11.7. Friction and Actuator Dynamics

Try these first

1. 1.

   What is static friction?

   Hint

   Think about why a heavy box cannot be moved easily.

2. 2.

   What does the torque-speed curve represent?

   Hint

   Consider how the performance of an actuator changes with speed.

3. 3.

   What type of friction opposes motion while an object is at rest?

   • Static Friction
   • Viscous Friction
   • Static and Viscous Friction

   Hint

   Consider the force required to start moving a parked car.

4. 4.

   True or False: The Stribeck effect indicates that friction increases at low velocities.

   • True
   • False

   Hint

   Think about how lubrication affects motion.

5. 5.

   A robotic gripper experiences high static friction and is unable to lift a payload. Suggest adjustments to improve its performance.

   Hint

   Think about how friction affects the surfaces that interact.

6. 6.

   In a scenario where a robot's actuator delays its response significantly, discuss potential redesigns to mitigate control issues.

   Hint

   Analyze how controller design can optimize performance despite delays.