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Phase-locked loops (PLLs) are very important in power and energy areas. Many PLLs have been proposed in recent literatures, and all these methods are to design a robust filter and let them be as a preprocessing tool before the synchronous reference frame PLL (SRF-PLL) input. Among these PLLs, a interesting PLL is Least-Error Squares (LES) Filter-Based PLL (LES-PLL), which is composed of a LES filter...
In this paper, we investigate the chaos synchronization of uncertain optical chaotic systems. More precisely, we also present a systematic approach for designing a fractional-order sliding mode controller to achieve a rapid, robust and perfect chaos synchronization. By this robust controller, it is rigorously proven that the associated synchronization error is Mittag-Leffler stable. In a numerical...
We present a novel multimodal interaction framework supporting robust human-robot communication. We consider a scenario where a human operator can exploit multiple communication channels to interact with one or more robots in order to accomplish shared tasks. Moreover, we assume that the human is not fully dedicated to the robot control, but also involved in other activities, hence only able to interact...
For a novel conveying mechanism which is highly nonlinear, highly time-varying and highly coupled, a synchronized sliding mode control with nonlinear disturbance observer is proposed to improve the synchronization performance and the disturbance-rejection performance. First, the kinematic analysis of the conveying mechanism is completed and the dynamic model with lumped disturbances of the conveying...
We present new methods of simultaneously estimating camera geometry and time shift from video sequences from multiple unsynchronized cameras. Algorithms for simultaneous computation of a fundamental matrix or a homography with unknown time shift between images are developed. Our methods use minimal correspondence sets (eight for fundamental matrix and four and a half for homography) and therefore...
Over the last few years, the combination synchronization of chaotic system receives a special attention. This paper introduces the idea of combination synchronization into complex networks. Based on sliding mode control (SMC) principle, the finite-time combination synchronization (FTCS) of four uncertain complex networks which combining as the form of A+B+C-D is investigated. And there are unknown...
This paper describes the development of a concept for a European GNSS based robust synchronization service. The service concept is designed upon the infrastructure of the Galileo and EGNOS systems and includes specific features for establishing a robust service suitable for critical infrastructures.
CMOS power dissipation has multiple components: switching, short-circuit, and static. In order to be robust to power attacks, digital logic should eliminate the relation between processed data and each and every power component. Other sources of side-channel information are glitches and the early evaluation of signals. We improve over our previous work and propose a Look-Up Table (LUT) with increased...
Synchronization of a class of fractional-order chaotic triangular systems is studied through observer in this paper. Based on the fractional Lyapunov stability theory, a robust observer is designed. The proposed method can guarantee the stability of the closed-loop system as well as the convergence of the synchronization errors. Finally, the effectiveness of the proposed method is confirmed by a simulation...
In this paper, we present a new distributed protocol to achieve the synchronization of time variations and initial times simultaneously. The protocol combines the design methods of controller and estimator to obtain more precise synchronization with higher robustness against noisy inputs mainly generated by crystal oscillators of clocks. Furthermore, the control input is ensured bounded while achieving...
In this paper, we design a fast and efficient energy-based and asynchronous neighbor discovery protocol for the Internet of Things (IoT). In our solution, we relax the assumption of frame-level synchronization. We formulate a novel asynchronous group testing scheme and apply it to the neighbor discovery problem. We then show that our proposed scheme is able to detect the set of K active neighbors1...
This paper deals with the leaderless synchronization of multiple agents modeled by nonlinear uncertain Euler-Lagrange equations with unmeasurable velocities and bounded control inputs. An adaptive cooperative control law is proposed to the entire group sync with uncertainty. Due to the fact that the closed-loop interconnected Euler-Lagrange equations employing this algorithm are non-autonomous, Matrosov's...
This paper proposes a RISE-based cooperative control of uncertain multi-agent system with exogenous disturbances. First, we introduce the second order model with disturbance for agent. The network topology among agents is undirected and connected, and information of reference is allowed to be available to at least one agent. Second, we propose the control law consists of graph theory, consensus algorithm...
In this paper, we concentrate on equalization algorithms for amplitude and phase-modulated (APM) signals in non-cooperative burst communication, and have designed a multi-modulus blind equalization algorithm based on cyclic iteration. The algorithm could achieve a faster and more effective blind equalization while just using the samples of the receiver. Proposed scheme has a lower complexity, better...
Exploiting correlations in the audio, several works in the past have demonstrated the ability to automatically match and synchronize User Generated Video (UGV) files of the same event. In this paper, we focus on the challenging acoustic environment of a large scale athletic event. We show that the chanting of the crowd produces an acoustic background common in the audio streams of different UGVs and...
In the era of social media, a large number of user-generated videos are uploaded to the Internet every day, capturing events all over the world. Reconstructing the event truth based on information mined from these videos has been an emerging challenging task. Temporal alignment of videos “in the wild” which capture different moments at different positions with different perspectives is the critical...
Two systematic adaptive control approaches are applied for tracking and regulating the Lorenz chaotic system. The adaptive synchronization approach is implemented with 3 individual controllers used in the Lyapunov function design. The adaptive backstepping control is also introduced with a single controller at much less control efforts. The asymptotic stability for both proposed control laws has been...
This paper presents a stochastic distributed algorithm for robust learning in networks of asynchronous sampled-data systems characterized by strongly connected directed graphs, where the response map of each sampled-data system has a quadratic structure, and the interactions between systems describe a Nash game. It is assumed that each sampled-data system has an individual resetting clock, as well...
Robust wide baseline pose estimation is an essential step in the deployment of smart camera networks. In this work, we highlight some current limitations of conventional strategies for relative pose estimation in difficult urban scenes. Then we propose a solution which relies on an adaptive search of corresponding interest points in synchronized video streams which allows us to converge robustly towards...
Crosstalk cancellation is an important issue in loudspeaker-based virtual auditory. Most of the correlated researches focus on far-field situation. This paper addresses near-field crosstalk cancellation problem, which has more challenges and seldom been addressed. Firstly loudspeaker can no longer be modeled as point source so that the head related transfer functions (HRTF) is very difficult to measure...
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