scholarly journals Research of the control system for liquids level maintenance in tanks

2021 ◽  
Vol 29 (1) ◽  
pp. 104-119
Author(s):  
Aleksandr M. Abakumov ◽  
Pavel K. Kuznetsov ◽  
Vladimir P. Kurgan ◽  
Alecsandr A. Goryachkin
Keyword(s):  
Control System ◽  
Quality Indicators ◽  
Transfer Functions ◽  
Block Diagram ◽  
Control Process ◽  
Control Object ◽  
Liquid Level ◽  
Nonlinear Dependence ◽  
Level Control ◽  
Stabilization Control

The problems of controlling the operating modes of pumping units with a frequency-controlled drive based on an asynchronous short-circuited motor are considered. The specific features of the requirements for the control process quality indicators of liquid level stabilization control system for the reservoirs are discussed. Mathematical models of functionally necessary parts of the system are obtained in the form of transfer functions: a frequency-controlled drive with scalar control, a generalized control object, and a feedback sensor. The linearized model of the controlled object taking into consideration a nonlinear dependence of the the torque at the motor shaft on rotational speed is obtained in the form of a transfer function of the aperiodic unit. A block diagram of a closed loop liquid level control system has been developed. It is shown that the use of standard settings for the system under consideration, focused on maximum performance achievement, can leads to unacceptable values of control action speed variations and hence to generation of hydraulic shocks that decreases a wear of kinematic parts of the unit. A method for the synthesis of the controller is proposed, which takes into account the limitations on the quality indicators of the transient process of a speed variation of the pump unit when control system counteracts main disturbances. The synthesis of controller is carried out for an example of a specific installation and the results of modeling transients of a control system and perturbing effects are discussed.

The Study on Liquid Level Control System Based on PLC and WinCC

2013 ◽  
Vol 336-338 ◽  
pp. 1292-1295
Author(s):  
Min Zhao ◽  
Cai Yun Ren ◽  
Dong Liang Lei ◽  
Feng Lian Qi
Keyword(s):  
Control System ◽  
Control Process ◽  
Liquid Level ◽  
Control Technique ◽  
Level Control ◽  
Level Control System ◽  
Plc Control ◽  
Ac Motors ◽  
Machine Interface ◽  
Liquid Level Control

Based on the PLC control technique and WinCC configuration technology,the control system for the liquid level of the tank was designed. After receiving liquid level signal that transferred from radar tester,the PLC process it ,and then output related control signal to the actuator.The actuator is composed of two AC motors,one is for the main pump ,and another for the auxiliary pump.The function of human-machine interface is achieved with the help of Smart700 touch screen of Siemens.Communication functions between the WinCC project and the PLC site and pictures of the control process which enabals real-time monitoring of the entire system are finished by designing configuration.Finally,the validity of the system and the feasibility of the design have been proved by debugging and the use of enterprises.

Developing and Research on Liquid Level Control System of Double-Tank

2013 ◽  
Vol 397-400 ◽  
pp. 1200-1203
Author(s):  
Rui Li Chang ◽  
Jun Han ◽  
Guo Wei Cui
Keyword(s):  
Control System ◽  
Control Object ◽  
Reference Value ◽  
Configuration Software ◽  
Liquid Level ◽  
Practical Significance ◽  
Mathematics Model ◽  
Level Control ◽  
Level Control System ◽  
Liquid Level Control

In the paper, the liquid level control system of double-tank is built, which bases on MCGS configuration software. Taking the liquid levels of double-tank as control object, the mathematics model is built, which is used for experiment and research. Moreover, the liquid level PID adjustor of single tank is designed, and P, PI and PID experiments are done in the step signal, which has important practical significance and reference value.

Automation of Concrete Heat Treatment in Thermoactive Formwork in Monolithic Housing Construction

2020 ◽  
Vol 897 ◽  
pp. 250-254
Author(s):  
Anatoly Fedorovich Tikhonov
Keyword(s):  
Heat Treatment ◽  
Mathematical Model ◽  
Control System ◽  
Transfer Functions ◽  
Block Diagram ◽  
Control Object ◽  
Housing Construction ◽  
Control Actions ◽  
Concrete Mix ◽  
Concrete Temperature

The block diagram and algorithm for concrete treating in thermoactive formwork is presented. Article presents parameters of the concrete mix, to enter in a command block before automated heating of the concrete mix in thermoactive formwork in accordance with the schedule of changes in concrete temperature in the process of obtaining desired strength. Article formulates mathematical model of the control object for thermal treatment of concrete with consideration of the specifics and general patterns, processes and technological requirements. Article determined control actions, transfer functions of the object and phase graph of the control system.

