Article
Automation & Control Systems
Ran Huang, Zhengtao Ding
Summary: This article investigates delay compensation in consensus control under undirected graphs using output feedback. Two distributed adaptive output feedback consensus protocols are proposed, one ensuring local consensus and the other proven to be a global consensus controller under certain conditions. Simulation results on neutrally stable systems validate the effectiveness of the proposed scheme.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2021)
Article
Engineering, Electrical & Electronic
Jian Pan, Qing Xu, Keqiang Li, Jianqiang Wang
Summary: In this paper, the problem of cloud control of the connected vehicle with time-varying communication-induced sensing delay and control delay is investigated. A discrete linear output feedback system model with bounded input and output delay is proposed for the connected vehicle cloud control system containing communication-induced delay. A predictor-observer structured controller is introduced and redesigned to actively compensate for the delay in both output and input channels. The stability of the control system and a sufficient stability condition are analyzed.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Automation & Control Systems
Yuanjiu Wang, Wei Lin
Summary: This article studies the tolerability of a globally asymptotically stabilizable nonlinear system by smooth feedback with respect to input delay. It introduces the concept of semiglobal input delay tolerance and presents a control framework for the asymptotic analysis/synthesis of input delay tolerance of multi-input-multi-output nonlinear systems under smooth feedback. The article proves the existence of semiglobal input delay tolerance in certain cases through the use of various theorems.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Engineering, Civil
Piotr Adam Bonkowski, Juliusz Kus, Zbigniew Zembaty
Summary: Recent research in engineering seismology has highlighted the importance of considering rotational components in addition to translational seismic excitations when calculating design seismic loads for structures. In the analysis of a 64m high steel mine tower under rocking and horizontal seismic actions, it was observed that the rocking component may either reduce or substantially increase the seismic response of the structure, depending on the type of ground motion.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Physics, Applied
Zhi-Min Cai, Zong-Bo Ma, You-Kai Zhao, Fu-Cheng Liu, Ya-Feng He
Summary: Directional transport-dominated particle separation is challenging in various technological applications. This study proposes a design of a dusty plasma ratchet system for separating micrometer-sized particles. The particles are charged and suspended at specific heights in a saw channel, allowing bidispersed particles to flow in opposite directions and achieve a high purity of separation.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Civil
Weiqi Bai, Hairong Dong, Zixuan Zhang, Yidong Li
Summary: This study systematically investigates the coordinated control problem for a multiple high-speed train system subject to unknown communication delays. By constructing a nonlinear control model and designing distributed control laws, faster convergence rate during the train status adjustment process is achieved.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Physics, Fluids & Plasmas
G. R. Archana, Debashis Barik
Summary: This study numerically investigates the effect of roughness in symmetric periodic potential on the negative mobility of a driven inertial Brownian ratchet. The research shows that the microscopic spatial heterogeneity of the potential can generate negative mobility, which would not otherwise be possible under a smooth potential. The findings highlight the constructive role of roughness in the anomalous transport properties of Brownian ratchet.
Article
Mathematics, Applied
Cong Zhai, Weitiao Wu
Summary: The study proposes an extended lattice model incorporating multiple connected vehicles and continuous delay feedback control signals to effectively control traffic flow in challenging traffic environments.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Computer Science, Artificial Intelligence
Ruihong Xiu, Wei Zhang
Summary: In this paper, we contribute to the study of coupled neural network systems controlled by event-triggered impulses. We establish a novel set of coupled system models and controllers that focus on the time-delay and occurrence of impulsive control. We propose a convergent limit averaging study approach to investigate the system and obtain sufficient conditions for stabilization and synchronization.
