Why do we refer to a stepper motor as a type of digital actuator, while servo motors are referred to as a type of analog actuator?Question 9Select one:a.A stepper motor is controlled by a PWM signal, which is a type of digital signal, while servos are controlled by an analog voltage.b.A stepper motor cannot rotate to any angle, but only to certain angles that are multiples of the steps.c.Stepper motors rely on feedback from a digital sensor that is attached to the shaft.

The distinction between stepper motors as digital actuators and servo motors as analog actuators is primarily due to the way they are controlled and their operational characteristics.

a. A stepper motor is often referred to as a digital actuator because it is controlled by digital pulses. Each pulse makes the motor move to the next step, hence the name 'stepper motor'. The number of pulses determines the number of steps the motor takes, and thus the position of the motor. This is a form of digital control because the motor moves in discrete steps, not continuously.

b. On the other hand, a servo motor is often referred to as an analog actuator because it is controlled by an analog signal, usually a variable voltage or current. The position of the servo motor is determined by the magnitude of the analog signal. This allows for more precise control of the motor's position, as it can be moved to any angle within its range, not just to certain angles that are multiples of the steps.

c. The statement about stepper motors relying on feedback from a digital sensor attached to the shaft is not entirely accurate. While some stepper motors may use feedback for more precise control, many operate open-loop, without any feedback. In contrast, servo motors typically do use feedback to adjust their position based on the difference between the desired and actual position. This feedback is often provided by an analog sensor, such as a potentiometer.