Dead-Beat Terminal Sliding Mode Control With Application to DC-DC Buck Converters

In this brief, a novel definition describing a switching steady-state motion, such that the tracking error always remains within a steady-state error domain, is introduced. Both the dead-beat reaching law and discrete terminal sliding mode function are proposed and applied to the design of the dead-beat terminal sliding mode controller which drives the tracking error to a steady-state error domain. In order to characterize the attractiveness and invariance properties of the controlled system, the upper/lower bounds of the steady-state error domain and the bound on absolute attractive layer of the tracking error are systematically derived. Finally, both numerical simulation and experimental results on the dc-dc buck converters in three different cases, i.e., the load resistance variation, the input voltage variation, and the desired output voltage variation, confirm the usefulness of the proposed method.