scholarly journals NON-LINEAR TRANSFORMATION OF SIGNALS IN SOFTWARE DESIGN OF DIGITAL CONTROL SYSTEMS COMPLEX

2017 ◽  
Vol 3 ◽  
pp. 140
Author(s):  
Vladimir Aleksandrovich Konevtsov ◽  
Lilia Motaylenko
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Linear Transformation ◽  
Software Design ◽  
Digital Control ◽  
Automatic Control Systems ◽  
Digital Control Systems ◽  
Non Linear ◽  
Linear Elements

Dependencies between signals and dependence of signals on time are strictly non-linear. Non-linear elements, commonly used in the synthesis of automatic control systems, include: a two-point link, a two-point link with hysteresis, a three-point link, a three-point link with hysteresis, a module, saturation with insensitivity.

scholarly journals DIRECT DIGITAL CONTROL IN A COMPLEX OF SOFTWARE DESIGN OF DIGITAL CONTROL SYSTEMS

2017 ◽  
Vol 3 ◽  
pp. 337
Author(s):  
Sergei Verteshev ◽  
Vladimir Konevtsov
Keyword(s):  
Automatic Control ◽  
Programming Languages ◽  
Control Systems ◽  
Software Design ◽  
Digital Control ◽  
Computer Aided Design ◽  
Digital Controllers ◽  
International Standard ◽  
Digital Control Systems ◽  
Direct Digital Control

This article provides the functionality of creating direct digital control devices in the computer-aided design of digital automatic control systems (CAD of digital ACS), in a complex of software design of digital control systems (SDSDC complex) for automated process control systems. Technical tools are defined by the international standard IEC 61131-1: 2003 (Part 1: General data). The possibility of implementing SDSDC complex in direct digital control, single-cycle and multi-cycle ladder diagrams, identification of objects of management and synthesis of digital controllers in comparison with the international standard IEC 61131-3: 2003 (Part 3: Programming Languages) are evaluated. Users’ productivity is estimated as well as the possibility of its separation between the users at different stages of the design of digital systems of automatic control is assessed.

scholarly journals DIRECT DIGITAL CONTROL IN A COMPLEX OF SOFTWARE DESIGN OF DIGITAL CONTROL SYSTEMS

2017 ◽  
Vol 3 ◽  
pp. 332
Author(s):  
Sergei Verteshev ◽  
Vladimir Konevtsov
Keyword(s):  
Automatic Control ◽  
Programming Languages ◽  
Control Systems ◽  
Software Design ◽  
Digital Control ◽  
Computer Aided Design ◽  
Digital Controllers ◽  
International Standard ◽  
Digital Control Systems ◽  
Direct Digital Control

This article provides the functionality of creating direct digital control devices in the computer-aided design of digital automatic control systems (CAD of digital ACS), in a complex of software design of digital control systems (SDSDC complex) for automated process control systems. Technical tools are defined by the international standard IEC 61131-1: 2003 (Part 1: General data). The possibility of implementing SDSDC complex in direct digital control, single-cycle and multi-cycle ladder diagrams, identification of objects of management and synthesis of digital controllers in comparison with the international standard IEC 61131-3: 2003 (Part 3: Programming Languages) are evaluated. Users’ productivity is estimated as well as the possibility of its separation between the users at different stages of the design of digital systems of automatic control is assessed.

scholarly journals Повышение астатизма системы автоматического управления путем введения положительной обратной связи

2020 ◽  
Vol 43 (2) ◽  
Author(s):  
ANDREY KHANNANOV ◽  
KIRA CHUPINA ◽  
VALERY USOLTCEV
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Positive Feedback ◽  
Power Plants ◽  
Proportional Integral ◽  
Automatic Control Systems ◽  
Non Linear ◽  
Additional Positive Feedback

