This paper introduces a new multi-mode Extended Kalman Filter (EKF) algorithm for attitude estimation of small UAVs during the whole flight (from take off to landing). At first, it examines the available INS/GPS measu...
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The main objective of the synchronization of multi-agent systems is the asymptotic convergence of the agents towards a common trajectory. This paper considers the synchronization of linear discrete-time agents over a ...
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In real-world industrial scenarios, fault detection faces the widely recognized challenge of data imbalance, which not only refers to the scarcity of fault data but also includes the imbalance in healthy data. This ar...
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This paper describes and summarizes the current state of the development for making the Virtual control Laboratory (VCLab) a GRID application within the ELeGI project. It introduces shortly into GRID techniques and sh...
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This paper describes and summarizes the current state of the development for making the Virtual control Laboratory (VCLab) a GRID application within the ELeGI project. It introduces shortly into GRID techniques and shows how this GRIDifying process is performed to offer virtual scientific experiments (VSE) on the GRID. The architecture and some technical details of the prototype implementation are presented. The next steps in the development are outlined concerning the collaboration aspects of conducting VSEs. The authoring of VSEs is sketched by some proposals of authoring tools. A vision into the future emphasizes the VCLab as a component in a learning environment with a new learning paradigm.
Orientation measurement of objects is vital in micro *** this paper,we present a novel method based on monocular microscopic vision for 3-D orientation measurement of objects with planar *** proposed methods aim to me...
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Orientation measurement of objects is vital in micro *** this paper,we present a novel method based on monocular microscopic vision for 3-D orientation measurement of objects with planar *** proposed methods aim to measure the orientation of the object,which does not require calibrating the intrinsic parameters of microscopic *** our methods,the orientation of the object is firstly measured with analytical computation based on feature *** results of the analytical computation are coarse because the information about feature points is not fully *** order to improve the precision,the orientation measurement is converted into an optimization process base on the relationship between deviations in image space and in Cartesian space under microscopic *** results of the analytical computation are used as the initial values of the optimization *** optimized variables are the three rotational angles of the object and the pixel equivalent *** objective of the optimization process is to minimize the coordinates differences of the feature points on the *** precision of the orientation measurement is boosted *** and comparative results validate the effectiveness of the proposed methods.
The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, construct...
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The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, constructed with the lumped element modeling(LEM) and the artificial bee colony(ABC) algorithm, was proposed to efficiently predict the combination of waveform parameters for obtaining the desired droplet properties. For acquiring higher simulation accuracy, a modified dynamic lumped element model(DLEM) was proposed with time-varying equivalent circuits, which can characterize the nonlinear behaviors of piezoelectric printhead. The proposed method was then applied to investigate the influences of various waveform parameters on droplet volume and velocity of nano-silver ink, and to predict the printing quality using nano-silver ink. Experimental results show that, compared with two-dimension manual search, the proposed optimal prediction model perform efficiently and accurately in searching the appropriate combination of waveform parameters for printable electronics fabrication.
In this paper, the influence of sampling intervals on the chattering in sliding mode （SM） control systems is considered. The describing function （DF） approach is employed to analyze the chattering characteristics ...
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In this paper, the influence of sampling intervals on the chattering in sliding mode （SM） control systems is considered. The describing function （DF） approach is employed to analyze the chattering characteristics in the sampling SM control. By the DF calculations and limit cycle existence conditions, an unstable limit cycle and two stable limit cycles are found in the SM control system. The frequencies and amplitudes of the two limit cycles can also be estimated by graphical calculations. The estimation accuracy of chattering parameters is evaluated by the simulations. The results of simulations show that the system could converge to a large and a small limit cycle from different initial conditions.
This paper is aimed at reviewing the notion of Byzantine-resilient distributed computing systems, the relevant protocols and their possible applications as reported in the literature. The three agreement problems, nam...
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This paper is aimed at reviewing the notion of Byzantine-resilient distributed computing systems, the relevant protocols and their possible applications as reported in the literature. The three agreement problems, namely, the consensus problem, the interactive consistency problem, and the generals problem have been discussed. Various agreement protocols for the Byzantine generals problem have been summarized in terms of their performance and level of fault-tolerance. The three classes of Byzantine agreement protocols discussed are the deterministic, randomized, and approximate agreement protocols. Finally, application of the Byzantine agreement protocols to clock synchronization is highlighted.
The paper deals with the relation between diagnosability of deterministic I/O automata and state equivalence. Diagnosability criteria are formulated in terms of the existence of equivalent automaton states. The absenc...
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Event-based control aims at reducing the information exchange over the communication network in control systems. This paper presents an extension of an existing event-based state-feedback approach that reduces the com...
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