The goal of this project is to develop simulation program that operates a dc motor using pulse width modulation (pwm) to achieve a desired angular velocity, and utilizing a pid controller to maintain the desired velocity regardless of an abrupt change in loading (torque).

your design must meet the following requirements:
 use the data-sheet for portescap 08g61-205c dc motor. it is posted at titanium.
 the applied voltage should not exceed 9 volts.
 the initial external load carried by the motor is 0.5 mn. m, in addition to its internal friction torque
 set up the system so that it achieves 1000 rpm.
 set up the system so that at the 20-second point its external load suddenly changes to 1.0 mn. m.
 apply a control strategy to maintain the speed at 1000 rpm throughout the time, even after the abrupt
change in the load (torque) has occurred.
 computer simulations using simulink/simscape are required to confirm the above requirement