-
作者：Tiwari, Anuj; Devasia, Santosh
作者单位：University of Washington; University of Washington Seattle
摘要：Cohesion in networks during transitions from one consensus value to another, i.e., the ability of agents to respond in a similar manner during the transition, can be as important as achieving the new consensus value. Existing decentralized network control strategies mainly concern with the convergence speed to the final consensus value. However, even with increased convergence speed, the level of cohesion loss during transitions can be large. This loss of cohesion during transition (and tracki...
-
作者：Veedu, Mishfad Shaikh; Doddi, Harish; Salapaka, Murti, V
作者单位：University of Minnesota System; University of Minnesota Twin Cities; University of Minnesota System; University of Minnesota Twin Cities
摘要：In this article, we present a novel approach to reconstruct the topology of networked linear dynamical systems with latent nodes. The network is allowed to have directed loops and bi-directed edges. The main approach relies on the unique decomposition of the inverse of power spectral density matrix (IPSDM) obtained from observed nodes as a sum of sparse and low-rank matrices. We provide conditions and methods for decomposing the IPSDM into sparse and low-rank components. The sparse component y...
-
作者：Chen, Jun; Kumar, Ratnesh
作者单位：Oakland University; Iowa State University
摘要：This article studies the prognosis of failure, i.e., its prediction prior to its occurrence, in stochastic discrete event systems. Prior work has focused on the definition and offline verification of m-steps stochastic-prognosability, or S-m-prognosability, which allows the prediction of a fault at least m-steps in advance. This article complements the existing work by proposing an algorithm for the computation of online failure prognoser. The proposed algorithm reduces the condition for issui...
-
作者：Darup, Moritz Schulze; Book, Gerrit; Quevedo, Daniel E.; Nagahara, Masaaki
作者单位：Dortmund University of Technology; University of Paderborn; Queensland University of Technology (QUT); University of Kitakyushu
摘要：We investigate the implementation of a sparsitypromoting hands-off control scheme using the alternating direction method of multiplies (ADMM). In order to minimize the numerical control effort along with the actuation one, only a single ADMM iteration per time step is considered. We analyze the resulting closed-loop dynamics for linear systems with additive disturbances and show that the proposed scheme provides sparse controls as desired and, in addition, ensures input-to-state practical stab...
-
作者：Li, Xiaoyan; Hadjicostis, Christoforos N.; Li, Zhiwu
作者单位：Xidian University; University of Cyprus; Macau University of Science & Technology
摘要：Opacity is a confidentiality property that holds if certain secret behavior of a system, typically represented by a predicate, cannot be revealed under any system evolution. Among other proposed methodologies, when opacity is violated, it can be enforced using insertion mechanisms, i.e., by inserting symbols before an actual system output (in real time as the system evolves) in order to replace observation sequences that lead to opacity violations with observation sequences that can be generat...
-
作者：Marino, Riccardo; Tomei, Patrizio
作者单位：University of Rome Tor Vergata
摘要：The problem of global output tracking is addressed for stable minimum phase systems, with constant uncertain parameters and constant disturbances belonging to a known compact set, in the presence of input constraints such as amplitude saturation. The relative degree, the system order, and the sign of the high frequency gain are assumed to be known. A hybrid adaptive output feedback control is designed to achieve global asymptotic output tracking, provided that there exists an input within the ...
-
作者：Li, Zhi; Zhang, Ying; Wu, Ai-Guo
作者单位：Harbin Institute of Technology
摘要：In this article, a novel iterative algorithm is proposed to obtain the positive definite solutions of the discrete coupled Riccati matrix equations. In the presented algorithm, there are no operations of matrix inversion in all iterative steps. Another significant feature of this algorithm is that the latest updated information is used when the current estimation for each unknown matrix is conducted by taking the coupling structure of the discrete coupled Riccati matrix equations into consider...
-
作者：Zhu, Shiyong; Lu, Jianquan; Zhong, Jie; Liu, Yang; Cao, Jinde
作者单位：Zhejiang Normal University; Southeast University - China; Southeast University - China; Purple Mountain Laboratories; Yonsei University
摘要：In this article, a set of sensors is constructed via the pinning observability approach with the help of observability criteria given in [1] and [2], in order to make the given Boolean network (BN) be observable. Given the assumption that system states can be accessible, an efficient pinning control scheme is developed to generate an observable BN by adjusting the network structure rather than just to check system observability. Accordingly, the sensors are constructed, of which the form is co...
-
作者：Liu, Tong; Buss, Martin
作者单位：Technical University of Munich
摘要：In this article, the output feedback-based direct model reference adaptive control of piecewise affine systems and its parameter convergence are investigated. Under the slow switching assumption, it is shown that all the closed-loop signals are bounded and the output tracking error is small in the mean square sense. Built upon this result, the estimation error of controller parameters is proved to converge to a residual set if the input signal is sufficiently rich. The relationship between the...
-
作者：Vasquez-Beltran, Marco Augusto; Jayawardhana, Bayu; Peletier, Reynier
作者单位：University of Groningen; University of Groningen; Kapteyn Astronomical Institute
摘要：While it is widely used to represent hysteresis phenomena with unidirectional-oriented loops, we study in this article the use of Preisach operator for describing hysteresis behavior with multidirectional-oriented loops. This complex hysteresis behavior is commonly found in advanced materials, such as, shape-memory alloys or piezoelectric materials, that are used for high-precision sensor and actuator systems. We provide characterization of the Preisach operators exhibiting such input-output b...