Design of Three-Tank Liquid Level PID Control System Based on Virtual Instrument

2013 ◽  
Vol 273 ◽  
pp. 650-653
Author(s):  
Yan Xin Yu ◽  
Ming Qiu Li ◽  
Zeng Yang Zhao
Keyword(s):  
Control System ◽  
Pid Control ◽  
Virtual Instrument ◽  
Control Process ◽  
System Structure ◽  
Liquid Level ◽  
Test Results ◽  
Level Control ◽  
High Intelligence ◽  
Control Procedures

On the basis of three-tank liquid level control system structure and the corresponding mathematical model, the simulation model of PID control system is established based on the Simulink environment. The control procedures are designed based on the platform of virtual instrument. Through the different setting parameters, we can achieve real-time monitoring and dynamic simulation of the entire control process. The test results are very close to the simulation results. The system can achieve the ideal control, and has the advantages of convenient operation, high intelligence, high precision and so on.

scholarly journals АНАЛИТИЧЕСКОЕ КОНСТРУИРОВАНИЕ РАЗОМКНУТЫХ СИСТЕМ СТОХАСТИЧЕСКОГО УПРАВЛЕНИЯ МНОГОМЕРНЫМ НЕЛИНЕЙНЫМ ОБЪЕКТОМ

2017 ◽  
Vol 8 (3) ◽  
Author(s):  
Л. Н. Блохин ◽  
С. И. Осадчий ◽  
В. А. Зозуля
Keyword(s):  
Control System ◽  
Transfer Functions ◽  
Block Diagram ◽  
Control Object ◽  
Metrological Certification ◽  
Open Loop ◽  
Problem Solution ◽  
Loop Control ◽  
Control Signals ◽  
Random Components

This article is devoted to the development of a new method of synthesis a regulators’ transfer functions matrix of an optimal multivariable open-loop control system. The regulator is designed to maximize an accuracy of a nonlinear multivariable control object transition from one steady state to another. It is assumed that disturbances act on the control object and sensors measuring data has inertia and noise. Both disturbances and noises are an additive combination of regular and random components. Random components belong to a class of interconnected stationary processes with rational spectral density matrices. A substantiated method differs from the known one by the fact that during formulation and solution of the problem somebody uses a new block diagram of the control system, which takes into account the results of metrological certification of a sensor dynamics. Synthesis of the regulator is carried out in the frequency domain by the Wiener-Kolmogorov method. A new algorithm, which is obtained as a result of synthesis problem solution, allows you to find the matrix of regulator transfer functions , which provides a minimum of corresponding quadratic quality criteria’s. The first of them is equal to the sum of certain way weighted squared deviations regular repetition errors of the object path and control signals. The second criterion is equal to the sum of the weighted variance of the random error components and the control signals. To execute the proposed algorithm it is necessary to perform the operations of Wiener factorization and separation of rational matrices. The corresponding functions are contained in the freely distributed software package SciLab.

scholarly journals RESEARCH OF LIQUID LEVEL CONTROL SYSTEM / SKYSČIO LYGIO VALDYMO SISTEMOS TYRIMAS

2015 ◽  
Vol 7 (3) ◽  
pp. 317-322
Author(s):  
Dominykas Beištaras
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Fuzzy Logic Controller ◽  
Liquid Level ◽  
Water Tank ◽  
Level Control ◽  
Level Control System ◽  
Filling Time ◽  
Control System Model ◽  
Liquid Level Control

This paper presents liquid level control system model and analysis of dynamic characteristics. The system consists of scalar controlled induction motor drive, fuzzy logic controller, water tank and centrifugal pump. Simulink models of water tank, pump and controller are presented. The simulation of the system shows that the use of fuzzy logic controller reduces valve opening time and reservoir filling time. Nagrinėjamas skysčio lygio valdymo sistemos imitacinių modelių sudarymas, analizuojamos dinaminės charakteristikos. Valdymo sistema sudaryta iš skaliariniu būdu valdomos dažninės elektros pavaros su neraiškiosios logikos reguliatoriumi, vandens rezervuaro ir išcentrinio siurblio. Sudaryti rezervuaro, siurblio ir reguliatoriaus Simulink modeliai. Atlikus imitacijas gauta nedimensinė siurblio charakteristika, apibūdinanti siurblio veikimą, esant bet kokiam sukimosi greičiui. Nustatyta, kad sistemoje su neraiškiosios logikos reguliatoriumi vožtuvas yra atidaromas greičiau nei sistemoje su proporcinguoju integraliniu (PI) reguliatoriumi, ir todėl sumažinama rezervuaro pripildymo trukmė.

Sign in / Sign up

Export Citation Format

Share Document