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Users or customers of the electrical power systems must pay attention to some factors during operation and design of these systems in order to operate safe and in desired format. One of these factors is harmonic caused by non-linear elements determining the quality of the power as a parameter. Some harmful effects of harmonics can be listed as; disruption of control devices, explode of capacitors, overload of transformations and additional losses in rotating machines, motors, and the occurrence of extra noise to motors and other elements, to cause telephone interference, parallel and serial resonance frequency. The most important and useful method of eliminating or reducing of harmonics is using harmonic filters. In this study, two different factory in the city of Van located at the east of the Turkey are examined in detail with a variety of different dates by Zera MT310's power analyzer measurements (instantaneous electrical values, harmonics, current and voltage waveforms, etc.). With these measurements, some power lacks of quality are determined and examined. After this process, single-tuned passive filter is designed by using Matlab/Simulink software for these factories.

Helikoptere benzeyen ikinci dereceden ikiz pervaneli çoklu girişli ve çoklu çıkışlı (MIMO) doğrusal olmayan bir sistemin (TRMS) kontrol tasarımı çok karmaşık bir iştir. TRMS sistemi, bir kiriş ile birbirlerine bağlantılı olan ana ve kuyruk pervanesinde oluşmaktadır. TRMS sisteminin dengesinin sağlanması için her iki pervane açıları, pervanelerin bağlı bulunduğu DC motorların hızları değiştirilerek yapılır. TRMS sisteminin dengede çalışması sağlamak amacıyla oransal-integral-türev (PID), kesir dereceli PID (FOPID), kayan kip (SMC), Süper bükümlü kayan kip (STSMC) ve Kesirli dereceli süper bükümlü kayan kip (FOSTSMC) kontrol yöntemleri kullanılmıştır. Kontrol parametrelerinin belirlenmesi için MATLAB/Simulink programında benzetim çalışmaları yapılmıştır. Benzetim çalışmalarında bulunan en başarılı yöntemler kullanılarak, deneysel çalışmalar yapılmıştır. Benzetim ve deneysel çalışmalarının her ikisinde de ana pervane FOPID ve kuyruk pervanesi FOSTSMC yöntemi ile kontrolü diğer kontrol yöntemlerine göre en iyi sonucu verdiği görülmüştür.

The chaotic masking process on sound signals using the systems of Lorenz, Rössler, Sprott, Chen, and Arneodo chaotic oscillations are simulated with MATLAB/Simulink. The PID control method providing synchronization in the system is defined and the mean square errors between the times to reach synchronization and the input-output sound signals are compared for the system performance. The Sprott chaotic system is found to be the best synchronized system. Therefore, the application circuits are designed with respect to the Sprott chaotic system and its results are investigated in this study. It is seen that the system marked with the Sprott chaotic oscillator has a shorter time with respect to the time reaching synchronization, while the Lorenz chaotic oscillator gives a smaller mean square error.

No abstract