AWS DevOps Motion Control & Kinematics 5

Question 1

In motion control, what does 'electronic gearing' allow?

Accepted Answer

Synchronizing multiple axes electronically to maintain a defined position ratio

Answer

Electronic gearing locks a follower axis to a master axis at a programmable ratio without a mechanical connection.

Question 2

A trapezoidal velocity profile consists of which three phases?

Accepted Answer

Ramp-up, constant velocity, ramp-down

Answer

The trapezoidal profile accelerates at a constant rate, cruises at peak speed, then decelerates symmetrically.

Question 3

What does 'backlash' refer to in a mechanical transmission?

Accepted Answer

The angular gap (lost motion) between mating gear teeth when direction reverses

Answer

Backlash is the dead-band in position that occurs when drive direction reverses due to clearance between gear teeth.

Question 4

In multi-axis coordinated motion, what is 'contouring error'?

Accepted Answer

The difference between programmed and actual path of the end-effector

Answer

Contouring error measures how far the actual Cartesian path deviates from the commanded path during multi-axis motion.

Question 5

Which mathematical representation is commonly used to express combined rotation and translation of a rigid body in 3D space?

Accepted Answer

4×4 homogeneous transformation matrix

Answer

A 4×4 homogeneous matrix encodes a 3×3 rotation submatrix and a 3×1 translation vector in a single compact form.

AWS Practice Test