Modern cars are equipped with continuously variable transmission (CVT) to make the vehicle smooth operation and to reduce the transmission losses. Many researchers and car companies have developed several types of CVT to improve the transmission losses with maintaining the acceleration time. However, most of the studies reported that the developed CVT has some constrains in the actuation mechanism which leads this study to develop an innovative electromagnetic actuated continuously variable transmission (EMA-CVT) system. The mathematical models have been developed for the kinematics analysis of clamping and electromagnetic forces of EMA. The EMA of this study has been developed for 1/2 scale car with two sets of solenoid. Each set of the solenoids has been equipped with primary and secondary pulleys for pushing and pulling the movable sheave. The operation of the solenoid is performed by controlling the supply current with a potentiometer. A simulation based Fuzzy Logic controller has also been introduced in this study to predict the EMA system dynamic behaviour for identifying the current control of the EMA actuation. The fuzzy simulation block embedded with a mathematical model assists to predict system responses. The EMA experiment has been conducted by controlling the currents that were identified from the fuzzy simulation. The EMA developed electromagnetic forces 108 N for current 1.21 amp and 301 N for current 3.37 amp which are good enough to overcome the clamping force for the 1/2 scale car the maximum 278 N. It is observed that travelling time of the plunger is in the range of 1.8-3.1 s which could be considered as the acceleration time for the car. The correlations between the measured and predicted values of traction torque have been found 90.99 %. It indicates that the predicted data over the measured data have a closed agreement and thus, substantially verified the fuzzy simulation model.
Fuzzy Logic Controlled Electromagnetic Actuated Cvt System for Passenger Car
2012
11 Seiten
Aufsatz (Konferenz)
Englisch
Beschleunigung , gleichmäßig variables Getriebe , Solenoid , Fuzzy-Regler , kinematische Analyse , Stromregelung (elektrisch) , Personenkraftwagen , dynamisches Verhalten , Fuzzy-Logik , elektromagnetische Kraft , Systemantwort , Proportionalität , Potentiometer , Kraftschluss , Messdaten , Spannkraft
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