11.5. Forward and Inverse Dynamics

Try these first

1. 1.

   What does forward dynamics calculate?

   Hint

   Think about the relationship between torque and movement.

2. 2.

   What is the primary use of inverse dynamics?

   Hint

   Consider why we need to know what forces are necessary to achieve certain movements.

3. 3.

   What does forward dynamics do?

   • Calculates joint torques
   • Calculates accelerations based on joint torques
   • Determines required joint positions

   Hint

   Remember what happens when you push something!

4. 4.

   True or False: Inverse dynamics is used only in simulation.

   • True
   • False

   Hint

   Consider its application in real-world robot control.

5. 5.

   A robotic arm must pick up an object weighing 2 kg. If you apply a torque of 10 Nm, what is the expected angular acceleration if the arm has an inertia of 0.5 kg*m²?

   Hint

   Pay attention to units and ensure you're using the correct formula for rotational dynamics.

6. 6.

   Explain the implications of having improper torque calculations in an inverse dynamics application where safety is critical (like a surgical robot).

   Hint

   Think about the consequences of mistakes in a delicate operation.