CLOSED LOOP PROCESS CONTROL

BYKaviyarasan.s

CLOSED LOOP SYSTEM Closed loop system is the feedback

controlled system, which could make decision according to the feedback(ie sensors).

EXAMPLEDestination: For the purpose of speed

control of a servo motor in machine vision system, we are in need of interfacing the closed loop machine vision system with 8085(as controller).

CONSTRUCTION Input (voltage) Feedback device (Speed sensor)

EPROM (memory) 8085 (processor) 8255 (peripheral interface) Resistance (speed control)

Output device (servo motor)

PROCESSING The 8085 is an 8 bit microprocessor that

is used as speed controller in above given operation, the speed sensor is to detect speed of motor (1500RPM).If it reaches above the synchronous speed, the sensor give feedback signal to microprocessor. The resistance will be activated by the processor and so the due to voltage control the speed of motor could be maintained.

SPEED CONTROL OF MOTOR

FLOW CHART