PC-Based DC Motor Position Control System Using IEEE-488 Interface

Abstract

A Closed-loop DC motor position control system using personal computer (PC) is designed and set up in the laboratory. The connection of PC to the Motor Position Control circuit uses IEEE-488 standard interface. The Programmable Logic Array (PLA) is used to design the IEEE-488 interface circuit for the Motor Position Control circuit. Motor position control circuit loop uses both velocity feedback and position feedback to achieve high stability and high accuracy. A combination of current and voltage feedback is used to provide velocity feedback. A potentiometer with its shaft coupled to the motor is used to provide position feedback. The complete set-up is established in the laboratory, and the result is an automatic angular position control system which uses PC in DC motor closed-loop position control with IEEE-488 standard interface.