Подчиненные системы автоматического управления (САУ) широко используются в технике, в том числе в судовых энергетических установках. Необходимость ограничения параметров объекта управления, таких как синхронный генератор или судовой электропривод, делает их нелинейными. Применение пропорционально-интегральных регуляторов создает проблему «интегрального насыщения», возникновения свободных движений в САУ при сходе регуляторов с ограничения. Авторами предлагается повысить астатизм САУ и решить проблему «интегрального насыщения» путем введения дополнительной положительной обратной связи с выхода объекта управления в пропорциональный канал регулятора. Эффективность таких САУ исследовалась нами с помощью анализа математических моделей нелинейных САУ и их цифрового моделирования. Результаты исследования: описана математическая модель одного из контуров САУ с дополнительной положительной обратной связью. Доказано, что введение такого вида связи позволяет увеличить астатизм САУ и исключить эффект «интегрального насыщения» при астатизме первого порядка, что повышает точность САУ при отработке управляющих сигналов. Предложен новый способ исключения эффекта «интегрального насыщения» в широкодиапазонных регуляторах напряжения судовых синхронных генераторов промысловых систем освещения без применения аппаратных защитных средств. Таким образом, доказана эффективность введения дополнительной положительной обратной связи на увеличение точности САУ и исключения эффекта «интегрального насыщения». Отмечена низкая чувствительность эффекта введения положительной обратной связи к изменению параметров САУ. Subordinate automatic control systems (SACS) are widely used in engineering inclusive of ship power plants. The need to limit specific parameters of the object makes them non-linear. The use of proportional-integral regulators leads to the problem of integral saturation, the emergence of free movements in SACS when the regulators descend from the limit. The authors propose to increase astatism of SACS and solve the problem of integral saturation by introducing additional positive feedback.

Design of Digital Control Systems by Nonlinear Uncertain Objects

2021 ◽  
Vol 64 (3) ◽  
pp. 68-74
Author(s):  
Vladimir Elsukov ◽  
◽  
Anatoly Gaiduk ◽  
Vjacheslav Lachin ◽  
Alexandr Muzhenko ◽  
...  
Keyword(s):  
Control Systems ◽  
Digital Control ◽  
Design Method ◽  
State Variables ◽  
Automatic Control Systems ◽  
Digital Devices ◽  
Digital Control Systems ◽  
And Control ◽  
Controllability And Observability ◽  
Asymptotic Observers

Minimum-phase nonlinear objects in the conditions of incomplete information about state variables and nonlinearities of the objects are considered. The design method of the digital automatic control systems in the conditions of uncertainty is offered. The decision is received with application of the asymptotic observers and control on state and impact under conditions of full controllability and observability of the controlled objects. This control provides the necessary performance of the control systems. The digital devices algorithm of digital control system is received by sampling of the found control. The efficiency of the developed method is shown on the numerical example. The developed method can be applied to design of digital control systems of production and technological objects of various assignment.

scholarly journals Development of methods to model UAVS nonlinear automatic control systems

2020 ◽  
Vol 11 (30) ◽  
pp. 137-147
Author(s):  
G. S. Vasilyev ◽  
O. R. Kuzichkin ◽  
I. A. Kurilov ◽  
D. I. Surzhik
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Initial Conditions ◽  
Transition Process ◽  
Variable Parameters ◽  
Linear Mode ◽  
Automatic Control Systems ◽  
Destabilizing Factors ◽  
Non Linear ◽  
Aerial Vehicle

When modeling Automatic Control Systems (ACS) of an unmanned aerial vehicle (UAV), it is often necessary to take into account the nonlinearity of an aircraft's reaction when the controls drift, as well as the strong influence of various destabilizing factors that make the system go out of linear mode. When known analytical and numerical methods are used to analyze dynamic systems, it is problematic to obtain general solutions that are valid for the variable parameters of the system under study and, at the same time, provide the required error value. A method has been developed to model dynamic processes in automatic non-linear UAV control systems based on linear approximation by parts and crosslinking of partial solutions with consideration of the initial conditions. An example of using the technique to model the transition characteristics of an ACS UAV with a single non-linear link is considered. Based on the analysis of errors in the calculation of the transition process, the effectiveness of the proposed approach is shown.

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