Abstract:
Overshoot is a serious problem in industrial
process control. This paper presents a new method for
elimination of step response overshoot in a conventionally
PID-controlled system by cascading a sliding mode
conntroller in the outer loop. The general idea is to use the
cascade control principle to model the under-damped
system with PID control with a second-order system and
then to make use of the sliding mode control feature to
obtain a robust, reduced-order response, and thus,
suppressing the control overshoot. The validity of the
proposed approach is verified through simulation for an
uninhabited ground vehicle's braking system suffering
from highly nonlinear uncertainties.
