Approximation- and Chattering-Free Quasi Sliding-Mode Control for Unknown Systems

Motivated by the concept of Quasi-Sliding Mode (QSM) in discrete-time systems, this brief presents a novel approach that relaxes the requirement of ubiquitous exact sliding motion in continuous-time systems, aiming to achieve an approximation- and chattering-free quasi-sliding mode controller (QSMC). The proposed QSMC provides robust and chattering-free control for an unknown nonlinear system without the need for intricate control methods, learning agents, or system identification tools. Furthermore, comprehensive simulation studies have been conducted to validate the effectiveness of the proposed strategy.