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This paper propose an asynchronous impulsive control scheme for consensus of second-order multi-agent systems. The proposed control scheme do not require time synchronization among agents. Each agents has its won clock to determine the impulsive instants. By using discretization approaches and the stochastic matrix theory, it is find that the stability of the proposed control scheme depends on the...
This technical note is aimed at studying the joint impacts of the system dynamic structure and the communication topology on the synchronization of multi-linear positive systems. Through rigorous analysis, necessary and sufficient conditions are given to guarantee the coupled systems achieving positive synchronization under the distributed control protocol, and the gain matrix designed is related...
Cascaded or distributed module-level inverters are becoming increasingly desirable for photovoltaic applications. The authors have demonstrated an AC-stacked topology that allows each inverter to operate completely autonomously from all the others. The only required communications is a low-bandwidth synchronization signal communicated from the point-of-grid-connection. This paper describes the communications...
This paper presents three three-phase AC-DC configurations in which two are unidirectional and have reduced switch count. The investigated topologies have one DC-link and are composed by two converters in series connection through transformers, that process part of the total power, while the conventional converters have two DC-links and a transformer processing all the power. The replacement of switches...
Four unidirectional AC-DC-AC three-level and two-level three-leg converters are proposed in this paper. This converters are composed of an unidirectional rectifier and a bidirectional inverter, using three-level and two-level legs and an unidirectional NPC leg at rectifier side. When compared with the two-level leg, the three-level leg presents voltage stress reduction on switches for the same DC-link...
Due to its modularity and scalability, modular multilevel converter is a promising topology for medium voltage applications, such as energy storage or motor drives. Because of the large number of modules, the wiring can become complex if the conventional star topology communication network is used. To solve this issue, a communication link that uses a ring topology to connect the central controller...
In this paper, we apply outer synchronization to identify unknown parameters existing in the node dynamics between two interacted networks. According to the coupling and interacted matrices, we design the corresponding adaptive control schemes and updating laws to achieve the outer synchronization. By the Lyapunov functional theory, we derive two theorems of the appearance of outer synchronization...
This paper presents a guidance law design for synchronized path following of multiple underactuated unmanned surface vehicles (USVs) without using a global reference velocity. Firstly, a distributed observer is proposed to eliminate the need of reference velocity known to all the vehicles. Secondly, a line-of-sight based guidance law is derived to force each vehicle to follow a parameterized path...
Time-Sensitive Networking (TSN) is becoming more important in automotive and industrial sectors. There is no clear strategy how to use TSN to improve and migrate the established real-time protocols without excluding legacy devices. This paper presents a realistic concept to integrate TSN into automation networks. We choose Sercos as a deterministic Industrial-Ethernet protocol to be extended with...
Communications within power converters is becoming increasingly important particularly with the evolution of multilevel converters having distributed control structures. In the not so distant past, communications were used primarily for reference point setting and monitoring. Currently however communication is taking on an integral role in the control of the power converters particularly those with...
In HPC applications, it is widely understood that in situ systems will play a significant role in next generation systems. The rate that next-generation leadership machines will be able to generate data will exceed the bandwidths of the planned I/O systems, leading to a need for in situ processing of the resulting data to reduce it. There have been a number of techniques proposed for in situ workflow...
This paper proposes a distributed 3D pose synchronization law to achieve a common pose with a desired trajectory for a group of quadrotors. The dynamics of networked quadrotors is first derived, and a pose synchronization scheme is proposed. In the present controller design, linear approximation and passivation techniques are employed, which respectively enable to independently handle the yaw angle,...
The network plays a key role in High-Performance Computing (HPC) system efficiency. Unfortunately, current HPC routing solutions are not application-aware, and therefore cannot deal with the sudden HPC traffic bursts and their resulting congestion peaks.To address this problem, we introduce Routing Keys, a scalable routing paradigm for HPC networks that decouples intra- and inter-application flow...
This paper discusses the cluster synchronization problem of complex dynamical networks consisted of Lur'e systems. Since the special topology structure of the complex network and the existence of stochastic phenomena, a kind of randomly occurring pinning controller is designed which not only synchronizes all Lur'e systems in the same cluster but also decreases the influence among different clusters...
This paper proposes a fault tolerant cooperative control strategy for a class of complex network systems with the time varying interconnection topology. The general neighboring rule-based linear cooperative protocol is developed and a sufficient synchronization condition is derived. Moreover, it is shown that the target point is still reached with the proposed fault tolerant cooperative control method...
In this paper, we respectively discuss passivity of multi-weighted complex dynamical networks with fixed and switching topologies. Firstly, several passivity criteria for the complex dynamical network with fixed topology and multi-weights are established by employing Lyapunov functional approach and inequality techniques. Furthermore, similar methods are used to derive some sufficient conditions for...
In this paper, we present a generalized lag synchronization-based method to identify the exact topology of uncertain complex networks with time delay and noise perturbation. By designing new controllers and novel adaptive identification rules, the unknown topological structure of the network is successfully identified in the process of synchronization. Meanwhile, we discuss the effect of time delay...
The synchronization problem of linearly coupled reaction-diffusion neural networks with switching topology is discussed in this paper. At first, a generalized intermittent control and its adaptive strategy are introduced. This type of control strategy can unify the traditional periodic intermittent control and the aperiodic case, and the adaptive control gains depend on space as well as time. Moreover,...
The synchronization of multi-weighted complex dynamical networks with fixed and switching topologies is respectively investigated in this paper. Firstly, by putting to use Lyapunov functional approach and some inequality techniques, we establish a synchronization criterion for the multi-weighted complex dynamical network with fixed topology. In addition, the similar methods can be applied to get some...
This paper provides a simple approach for group consensus of networked gyroscopes systems from the analytical dynamics point of view. By using the Udwadia-Kalaba fundamental equation theory, a novel robust group control law is presented and a sufficient condition which ensure achieving group consensus of non-identical gyroscopes networks is given in this paper. Finally, numerical simulations conducted...
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