Effective and Reliable Speed Control of Permanent Magnet DC (PMDC) Motor under Variable Loads

Abstract

-This paper presents the effective and reliable speed control of PMDC motors under variable loads and reference speeds. As is known DC motors are more preferred in industrial practices. This is that, the PMDC motors don't require brush and commutator care and to increase in torque per motor depending on developments in power electronics. In this study, proportional-integral controller (PI) and fuzzy logic controller (FL) have been designed for speed control of PMDC motor. In the design of these controllers, characteristics such as minimum overrun time, response time to the load, settling time and ideal rise time have been taken into consideration for better stability performance. In this design, the best system response was searched by examining the effect of different defuzzification methods onto the fuzzy logic system response. In conclusion, it has been seen that FL controller has a better performance for variable speed-load control of PMDC motor compared to PI controller.

Kararsız Koşullarda SMDA Motorun Dayanıklı Hız Kontrolü İçin Bulanık-Tabanlı Akıllı Denetleyici Tasarımı

“… Birim değerde ölçülen motor hız eğrisinin maksimum aşma değeri (Maximum overshot (Mp<10%)),  Referans hız ile motor çıkış hızı arasında hata (No steady-state-error (ess<1%)),  Motor hız eğrisinin sabit durum değerinin mutlak yüzdesiyle belirtilen son büyüklük değeri civarında olması ve bu aralıkta kalması için gereken süre (Setting time (ts<2s)),  Motor hızının ilk defa sabit değerinin yarısına ulaşması için gereken süre (Delay time (td)),  Motor hızının sabit durum değerinin %10'dan %90'a yükselmesi için gereken süre (rising time (tr<1s)), olarak tanımlanan performans kriterlerine uygun olarak doğrusal olmayan çalışma ve yük koşulları altında istenen referans hıza en iyi cevabı vermesidir [14]. İkinci dereceden doğrusal zamanla değişmeyen bir sistemin Mp, ess, ts, td ve tr değerlerini gösteren tipik bir adım cevabı Şekil 1'de gösterilmiştir.…”

Finite Control Set Model Predictive Speed Control of a DC Motor

“…In servo applications, this value is generated from a trajectory generator or a ramp generator [18]. Based on (2) and (23), we can write an equation for a dynamic feedforward component of current as follows:…”

“…The PMDC machines have been extensively studied and many advanced control strategies have been presented in the past, but they are studied by many researchers even today [1][2][3][4][5][6][7]. Among the new approaches, a new and attractive alternative for the control of H-bridge supplied PMDC machine is finite control set model predictive control (FCS-MPC) [8].…”

The Performance Analysis of Artificial Neural Network Based Shimizu-Morioka Chaotic System with Respect to Sample Numbers

“…Nowadays, Fuzzy-Logic, Genetic Algorithms and ANN are among the AI technics that have been used in various areas [10,15]. ANN can be used not only in system identification but also in modeling of system.…”