Elektromanyetik retarderlerin bulanık mantık algoritmaları ile kontrolü


Thesis Type: Postgraduate

Institution Of The Thesis: Kocaeli University, Fen Bilimleri Enstitüsü, Otomotiv Mühendisliği Bölümü, Turkey

Approval Date: 2019

Thesis Language: Turkish

Student: AYŞEGÜL GÖLEN ALTUNTAŞ

Supervisor: Rıza Emre Ergün

Abstract:

Electromagnetic retarders are braking devices used in high-speed trains, amusement systems in amusement parks and especially in heavy-duty vehicles. Today, in heavyduty vehicles using an electromagnetic retarder, the braking torque is gradually determined by means of a hand lever. The retarder generates a magnetic field by means of the electric current applied to the coils, creating braking torque. The resulting braking torque is proportional to the current intensity applied to the coils. The mathematical model of the electromagnetic retarder is difficult to draw. The main reason for this is that the high currents passing through the coils cause a significant heat increase in the system. The increase in heat leads to changes in the mathematical model by changing the resistance of the retarder coils. For this reason, fuzzy logic algorithms, which do not require a mathematical model for the application of retarder control, are used in this study. Thanks to the fuzzy logic algorithms, real-time control of the system is provided through the interface software developed using LabVIEW program. Determination of optimum control parameters, visual and graphical feedback, as well as braking and speed stabilization application was developed through this interface software. Some of the control software of the system was carried out by means of the STM32F407VG microcontroller used and the other part was carried out via computer software. In this application thanks to PWM signal which enables the use of electromagnetic retarder as a speed stabilizer, high resolution braking has been made. According to the results obtained from the measurements, control was performed with ±50, ±30, ±25 steady state errors for 2500, 2250, 2750 and speed setpoints respectively.