In this paper, a generalized predictive observer-controller (GPOC) is devel
oped for injection moulding with input delay and non-measurable states. Fir
st, based on a general state-space model with time delay and subject to pro
cess disturbances, a generalized predictive control (GPC) is appropriately
formulated with a steady-state Kalman filter. Second, important and useful
closed-loop characteristics relating to the stability and robustness of the
proposed controller are provided. Finally, the proposed scheme is applied
to the injection moulding to improve the control performance.