Design of a discrete-time sliding mode controller for a magnetic levitation system using multirate output feedback

Sliding Mode Control System for Improvement in Transient and Steady-state Response

“…In this study, a controlled plant is assumed to be a single-rate control system, where both the plant output and the control input are sampled or updated at the same rate. However, if a control system is extended into a multirate system, where the sampling interval of the control input differs from the hold interval of the control input, the control performance can be enhanced (Bandal & Vernekar, 2010;Bandyopadhyay & Janardhanan, 2006;Inoue et al, 2007). The main objective of this monograph is to present a broad range of well worked out, recent application studies as well as theoretical contributions in the field of sliding mode control system analysis and design.…”

“…Variable structure control (VSC) can be easily applied to nonlinear systems and is robust to plant parameter variation or load disturbance because of the existence of a sliding mode. Hence, it has been applied to various systems (e.g., an inverted pendulum system, a magnetic levitation system and robot manipulators (Ashrefiuon & Whitman, 2010;Bandal & Vernekar, 2010;Zergeroglu & Tatlicioglu, 2010)). VSC methods employing integral compensation have been proposed to achieve servo tracking in the presence of load disturbance or plant parameter variation (Chern & Wu, 1991;1992a;.…”

A Review Note on Different Components of Simple Electromagnetic Levitation Systems

“…J,-H Li has designed a proportional plus derivative controller (PD)-type fuzzy controller in discrete time domain and successfully tested also [45]. The discrete sliding mode control with multirate output feedback scheme has been used in maglev system by Bandal and Vernekar [46] and Oza et al [47]. They showed that the multirate output feedback-based discrete-time sliding mode controller is more robust than the former discrete-time sliding mode controller.…”

Ventajas docentes de un flotador magnético para la experimentación de técnicas control

“…Un posible montaje de levitación magnética se muestra en la Figura 1 y ha sido estudiado, por ejemplo en [5,6] desde una perspectiva centrada en el control. Consta de una bobina, que genera una fuerza en un imán, que a su vez es detectado por un elemento Hall.…”