What is the difference between inverse kinematics approach and forward kinematics approach?

Forward kinematics and inverse kinematics are two different approaches used in the field of robotics and biomechanics to analyze and control the motion of robotic systems or mechanical structures. Forward Kinematics: Definition: Forward kinematics is the process of determining the position and orientation of the end-effector (or any point of interest) of a robot or a mechanism based on the known values of joint variables. Process: Given the joint angles or joint displacements, forward kinematics calculates the position and orientation of the end-effector in the robot's workspace. Equation: Mathematically, forward kinematics can be represented by a transformation matrix that describes the relationship between joint variables and the end-effector position and orientation. Use: It is commonly used for motion planning, animation, and visualization in robotics. Inverse Kinematics: Definition: Inverse kinematics is the opposite process; it involves determining the joint angles or joint displacements required to position the end-effector at a desired location and orientation. Process: Given a desired position and orientation of the end-effector, inverse kinematics calculates the required joint angles or joint displacements to achieve that pose. Equation: Inverse kinematics problems often involve solving complex mathematical equations or systems of equations. Closed-form solutions may not always exist, and numerical methods may be required. Use: Inverse kinematics is crucial for tasks such as robot control, motion planning, and trajectory generation. In summary, forward kinematics is concerned with going from joint variables to end-effector position and orientation, while inverse kinematics is concerned with determining the joint variables required to achieve a desired end-effector pose. Both concepts are essential in the analysis and control of robotic systems, with forward kinematics helping to visualize and plan robot motions, and inverse kinematics enabling precise control and path planning. read less