10.1.4.1. Joint angles (θ) for revolute joints

Try these first

1. 1.

   What does the joint angle (θ) represent in a revolute joint?

   Hint

   Think about how joints move.

2. 2.

   How do revolute joints differ from prismatic joints?

   Hint

   Consider movement types.

3. 3.

   What do joint angles define in revolute joints?

   • The position of the robot
   • The amount of rotation
   • The length of the arm

   Hint

   Remember the function of revolute joints.

4. 4.

   True or False: Joint angles are only relevant in forward kinematics.

   • True
   • False

   Hint

   Consider both processes of kinematics.

5. 5.

   A robotic arm has a 90-degree revolute joint. If the joint rotates three times from the starting position, what will be the final rotation angle? Explain your reasoning.

   Hint

   Calculate total degrees considering the repetitions.

6. 6.

   Given a scenario where a robotic arm needs to reach a point at coordinates (5, 5) using two revolute joints, express how you would find the necessary angles using inverse kinematics.

   Hint

   Think about the geometrical relationships between the joints and the end position.