Observer-based Production control of Manufacturing Machines

The paper deals with the problem of controlling manufacturing machine such that an unknown customer demand is tracked with a desired accuracy. To study this problem, a manufacturing machine is approximated by an integrator which is subject to input saturation as a result of the finite capacity of the machine. To solve the problem in case of unknown demand rate, a combination of feedforward-feedback controller with a reduced-order observer is proposed. A steady-state performance of the system with periodic demand fluctuations is studied.