Control system simulation by modular uninterruptible power supply unit with adaptive regulation function

The paper considers the issue of improving the methods of uninterruptible power supply intelligent control based on adaptive algorithms with the use of artificial neural network technologies. An adaptive PID regulation method of the UPS battery charge current is proposed. A neural network based control scheme with adjustment of PID regulation coefficients has been developed. The simulation modeling was used to search for the artificial neural network topology, which would be the most effective according to the criteria of the battery charge current regulation accuracy. The use of artificial neural networks in the uninterruptible power supply control system made it possible to obtain more effective results for maintaining a stable battery charge current in the transient.

mentioning

confidence: 99%

Adaptive pid regulation method of uninterruptible power supply battery charge current based on artificial neural network

Palamar¹,

Stadnyk²,

Palamar³

2022

Methods and means of increasing the reliability of computerized modular uninterruptible power supply system

Palamar¹

2020

The problem of development and implementation of a simple and effective method of the rectifiers operation control for the modular uninterruptible DC power supply unit in order to increase its reliability is considered in this paper. The main idea of the method is to control the process of cyclic shifting of the switched-on power modules of the uninterruptible power supply by series switching into operation of each subsequent module from their unloaded reserve and switching out the previous one. The paper presents the control system structure where in addition to the central control module, it is proposed to add the control unit for power modules, which is responsible for implementing the process of their switching on and monitors their condition. In order to investigate the effectiveness of the proposed method, computer simulation model describing the power modules control logic is developed. The Simulink visual modeling environment and the mathematical tools of the Stateflow library component using state and transition diagrams are used in order to develop the simulation model. The developed simulation model is tested and the simulation results are given in the form of time diagrams of state change. The іmplementation of the developed method, due to the uniform reduction of the period during which the power modules of the uninterruptible power supply are on the switched-on loaded state, makes it possible to increase their operating time to failure, which in turn increases its reliability without deteriorating energy efficiency. The simulation results demonstrate the efficiency of the developed algorithm in various system operation modes. Based on the proposed method, hardware and software which is implemented as a part of intelligent computerized control system for uninterruptible DC power supply is created.

Progressive web technology-based improvement of the distance learning adaptive system

Pikuliak¹,

Lazarovych²,

Usyk³

2022

An analysis of the well-known distance education systems was made, which allowed us to highlight their advantages and disadvantages and identify some ways to improve the program by adding adaptive functionality and interactivity, aimed at improving the educational process quality. An interface for working with the system for different groups of users (students, teachers, developers) has been developed whose use allows you to download study materials and test tasks conveniently, to edit and adapt some meaningful links between information sections (Units), to pass training and test control, to form final reports of success and recommendations for further learning steps. The multi-set method of assessing the level of study of content units was described and the adaptive functionality of forming the content of educational lectures for review or in-depth mastering of the theoretical content was presented, which allows taking into account the initial level of student knowledge and his/her abilities to acquire new skills. The software has been improved with a system based on PWA (Progressive web app) technology, which has allowed us to realize such advantages of web applications as speed, convenience, and attractiveness. A technology of text questions and correspondent information units connection was proposed which was based on the theory of multiple approach use which has provided us with the mathematical determination of the indices of the unmastered pieces of knowledge which generate the text part of the adaptive training step. Implementation of PWA technology was performed using the following software tools Service Worker, Web App Manifest, HTTPS, and Application Shell, which allowed to perform client caching offline, speeded up the process of downloading and displaying graphic elements of the web page, provided the use of the proposed resource as a regular mobile application. It has made it possible for easy access to the system to be obtained as well as the system resource use to be reduced.