Experimental investigation on microcontroller based elevator positioning control system using fuzzy-logic

Abstract

This paper represents an implementation for microcontroller based elevator positioning-control method (PCM) on a microcontroller (MC) family of HCS-12 (MC9s12dp256b) employing fuzzy logic. This proposed approach is comprised of MC unit, DC-motor driver unit, display component and key segment. Mamdani based Fuzzy logic control (FLC) algorithm is incorporated with MC, which controls the direction and speed of DC-motor by injecting appropriate pulse width modulation (PWM) signal to its driver circuit of DC-motor. An upward or downward movement of the elevator can be achieved through the signal generated by the FLC unit, which is incorporated with MC unit. Moreover, the display modules are utilized for spotting the elevator-car in a specific floor and also for closing and opening the elevator door. The proposed control algorithm has been validated with a small prototype experimental setup developed in our laboratory and the performance of the prototype is verified through different traffic flow environments.