We describe a qualitative study investigating the acceptability of Google Glass eyewear computer to people with Parkinson's disease (PD). held workshop 5 PD patients and 2 carers exploring perceptions Glass. This was followed by 5-day field trials 4 patients, where participants wore device during everyday activities at home in public. report generally positive responses as instil confidence safety for this potentially vulnerable group. also raise concerns related potential reaffirm...

This paper investigates the problem of asymptotic stabilization underactuated surface vehicles (USVs) with actuator dead-zones and yaw constraints. By transforming system model into two subsystems, a backstepping control method based on Barrier Lyapunov Function (BLF) is introduced to stabilize transformed prevent USV from reaching boundaries angle velocity A fixed-time disturbance observer involved in controller deal disturbances. The extended cover case which constraints are time-varying...

To address collision challenges between multi-UAVs (unmanned aerial vehicles) during obstacle avoidance, a novel formation control method is proposed. Leveraging the concept of APF (artificial potential field), proposed approach integrates UAV maneuver constraints with consensus algorithm, optimizing velocities through particle swarm optimization (PSO) algorithm. The optimal algorithm then employed to achieve convergence rate formation. mitigate limitations traditional APF, collinear force...

Purpose This paper aims to examine three of the major issues relating welfare seafarers, including wages, social security benefits and onboard ashore facilities services. It is impossible research all countries here, so this selects Greece – which one today’s primary shipping as for shipowning, well global supply demand seafarers conduct an empirical case study. Design/methodology/approach Based on existing knowledge scholarship, data collected in several phases fieldwork, intends critically...

Abstract For the large equipment, system model is usually difficult to obtain, or changes slowly with running time. Therefore, some methods based on accurate are apply, such as wind turbine. data‐based robust value iteration method data studied for variable pitch control of turbine first time, which can deal uncertainty and do not require an model. First, a new data‐driven Bellman equation derived base operation data. Next, VI structure designed, free algorithm. Then, controller proposed,...

Abstract This paper concentrates on the leader‐following distributed control problem for linear multi‐input systems while guaranteeing prescribed finite‐time performance. Compared with current state of arts, novel nonsingular coordinate transformations are proposed by using block decomposition technique and smooth time‐varying scaling functions, such that a prescribed‐time framework dealing distinct subsystem dimensions featured is acquired. The boundedness closed‐loop system input proven...

This study explores an obstacle avoidance control approach that takes into account both actuator dead zones and unpredictable disturbances in environments with moving obstacles. Initially, we enhance a Barrier Lyapunov Function (BLF) by introducing the concept of equivalent safe distance. innovation broadens safety perimeter around obstacles considering their velocity movement duration, thereby simplifying intricacies associated models strategies. Furthermore, refine auxiliary function...

This paper investigates the trajectory tracking problem of autonomous ground vehicles (AGVs). The dynamics considered feature external disturbances, model uncertainties, and actuator dead zones. First, a novel time-varying yaw guidance law is proposed based on line sight method. By state transformation, AGV proved to realize control under premise eliminating deviation. Second, fixed time zone compensation method introduced ensure angle presented guidance. Furthermore, an improved fixed-time...

This paper studies the prescribed finite time stabilization control problem of multi-input linear systems subject to uncertainties and state constraints. Different from finite-time fixed-time methods, a novel switching nonsingular coordinate transformation function based on block decomposition technique is developed, resulting in solution that action continuous bounded transformed system. Moreover, boundedness closed-loop system states ensured with performance. Furthermore, we incorporate...

This study investigates the integral line of sight (ILOS) path-following control problem surface vehicles whose dynamics feature external disturbances, model uncertainties, and actuator dead zones. First, introducing ILOS guidance law, is converted to stabilising a 2nd order nonlinear system. Subsequently, fixed-time observer designed estimate compensate for uncertainties unknown disturbances while overcoming Finally, trajectory tracking strategy based on observer. Numerical examples are...

This paper investigates the formation control problem of multiple underactuated surface vehicles (USVs). By utilizing input and state transformations, dynamic model USV is converted into an equivalent system consisting two cascade-connected subsystems. For one subsystems, by combining back-stepping method with time-varying scale functions, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$C_{1}$...

This study investigates the problem of asymptotic stabilization underactuated surface vehicles (USVs) in presence simultaneous matched and mismatched disturbances. Within framework back-stepping control by introducing a periodic term laws virtual yaw angle surge velocity, design method is developed to stabilize USVs into bounded region. By induction method, novel fixed-time disturbance observer based on higher-order sliding mode differentiators are introduced. Then law proposed observers...

In this paper, the finite-time bipartite consensus (FTBC) problem is investigated for multi-agent system (MAS) with detail balanced structure. To realize FTBC of MAS, a unified protocol framework developed. Some criteria are established realizing FTBC. It worth noticing that estimations settling time can be given in form mathematical expression. The bring various protocols by choosing different parameters, which extends previous results. Finally, two numerical examples provided to illustrate...

Under the background of energy revolution, new power system is gradually transforming into Internet. With large-scale penetration wind and diversification service modes regional integrated systems, uncertainty source load has become a difficult problem in planning operation systems. Aiming at above problems, this paper proposes highly general distribution-integrated distribution robust scheduling method. First, IES divided electric-gas transmission network multi-energy flow hub network. The...

This study explores positioning and obstacle avoidance control for autonomous surface vehicles (ASVs) by considering equivalent elliptical-shaped obstacles. Firstly, compared to most Barrier Lyapunov function (BLF) methods that approximate obstacles as circles, a novel BLF is improved introducing an elliptical model. improvement uses ellipses instead of traditional circles obstacles, effectively resolving the issue excessive conservatism caused over-expanded areas during equivalence process....