most successful foreign variants of neutralization control systems was made. Simulation for the average values of operating parameters Q = 75 m3 / h, CP = 75 g / l, and Ck = 2 g / l at minimum b = 0.02 g / l pH and maximum buffer value b = 0.47 g / l pH, and also with  unidirectional extreme combination of parameters Q = 50 m3 / h, CP = 100 g / l, b = 0,02 g / l pH and Q = 100 m3 / h, CP= 50 g / l, for minimum b = 0.02 g / l pH and maximum buffering value  b = 0.47 g / l pH shows that the best quality of transient processes is for the control system operating on the basis of the developed algorithm. For any combination of parameters, the transients for this control system provide better quality transients. Studies have shown that the control system based on the developed algorithm in comparison with the previously proposed systems provides better process control by reducing the time of transients and reducing the dynamic deviation of the output parameters, which improves the quality of wastewater treatment. Given the non-stationary process and high requirements for the cleaning parameters, manual control of this process is beyond the power of even an experienced operator. The developed mathematical model describing the dynamics of the wastewater neutralization reactor with buffer properties and the process control algorithm made it possible to proceed to the development of the control system software, which is necessary for the automated control of this process.

Aspects Regarding the Influence of Lambda Control System Faults on Pollutant Emissions of Spark Ignition Engines

2016 ◽  
Vol 823 ◽  
pp. 291-296 ◽  
Author(s):  
Ion Lespezeanu ◽  
Florin Marius Militaru ◽  
Octavian Alexa ◽  
Constantin Ovidiu Ilie ◽  
Marin Marinescu
Keyword(s):  
Control System ◽  
Combustion Process ◽  
Fuel Mixture ◽  
Spark Ignition ◽  
Pollutant Emissions ◽  
Spark Ignition Engines ◽  
Engine Emissions ◽  
Exhaust Gases ◽  
Experimental Researches

Flow corrections established based on Lambda control system of spark ignition engines, determines in a decisively way the quality of air-fuel mixture. Faults in the operation of the control system generates deviations of the mixture composition from stoichiometric report, in this way affecting the entire combustion process in engine cylinders. This phenomenon leads, among others, to changes regarding the density of pollutant emissions from exhaust gases. In this context, this paper presents experimental researches made using the simulation of faults that may occur in the control system to highlight their influence on the concentration of engine emissions.

scholarly journals On-Line Tool Monitoring of Tool Wear Chipping/Breakage and Temperature Using Ultrasonic Sensors

1997 ◽  
Author(s):  
N. D. Patel ◽  
P. S. Nicholson
Keyword(s):  
Control System ◽  
Process Control ◽  
Transit Time ◽  
Signal Amplitude ◽  
Process Control System ◽  
Machining Process ◽  
Tool Monitoring ◽  
Ultrasonic Process ◽  
On Line ◽  
Carbide Inserts

High frequency (50–120) MHz, ultrasonic, AIN-sensors have been successfully applied to the study of wear, chipping/breakage and temperature of triangular ceramic and carbide inserts. These sensors readily differentiate between signals from wear and chipping/breakage and, in flight-identify the damage location with simultaneous measurement of signal amplitude and transit time. The signals are unaffected by the machining process. The temperature of the chip/tool interface can be readily obtained during the cutting process by monitoring the transit time. Preliminary studies suggest these sensors also monitor the hardness of the workpiece and the chatter during the cutting. A specially-designed ultrasonic process-control system with 100 ps time resolution with data collection speed 1–10 kHz was necessary to observe the on-line data. The same system integrated with a focused transducer can be used to follow the workpiece dimension and surface finish, on-line. The ultrasonic, process control system that has been developed is robust and can be used for other NDE applications with a resolution of sub-micron thickness. It can also monitor residual stresses.

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