Abstract
In the design method of the deadbeat digital controller, the Z domain approach using the pulse transfer function of the process or the time domain approach using state vector equation is generally used.
In this paper, we propose a time domain design for an optimal deadbeat controller which can minimize the quadratic performance index for the manipulated variable and deviation or controlled variable.
The sequence of the optimal control signal which makes the deadbeat response for step, ramp, or constant acceleration variation of the desired value and step-wise disturbance can be easily obtained from the computation of the matrix constructed by the impulse response sequence of the system.
Then, an optimal deadbeat controller is designed by using sequence of the control signal.
The method proposed here is very simple comparing with other methods and can be systematically applied to the system including the lag time or the restriction of the manipulated variable.
