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Roadway Inductive Power Transfer depends on robust and reliable primary magnetic couplers (pads), but existing pads use large quantities of ferrite, a brittle magnetic material. This paper presents two variations on the Double D topology to reduce or remove the ferrite thereby making the system more robust, using an additional coil to help shape the field instead. Simulations and laboratory validations...
We investigate the problem of computing Completely Independent Spanning Trees (CIST) under a practical approach. We aim to show that despite CISTs are very challenging to exhibit in some networks, they present a real interest in ad-hoc networks and can be computed to enhance the network robustness. We propose an original ILP formulation for CISTs and we show through simulation results on representative...
Active rectifier topologies are used for different purposes, especially widespread in renewable generation and distributed energy sources. The most common configuration for active rectifiers is the back-to-back converter. In this article, a back-to-back structure for connecting a variable frequency source to the utility grid is observed and a control algorithm, robust to grid impedance values, is...
Consensus based distributed robust adaptive finite-time secondary voltage control is designed for inverter-based islanded AC microgrids. The design combines decentralized local states information with the states of the neighboring distributed generators with directed communication topology. Robust control algorithms are used locally for each distributed generator to deal with uncertainty. Lyapunov...
Periodic speed errors can occur in permanent magnet linear synchronous machines for two reasons: 1) a periodic reference signal; 2) cogging force and friction. For reducing such periodic errors, iterative learning control or repetitive control approaches, used in conjunction with more common control actions, can be strongly effective. However, the design of the stability filter, robustness filter...
It is well-known that the communication among agents plays an important role in leader-following consensus. When the communication fails, it will greatly degrade the performance of the leader-following consensus. As technology develops, memory components are quite cheap. Thus it is very natural to use the information before the communication failure to enhance the robustness of leader-following consensus...
Part-based trackers are effective in exploiting local details of the target object for robust tracking. In contrast to most existing part-based methods that divide all kinds of target objects into a number of fixed rectangular patches, in this paper, we propose a novel framework in which a set of deformable patches dynamically collaborate on tracking of non-rigid objects. In particular, we proposed...
In this paper the calculations of the robustness of a network is addressed. After a brief description of the most relevant metrics, our Network Robustness Simulator(NRS) is presented as well as its structure and working model. The NRS computes the robustness I a dynamic scenario, it copes with multiple failures and different types of attack. In particular, the addition of the epidemic based model...
Content Delivery Networks (CDNs) are a key en-abler for the distribution of large amounts of data with high capacity and low latency. For instance, content streaming companies extensively use geographical distribution and replication to meet the ever-growing demand for media. Optical networks are the only future-proof technology available that meets the reach and capacity requirements of CDNs. However,...
This paper presents a hierarchical structure to solve the discrete time consensus problem for a group of agents. All the agents are divided into a couple of groups, and a new notation, called group information is proposed, which indicates all the agents' states inside one group. For each agent, it receives the information not only from the agent neighbors in the same group, but also the group information...
This paper is concerned with the distributed control for robust output regulation of multi-agent systems(MASs) with adaptive event-triggered mechanism. A novel distributed adaptive control law based on output feedback is developed, which can avoid using the minimal nonzero eigenvalue of Laplacian matrix associated with global system topology and reduce the frequency of data transmission. It is shown...
Robust adaptive time-varying formation control problems for high-order linear multi-agent systems with parameter uncertainties and external disturbances are investigated. Firstly, using the adaptive updating mechanism, a fully distributed time-varying formation control protocol is proposed. The protocol is determined by each agent in a fully distributed form and does not need any global information...
The article focuses on experimental measurement of multi-carrier narrowband Power Line Communication. The aim of experimental measurements was comparison of multi-carrier narrowband Power Line Communication from the view-point of possible communication distance, available data rate and impact of noise. The specifications G3-PLC and PRIME are considered. The field test results and data rate measurements...
In this paper, we consider the leader-follower consensus problem of multi-agent systems governed by second order dynamics with nonlinear terms. Taking into account the external disturbances, a leader-follower consensus tracking algorithm for each agent with high-order sliding mode control method is proposed to make all the followers track the leader. Then we prove that each agent can follow the leader...
This paper mainly concentrates on the consensus problem of the single integrator multi-agent systems with unbounded time-varying transmission delays and fixed directed topology. We show that the consensus problem can be solved under the spanning tree assumption and the no-cycle assumption. We characterize the no-cycle assumption and prove the consensus of multi-agent systems with an induction procedure...
In this paper, a robust H∞ decentralized controller is proposed for attitude coordination of spacecraft formation flying with external disturbance based on the relative attitudes and angular velocities of neighboring spacecraft. The controller is composed of nonlinear terms for performance enhancement and linear terms for attitude coordination and stabilization. The proposed control method guarantees...
In this paper, we propose a topology preserving graph matching (TPGM) method for partial face recognition. Most existing face recognition methods extract features from holistic face images, yet faces in real-world unconstrained environments are usually occluded by objects or other faces, which cannot provide the whole face images for recognition. Latest keypoint-based partial face recognition methods...
Swarm Robotics (SR) is expected to have a significant impact on society over the next decade. One of the contributing factors is that swarms are robust. However, robustness has not gained sufficient attention in the context of robotic swarms. This study focuses on the swarm network to generate insights as to how network topologies can be controlled to improve the robustness of SR systems. More specifically,...
We present optimization of photonic crystal cavities. The optimization problem is formulated to maximize the Purcell factor of a photonic crystal cavity. Both topology optimization and air-hole-based shape optimization are utilized for the design process. Numerical results demonstrate that the Purcell factor of the photonic crystal cavity can be significantly improved through optimization.
This article considers the robust cooperative control problem of multiple double-integrator agents' formation moving around a set of given curves on spheres, where each agent suffers an unknown spatiotemporal flowfield and the communication topology among agents is directed. The flow specification is composed of a general direction matrix and a responding unknown flow speed vector, which includes...
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