Observer-based non-fragile event-triggered control of extra-corporeal blood circulation process in finite-time interval

Abstract

An observer-based event-triggered non-fragile control problem for regulating the levels of oxygen and carbon dioxide (O2$$ {}_2 $$ and CO2$$ {}_2 $$) in patients blood during the extra-corporeal blood circulation (ECC) process with random communication packet losses is explored in this work. The main intention of this work is to design an observer-based event-triggered and non-fragile controller for ensuring the finite-time boundedness criterion for the resulting system with mixed H infinity$$ {H}_{\infty } $$ and passivity performance index over a finite interval of time. In addition to the limited bandwidth of the channels, such random packet losses might occur simultaneously between the sensors and the controllers, and between the controllers and the actuators. Unlike most studies in the literature, we have found that, since the controller-actuator link has packet dropouts, the observer's control input differs from that of the plant. The sufficient conditions derived are presented in a linear matrix inequalities frame work. Finally, simulation results are used to validate the efficacy of the proposed control method. The results show that the proposed observer-based event-triggered non-fragile controller keeps the blood gases within physiological limits during a stable ECC process.