mechanics and control of accuracy robots

[GoRub]

There are some robots that the advantage of these robots is that they are very accuracy robot, more accuracy then the human, like robot that play billiard and every shut the robot put the ball in the target or robot that play baseball this robot have in his hand the baseball stick and every ball that the human player through to him the robot succeed to beat the ball with his baseball stick.
I search after others robots that have very good accuracy, I also search after information about these robots like what is the mechanics mechanism that they use and what control system they use.