deadbeat controller
A deadbeat controller is a digital controller that places all the closed loop poles in the origin. (From the analog point of view, it is placing closed loop poles at s=-inf, since z=e^Ts, ie system reaches setpoint VERY fast.) For n-zero poles, it guarantees that the system reaches the setpoint in n steps. The cost is that overshoot is usually very high, and the control signal required may be expensive to generate. As such, it is only used in extreme situations, such as weapons systems.