Second-order sliding mode controllers: an experimental comparative study on a mechatronic actuator

Abstract

Numerous advanced control techniques for actuator control of an engine's air path have been developed in recent years. Among these approaches, the performance of sliding mode controllers stands out due to their robustness against changes in the physical conditions around the engine. This paper presents the design and testing of three high-order sliding mode controllers and a comparison of their performance in controlling a mechatronic engine air path valve. The most effective strategies are further tested for their robustness against variations in temperature and load conditions. The experimental results show the effectiveness and robustness of the controllers. Comparative results are presented that allow the performance of the considered algorithms to be compared both with respect to each other and with respect to sliding surfaces.

Sliding Mode Control of the Dfig Used in Wind Energy System

“…The characteristic feature of a continuous time SMC systems is that a sliding mode occurs on a prescribed manifold, or switching surface, where a switching control is employed to maintain the state on that surface [20][21][22][23]. Since the theory has been originally developed from a continuous time perspective, implementation of sliding mode for sampled data systems encounters several incompatibilities due to limited sampling rate, sample/hold effect, and discretization errors.…”