This note is concerned with robust H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">infin</sub> control of linear networked systems time-varying network-induced delay and data packet dropout. A new Lyapunov-Krasovskii functional, which makes use the information both lower upper bounds delay, proposed to drive a delay-dependent stabilization criterion. The criterion formulated in form non-convex matrix inequality, feasible solution can be...

A novel output current estimation and regulation circuit for the primary side controlled high power factor (PF) single-stage flyback LED is proposed in this paper. The composed of a negative feedback networks. can estimate then achieve through feedback. suitable discontinuous conduction mode (DCM) boundary (BCM). half-sine waveform followed by current, hence PF be achieved. Detailed theoretical analysis design considerations were presented. Two 340 mA/25 V laboratory driver prototypes...

This paper deals with the problem of environmental monitoring by developing an event-triggered finite-time control scheme for mobile sensor networks. The proposed can be executed each node independently and consists two parts: one part is a consensus algorithm while other rule. employed to enable positions velocities nodes quickly track position velocity virtual leader in finite time. rule used reduce updating frequency controllers order save computational resources nodes. Some stability...

An improved buck power factor correction (PFC) converter topology is proposed in this paper. By adding an auxiliary switch and two diodes, the dead zones ac input current of traditional PFC can be eliminated. constant ON-time control utilized to force it that operates critical conduction mode (CRM). With optimal parameters, nearly unit achieved harmonics meet IEC61000-3-2 class C standard within universal voltage range. Moreover, efficiency not deteriorated compared conventional converter....

A novel integrated buck-flyback nonisolated power factor (PF) correction (PFC) converter is proposed in this paper. This new an inherent integration of a buck and flyback converter, which operates either mode or according to whether the input voltage lower higher than output voltage. In way, dead zones ac current traditional PFC are eliminated. Therefore, can achieve high PF under universal range, its harmonics easily meet IEC61000-3-2 Class C limits. The efficiency not deteriorated...

According to the detailed essential concept of current balancing presented in this paper, an improved passive method based on capacitive scheme is proposed consequently. This can also be extended application isolated multioutput LED drivers. Compared with active achieve among strings, exhibits its attractive advantages cost efficiency and accuracy. Both macromodel simulation prototype experiment results demonstrate feasibility method. The precise steady state dynamic even considerably...

This paper deals with the problem of odor source localization by designing and analyzing a finite-time motion control strategy (FTMCS), which consists parallel algorithm circular algorithm. Specifically, architecture is first given includes two important modules: 1) coordinating module; 2) tracking module. In module, robots communicate each other to coordinate their virtual position velocity such that consensus accurate shape decided potential function can be reached within interval....

In order to reduce the dc-link voltage ripple and dc component of reactive power under unbalanced input conditions, a novel natural-frame-based control scheme for Vienna rectifier is proposed in this paper. First, by applying an early-developed direct decoupled synchronization method, fundamental positive/negative-sequence components are derived. Then, current loop designed based on mathematical modeling conditions. Based natural abc frame, considerably reduces total algorithm complexity...

This paper deals with the problem of odor source localization by designing and analyzing a decision-control system (DCS) for group robots. In decision level, concentration magnitude information wind detected robots are used to predict probable position source. Specifically, idea particle swarm optimization is introduced give in terms information. Moreover, an observation model built according information, Kalman filter estimate source, which combined obtained using order make on control two...

This paper deals with the problem of odor source localization by designing and analyzing a cooperative control framework (CCF) for particle swarm optimization (PSO) algorithm. The CCF consists three items: 1) position coordination item; 2) velocity 3) movement direction item. item is used to coordinate relative positions between particles improve exploration exploitation capabilities particles. enables velocities reach consensus in order realize orderly behaviors guides trace plumes locate...

This paper presents a decoupled path planning based on ant colony algorithm and distributed navigation with collision avoidance for multi-robot systems. An improved is proposed to plan reasonable collision-free each mobile robot of system in the scheme complicated static environment. The special functions are added into regular improve selective strategy. When an explores dead-corner searching, table established penalty function used trail intensity updated order avoid deadlock robot. A...

