To Control the Real Speed of DC Motor using PID controlled method & Micro-Controller
This project presents the real time DC motor speed controller design using Micro-Controller & PID control method. Moreover, the proposed real time controller approach is based on closed loop feedback principle unlike the existing open loop designs.
In the proposed approach the closed loop speed control with a digital PID controlled technique is design. Further the controlled value is obtained from Micro-Controller is utilize to generate the average output voltage for adjusting the percentage error in order to maintain constant motor speed.
What is PID Technique?
A proportional–integral–derivative controlled technique (PID technique) is a closed loop feedback mechanism (technique) widely used in industrial control systems. PID is the most commonly used feedback technique.
A PID technique calculates an “error” value as the difference between a measured process variable and a desired set point. The controller attempts to minimize the error by adjusting the process control inputs.
The PID controller calculation (algorithm) involves three separate parameters, and is accordingly sometimes called three-term control: the proportional, the integral and derivative values, denoted P, I, and D. These values can be interpreted in terms of time: P depends on the present error, I on the accumulation of past errors, and D is a prediction of future errors, based on current rate of change.
The output of the system is fed back through a sensor measurement to the reference value. The controller then takes the error (difference) between the reference and the output to change the inputs to the system under control. This kind of control system is a feedback control system.
Project Block Diagram