2021 International Conference "Electrical, Electronic and Information Sciences“ (eStream)https://etalpykla.vilniustech.lt/handle/123456789/1593962026-04-11T17:55:53Z2026-04-11T17:55:53ZModelling of Six-Phase Electric Drive with PI and PD Fuzzy ControllersRinkevičienė, RomaMitkienė, BronėUdris, Dainiushttps://etalpykla.vilniustech.lt/handle/123456789/1595802025-12-17T12:50:12Z2021-01-01T00:00:00ZModelling of Six-Phase Electric Drive with PI and PD Fuzzy Controllers
Rinkevičienė, Roma; Mitkienė, Bronė; Udris, Dainius
The paper presents model of field-oriented control six-phase induction drive with fuzzy controllers. Two types of fuzzy controllers were designed and implemented in the model. PD and PI fuzzy controllers, with the same per unit membership functions and 49 rules were used to replace conventional PI controller. Simulation results of controlled parameters indicate that both controllers create robust systems.
2021-01-01T00:00:00ZPossibilities of Decreasing Induction Motor Bearing CurrentsKudelina, KarolinaVaimann, ToomasRassõlkin, AntonKallaste, Antshttps://etalpykla.vilniustech.lt/handle/123456789/1595792025-12-17T12:38:54Z2021-01-01T00:00:00ZPossibilities of Decreasing Induction Motor Bearing Currents
Kudelina, Karolina; Vaimann, Toomas; Rassõlkin, Anton; Kallaste, Ants
This paper describes possibilities for reduction of bearing currents in induction motors. Growing usage of motors running with variable speed drives, the problems of bearing currents and related damages have become a significant issue in industry. Bearing currents cause a higher portion of faults in induction machines. Therefore, the maintenance question is getting a great importance. The paper addresses a problem of bearing currents and lists different methods for their avoidance. This study gives a comparison of the methods, discussing advantages and disadvantages of each of them.
2021-01-01T00:00:00ZSecurity Benefits and Drawbacks of Software-Defined NetworkingMelkov, DmitrijPaulikas, Šarūnashttps://etalpykla.vilniustech.lt/handle/123456789/1595782025-12-17T12:03:23Z2021-01-01T00:00:00ZSecurity Benefits and Drawbacks of Software-Defined Networking
Melkov, Dmitrij; Paulikas, Šarūnas
Security elements of data communication networks such as packet filters, firewalls, intrusion detection and prevention systems are in first line of defense against cyber security threats and various attacks such as DDoS and many others. With constantly increasing demand of compute power and grow of various cloud services, complexity of traditional networks makes it more difficult to maintain security policies in fast and safe manner. To simplify management and overcome limitations of traditional networks concept of software-defined networking (SDN) was proposed. The main idea of SDN is separation of control and data planes of devices. Combined control plane into network controller brings intelligence into network and open wider possibilities for automation. Separated data plane makes it possible for devices to run in headless mode during critical situations when control plane is not functioning. SDN also simplifies managing of security policies, it helps to ensure intime deploying and minimize possibility of mistake. However, SDN architecture has some places which can be used as main point of cyber-attack. Purpose of this paper is to describe security benefits and drawbacks of software-defined network.
2021-01-01T00:00:00ZPreliminary Sensors Selection for Reconfigurable Continuous Track Robot Obstacle DetectionValme, DaniilKudelina, KarolinaRassõlkin, Antonhttps://etalpykla.vilniustech.lt/handle/123456789/1595772025-12-17T11:33:00Z2021-01-01T00:00:00ZPreliminary Sensors Selection for Reconfigurable Continuous Track Robot Obstacle Detection
Valme, Daniil; Kudelina, Karolina; Rassõlkin, Anton
Nowadays, the topic of autonomous vehicles is attracting attention. Such technologies and innovative approaches can help to facilitate people's life in different. However, practical implementation of autonomous vehicles requires innovation in different spheres such as regulations, cybersecurity, and ethics. The demand for applying autonomous vehicles in rugged terrain conditions is growing, bringing new challenges for both obstacle overcoming and detection. This paper describes a process of preliminary sensors selection obstacle detection in an autonomous continuous track robot. Different sensors are studied and chosen for a particular case. The initial algorithm for robot navigation is proposed.
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