Motor startup and braking simulation in Simulink - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the motor speed to start from zero.

Simulink

motor_speed = [1]

Drag options to blanks, or click blank then click option'

A1

B100

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the initial speed to a non-zero value.

Using a negative speed at startup.

The motor speed should start at zero to simulate startup from rest.

2fill in blank

medium

Complete the code to apply braking torque to the motor.

Simulink

braking_torque = [1]

Drag options to blanks, or click blank then click option'

A100

B-10

C10

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using positive torque for braking.

Setting braking torque to zero.

Braking torque is applied as a negative value to slow down the motor.

3fill in blank

hard

Fix the error in the code to correctly calculate motor acceleration.

Simulink

acceleration = (torque [1] load_torque) / inertia

Drag options to blanks, or click blank then click option'

A-

B*

C+

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Adding torques instead of subtracting.

Multiplying torques incorrectly.

Acceleration is proportional to the net torque, which is motor torque minus load torque.

4fill in blank

hard

Fill both blanks to create a dictionary of motor states with speed and torque.

Simulink

motor_states = {'speed': [1], 'torque': [2]

Drag options to blanks, or click blank then click option'

Amotor_speed

Bbraking_torque

Cacceleration

Dload_torque

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing acceleration with speed.

Using load torque instead of braking torque.

The dictionary should map 'speed' to motor_speed and 'torque' to braking_torque to represent current motor states.

5fill in blank

hard

Fill all three blanks to compute the motor speed after braking over a time step.

Simulink

motor_speed = motor_speed [1] acceleration [2] time_step [3] braking_effect

Drag options to blanks, or click blank then click option'

A+

B*

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using division instead of multiplication for time step.

Adding braking effect instead of subtracting.

Motor speed updates by adding acceleration times time step, then subtracting braking effect.