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Murugesan Sathishkumar,Yen-Chen Liu 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.6
This work addresses the memory event-triggered consensus control design problems of multi-agent systems (MASs) under actuator failures and aperiodic denial-of-service (DoS) attacks. In order to overcome an unpredictable traffic in the network communication channel, an appropriate memory event-triggered scheme (METS) is proposed. The purpose of this scheme is to utilize certain release packets to create new event compared with the existing event-triggered scheme (ETS). In this fashion, the event generator can achieve accurate decision as well as better performance of the control can be expected. Further, a new switched approach is established to describe the consensus performance of system model with aperiodic DoS attacks. By incorporating the Lyapunov-Krasovskii functional (LKF), adequate constraints of the consensus for MASs are derived. Based on the obtained conditions, the consensus control gain matrices are presented by utilizing the technique of linear matrix inequalities (LMIs). Eventually, simulation results are given to validate the applicability of the proposed theoretical results which is based on the F-18 aircraft model systems.
Non-fragile reliable control synthesis of the sugarcane borer
Sakthivel, Rathinasamy,Saravanakumar, Thangavel,Sathishkumar, Murugesan IET 2017 IET systems biology Vol.11 No.5
<P>This study considers the problem of non-fragile reliable control synthesis for mathematical model of interaction between the sugarcane borer (Diatraea saccharalis) and its egg parasitoid Trichogramma galloi. In particular, the control could be substituted by periodic releases of a small population of natural enemies and hence it is important to propose the time-varying controller in sugarcane borer. The main aim of this study is to design a state feedback non-fragile (time-varying) reliable controller such that the states of the sugarcane borer system reach the equilibrium point within the desired period. A novel approach is proposed to deal with the uncertain matrices which appear in non-fragile reliable control. Finally, simulations based on sugarcane borer systems are conducted to illustrate the advantages and effectiveness of the proposed design technique. The result reveals that the proposed non-fragile control provides good performance in spite of periodic releases of a small population of natural enemies occurs.</P>
N. Pugazhenthiran,S. Murugesan,H. Valdés,M. Selvaraj,P. Sathishkumar,P.G. Smirniotis,S. Anandan,R.V. Mangalaraja 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
In this study, 250 nm sized porous anatase TiO2 nanospheres (TiO2 NSPs) composed of 10 nm sized anataseTiO2 nanoparticles are obtained through a green synthetic route and their surfaces have been decoratedwith 3–4 nm sized plasmonic silver nanoparticles (AgNPs). Photoluminescence studies confirm thatthe AgNPs presence on TiO2 NSPs surface effectively inhibits the radiative charge recombination and thusfacilitates charge separation process at the Ag-TiO2 NSPs interface, causing an enhanced photocatalyticactivity. About 92% of the ceftiofur sodium (CFS) antibiotic taken initially is oxidized by Ag-TiO2 NSPsupon 90 min white light irradiation, while Ag loaded Degussa P25 TiO2 nanoparticles effects only 71%CFS oxidation. The synergistic effect given by plasmonic AgNPs and the continuous framework of anataseTiO2 NPs contributes to inhibit the electron-hole recombination in the Ag-TiO2 NSPs. Oxidation productsof CFS in different water sources and their eco-toxicity effects identified through LC-MS and microtoxbioassays,respectively, indicate that the obtained oxidation products are non-toxic compared to pureCFS. Therefore, porous Ag-TiO2 NSPs could be successfully applied in photocatalytic oxidation technologies,exploiting sunlight for the effective removal of pharmaceutical pollutants from wastewater.