Abstract This paper is concerned with robust absolute stability of uncertain Lur'e systems neutral type . Some delay‐dependent criteria are obtained and formulated in the form linear matrix inequalities. The cover some existing results as their special cases. Neither model transformation nor bounding technique for cross terms involved through derivation criteria. Numerical examples show effectiveness Copyright © 2007 John Wiley &amp; Sons, Ltd.

The RRT algorithm can deal with the motion planning problems in consideration of non-holonomic differential constraints, but it does not taken into optimal path problem process. Random selection nodes leads to every cost relatively different because only use metric function new node selection. In this paper, an improved heuristic RRT-A* is proposed for robot constraints. algorithm, A-Star(A*) introduced optimize performance. Meanwhile, several functions are used as information respectively...

Based on the concept derivation, this paper proposes an improved synchronous rectifier (SR) driving strategy focusing quasi-resonant primary-side regulation (QR-PSR) Flyback converter, for applications of dc-dc front-end converter and ac-dc PFC both, to prevent reverse energy flowing in light-load/standby mode. Three different implementation candidates are exhibited analyzed. This proposed is programmable practical design with input voltage feedforward effect helpful achieving rigorous...

This paper proposed a four-wheel drive differential steering method for trajectory tracking. It designed an integral backstepping controller and constructed simple virtual feedback variable, simplified the design improved response speed precision of system. connected with Lyapunov stability criterion which proved control law global stability. The simulation experiment results verified effectiveness feasibility law.

In this paper, a novel complete coverage path planning method based on the biologically inspired neural networks, rolling and heuristic searching approach is presented for mobile robot motion with obstacles avoidance. The network used to model environment calculate information, while technique algorithm are utilized planning,. Simulation studies show that proposed very effective dynamic uncertain environments.

This article proposes an efficient and probabilistic complete planning algorithm to address motion problem involving orientation constraints for decoupled dual-arm robots. The is combine sampling-based method with analytical inverse kinematic calculation, which randomly samples constraint-satisfying configurations on the constraint manifold using solver incrementally connects them paths in joint space. As applied calculate configurations, proposed characterized by its efficiency accuracy. We...

Ethnopharmacological Relevance. TZQ-F has been traditionally used in Traditional Chinese Medicine as a formula for the treatment of diabetes. Aim Study. This study aims to compare pharmacologic effects and gastrointestinal adverse events between acarbose. Methods. The double-blind randomized placebo-controlled fivefold crossover was performed 20 healthy male volunteers. Plasma glucose, plasma IRI, C-peptide were measured assess effects. Flatus bowel activity event effect. Results. 3 4...

A novel control scheme with an adaptive neurodynamics and sliding mode for the dynamic tracking of a noholonomic mobile robot is presented. biologically inspired neural model embedded into standard backstepping-based velocity controller to eliminate or inhibit sharp speed jumps commonly existing in robots due errors changing suddenly. The proposed includes based planner as kinematics global dynamics robot. parameters adaptation presented arbitrary paths different initial posture errors....

Usually, distributed generations with natural energies bring negative effects to the utility grid. Microgrid various power sources is able eliminate these effects. A frequency domain-based method proposed in this paper for configuration and control design of a grid-connected microgrid. First, are configured based on their spectrum features. After that, follow-up applied sources, at point common couple (PCC) regulated follow up desired value. Detailed theoretical analysis presented. Finally,...

A nonlinear robust adaptive design scheme is proposed for turbine speed governor system with parametric uncertainties and unknown control gain, as well bounded exogenous disturbances. By combining the backstepping method disturbance attenuation technique, a systematic procedure developed such that resulting closed-loop globally uniformly ultimately bounded, main steam-valve open controller obtained consequently. In addition, possible singularity problem in some of existing schemes can be...

This paper addresses a box transport problem that requires the cooperation of multiple mobile robots. A geometric-based distributed formation control strategy is proposed for robots to push target, which might be static or dynamic. Velocity and hardware constraints are considered in advanced planning trajectory. Information sharing included because used as pushers cannot acquire required environmental information from their local sensors. Simulation results show effectiveness strategy.