Bounded control of a ball and beam system in the absence of feedback

In this paper, we consider a control problem of a ball and beam system in a situation where feedback is disconnected. Due to feedback disconnection, any feedback controller is not available and as a result, the position of the steel ball cannot be hold for long. The main difficulty is the open-loop environment at the happening of feedback disconnection. We show that bang-bang control input can be a good candidate which holds the ball position with certain bounds for the longest time.