a. Design a 45% PB controller for motor-speed control. The motor speed varies from 100 to 150 rpm for an input control voltage of 0 to 5 V. A speed sensor linearly changes from 2.0 to 5.0 over the speed range. A setpoint of 125 rpm is desired, for which the motor control circuit input is 2.5 V.
b. Suppose the setpoint is changed to 120 rpm with no other adjustments. What offset error will occur?