This paper addresses the distributed tracking control of multiple uncertain high-order nonlinear systems with prescribed performance requirements. By introducing a function and transformation, fixed-time problem is reformulated as for special systems. With aid universal approximation theorem continuous functions algebraic graph theory, robust adaptive controllers are designed using backstepping technique. Simulation results presented to demonstrate effectiveness proposed algorithms.

Vertical-axis hydrokinetic turbines are promising option to harness the low velocity currents. However, limited investigations have been carried out considering interactions between turbine rotor and channel section, including free-surface. Thus, a vertical-axis model has designed manufactured, be tested in an open channel. Also, three-dimensional multiphase simulation out, using volume of fluid (VOF) model, capture air–water interface investigate free-surface variations effects on output....

Abstract Background The need for a better understanding of pulmonary diseases has led to increased interest in the development realistic computational models human lung. Methods To minimize cost, reduced geometry model is used lung airway up generation 16. Truncated branches require physiologically boundary conditions accurately represent effect removed sections. A user‐defined function been developed, which applies velocities mapped from similar locations fully resolved methodology can be...

A laser-stripe system for the automation of welding processes in heavy industries is presented. Conventional methods use human intervention. new solution using only common usage computer components has been developed, offering at least same quality performance a low price, making laser systems without intervention attractive cost sensitive applications industries. that guarantees satisfactory tracking results even when gap geometry varies strongly or distorted by noise developed.

Multirotor configurations introduce complicated aerodynamic and aeroacoustic interactions that must be considered during aircraft design. In this paper we explore two numerical methods to model the acoustic noise caused by rotor-on-rotor of rotors in hover. The first method uses a conventional mesh-based unsteady Reynolds-average Navier-Stokes (URANS) solver, while second consists meshless Lagrangian solver based on viscous vortex particle (VPM). Both are coupled with an aeroacoustics for...

Abstract Air pollution has become a major concern in industrial or highly populated areas. Although legislation been enacted to limit levels, air quality monitoring still needs be carried out by stations which are located at fixed points unable provide the spatial evolution of pollutants. This research, focused on city Gijón (Asturias), includes Computational Fluid Dynamics model capable simulating dispersion pollutants large urban environment (12x18 km $$^{\textrm{2}}$$ <mml:math...

Distributed generation systems composed of non-renewable and renewable power sources is one the best approaches for reducing greenhouse gas emissions. Nevertheless, uncontrolled integration in distribution system may have negative effects on efficiency working parameters. Global optimization distributed not available, but microgrids arrangements make it possible to design management which are able control their parameters give fast responses internal events without affecting system. This...

Air pollution, representing one of the major environmental crises affecting us all, is responsible for half a million deaths each year in Europe. This research shows numerical model based on Computational Fluid Dynamics (CFD) and methodology its validation allowing to know evolution particles open urban environments. In this case, represents an area Gijón (Asturias), specifically chosen as it serves highlight location at which daily limit values PM10 set by regulations are most frequently...

A three-dimensional, computational fluid dynamics model of the human respiratory system is put forward for consideration. This in silico based on existing state-of-the-art geometric approximations. As a complete simulation geometry would have unaffordable high costs, composed single path air from mouth to 16th bronchial generation, truncating symmetrical branches that were not included. The innovation housed this development function applied truncated branches, which contemplates behavior...

The progressive aging population and the prevalence of chronic diseases are some major challenges current society. This paper aims to illustrate an innovative approach pervasive health monitoring based on state art technology. proposed solution is two main agents: a non-contact system embedded in mirror-like device non-invasive automatic activity watch-like device. Heart Rate (HR), Respiratory (RR), Variability (HRV) extracted from user;s face by Physical Activity (PA) wearable this works...

This paper presents the active power dispatching of microsources, as an on-line minimization problem, including electrical and heat generation costs. The use a new algorithm: cost-function based control algorithm for microgrids (OCCAM), makes it possible to obtain similar or even better solutions than those obtained using other state art methods like MADS SQP. Moreover, its execution time is about one hundred times lower needed by algorithms can run efficiently on-line. OCCAM on same...