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作者：Li, Haomin; Nahid-Mobarakeh, Babak; Emadi, Ali
作者单位：McMaster University
摘要：We show that the pair (speed, rotor position) of interior permanent magnet synchronous motors is not globally observable, and the number of all indistinguishable pairs is at most four, an invariant independent of any parameter. This result follows as a corollary by virtue of characterizing the observability condition as a special restricted form of the injectivity of a family of polynomials via immersion. The field-oriented control (FOC), which causes the collapse of at most two indistinguisha...
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作者：Liu, Di; Besselink, Bart; Baldi, Simone; Yu, Wenwu; Trentelman, Harry L.
作者单位：Southeast University - China; University of Groningen; Technical University of Munich; Southeast University - China
摘要：This work proposes a reachability approach to characterize how disturbances and safety propagate in a mixed platoon, i.e., a platoon with human-driven vehicles followed by a single automated vehicle. We look at the behavior of the leading vehicle as a unit-energy disturbance and study how this energy propagates along the states and the outputs of the system. To describe the propagation, we make use of ellipsoidal sets, and give conditions based on linear matrix inequalities to describe inclusi...
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作者：Zhang, Chencheng; Yang, Hao; Jiang, Bin; Cao, Ming
作者单位：Nanjing University of Aeronautics & Astronautics; University of Groningen
摘要：This article investigates the flocking control of a swarm with a malicious agent that falsifies its controller parameters to cause collision, division, and escape of agents in the swarm. A novel geometric flocking condition is established by designing the configuration of the malicious agent and its neighbors, under which we propose a hierarchical geometric configuration-based flocking control method. To help detect the malicious agent, a parameter estimate mechanism is also provided. The prop...
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作者：Chen, Shixiang; Garcia, Alfredo; Hong, Mingyi; Shahrampour, Shahin
作者单位：Chinese Academy of Sciences; University of Science & Technology of China, CAS; Texas A&M University System; Texas A&M University College Station; University of Minnesota System; University of Minnesota Twin Cities; Northeastern University
摘要：Coordinated group behavior arising from purely local interactions has been successfully modeled with distributed consensus-seeking dynamics, where the local behavior is aimed at minimizing the disagreement with neighboring peers. However, it has been recently shown that when constrained by a manifold geometry, distributed consensus-seeking dynamics may ultimately fail to converge to a global consensus state. In this article, we study discrete-time consensus-seeking dynamics on the Stiefel mani...
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作者：Deng, Chao; Xu, Lei; Yang, Tao; Yue, Dong; Chai, Tianyou
作者单位：Nanjing University of Posts & Telecommunications; Northeastern University - China
摘要：In this article, we investigate the distributed cooperative optimization problem for heterogeneous uncertain high-order nonlinear multi-agent systems with an intermittent communication network, where each agent can only share information with its neighbors in some disjoint time intervals. To address this problem, the design process consists of constructing a distributed optimization algorithm and designing a decentralized tracking controller. To design a distributed optimization algorithm, vir...
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作者：Liu, Tong; Zhang, Zengjie; Liu, Fangzhou; Buss, Martin
作者单位：Technical University of Munich; Harbin Institute of Technology; Eindhoven University of Technology
摘要：In this note, we develop an adaptive observer for a class of nonlinear systems with switched unknown parameters to estimate the states and parameters simultaneously. The main challenge lies in how to eliminate the disturbance effect of zero-input responses caused by the switching on the parameter estimation. These responses depend on the unknown states at switching instants (SASI) and constitute an additive disturbance to the parameter estimation, which obstructs parameter convergence to zero....
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作者：Wu, Chengshuai; Dimarogonas, Dimos V.
摘要：A geometric generalization of contraction theory called k-contraction was recently developed using k-compound matrices. In this article, we focus on the relations between k-contraction and two other generalized contraction frameworks: partial contraction (also known as virtual contraction) and horizontal contraction. We show that in general these three notions of contraction are different. We here provide new sufficient conditions guaranteeing that partial contraction implies horizontal contra...
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作者：Li, Rui; Zhao, Nan; Zhang, Qi; Chu, Tianguang
作者单位：Dalian University of Technology; University of International Business & Economics; Peking University
摘要：In this article, we prove new connections between two frameworks for analysis and control of Boolean networks: the invariant subspace framework and the quotient framework. Each method, in different ways, produces a smaller model but preserves enough information about the original network. We make precise the connection between models reduced by the two methods. The results show equivalence between invariant subspace and quotient approaches for wide classes of analysis and control problems.
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作者：Wan, Neng; Li, Dapeng; Song, Lin; Hovakimyan, Naira
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; University of Illinois System; University of Illinois Urbana-Champaign; Southern University of Science & Technology
摘要：A simplified analysis is performed on the Bode-type filtering sensitivity tradeoff integrals, which capture the sensitivity characteristics of the estimate and estimation error with respect to the process input or estimated signal in continuous- and discrete-time linear time-invariant filtering systems. Compared with the previous analyses based on complex analysis and Cauchy's residue theorem, the analysis results derived from the simplified method are more explicit, thorough, and require less...
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作者：Yang, Lixin; Xu, Yong; Lv, Weijun; Li, Jun-Yi; Shi, Ling
作者单位：Guangdong University of Technology; Hong Kong University of Science & Technology
摘要：This article studies the optimal transmission scheduling for remote state estimation over multihop networks. A smart sensor observes a dynamic system, and sends its local state estimate to a remote estimator (RE). To save energy, multihop networks are deployed to relay data packets from the smart sensor to the RE. The smart sensor needs to decide the hop number communicating with the RE by adjusting its transmission power. To minimize the estimation error and the energy consumption, the transm...