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTATIONAL INTELLIGENCE
(2023)
Article
Acoustics
Jiyuan Hu, Valiollah Ghaffari, Saleh Mobayen, Jihad H. Asad, Mai The Vu
Summary: A robust composite nonlinear feedback control method is proposed for time-delayed uncertain systems, solving the tracking problem by considering system limitations. Controller parameters are determined through a solution for linear matrix inequality, and numerical simulation demonstrates the efficiency of the method.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Physics, Multidisciplinary
Yingxue Cui, Lijuan Ning
Summary: This paper investigates the transport of coupled particles in a fractional feedback potential driven by two bounded noises. The study calculates the mean velocity of the particles and examines its relationship with the fractional order, barrier height, noise intensity, coupling intensity, and static length. The results show that the fractional order of the feedback potential affects the switching frequency and transport speed of the particles. The superposition of bounded noises also increases the mean velocity. Optimal values for the fractional order and static length are found to maximize the velocity. These findings have implications for the treatment of diseases related to neurotransmitter transport disorder.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Automation & Control Systems
Hanqi Zhou, Junyong Zhai
Summary: This paper addresses the stabilization problem for a class of nonlinear time-varying delay systems with unknown growth rates and output function. It designs an adaptive observer with dynamic gain and an adaptive controller with Lyapunov-Krasovskii functional to achieve global stabilization of the closed-loop system. The effectiveness of the controller is verified through two examples.
Article
Engineering, Aerospace
Monia Makhoul, Philippe Beltrame
Summary: This paper investigates the possibility of selectively transporting microparticles suspended in air in a microgravity environment through modulated channels without causing net displacement of air. The direction of particle transport can be controlled by the kind of pumping used, demonstrating intermittent particle drift under the Stokes assumption of fluid flow. The selective transport is interpreted as a deterministic ratchet effect due to spatial variations in flow and particle drag, which could potentially be applied to the selective transport of metal particles in short microgravity experiments.
MICROGRAVITY SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
C. J. O. Reichhardt, C. Reichhardt
Summary: In this study, we investigate a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field. An applied external ac drive can induce a ratchet effect at zero magnetic field, and the addition of a magnetic field leads to new behaviors, including transverse ratchet motion. The system also exhibits commensuration effects and nonmonotonic ratchet efficiency.
NEW JOURNAL OF PHYSICS
(2023)
Article
Engineering, Marine
Juan Li, Huadong Zhang, Tao Chen, Jiaqi Wang
Summary: This paper designs a controller for the control problem of AUV pilot-following formation with communication delay and interruption, using the feedback linearization and PD control method. The formation topology is simulated using the Markov random jump process in the event of communication interruption. The stability convergence condition of the AUV pilot-following formation is analyzed in the presence of time-varying delay and Markov transformation topology. A Lyapunov-Krasovskii equation is established, and LMI is used to solve the problem of communication interruption and delay, obtaining the boundary conditions of error convergence of the control system. The effectiveness of the formation coordination controller based on the second-order integral model under unstable underwater acoustic communication conditions is verified by simulation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Physics, Mathematical
Sarah A. M. Loos, Sabine H. L. Klapp
JOURNAL OF STATISTICAL PHYSICS
(2019)
Article
Physics, Multidisciplinary
Thomas Martynec, Sabine H. L. Klapp, Sarah A. M. Loos
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Sarah A. M. Loos, Sabine H. L. Klapp
NEW JOURNAL OF PHYSICS
(2020)
Article
Mechanics
Timo J. Doerries, Sarah A. M. Loos, Sabine H. L. Klapp
Summary: This paper explores the correlation functions of stochastic systems with memory, focusing on molecules or colloids moving through complex fluid environments. It introduces 'toy' models with three degrees of freedom to analyze complex forms of memory, showing that the coupling topology of the system affects autocorrelation functions. Additionally, the study demonstrates that even two auxiliary variables can generate surprisingly complex memory and correlation functions.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Multidisciplinary
Sarah A. M. Loos, Simon Hermann, Sabine H. L. Klapp
Summary: The distribution of delays has a significant impact on the linear stability and thermodynamic properties of time-delayed stochastic systems. Increasing the mean delay time can destabilize or stabilize the process, depending on the distribution of the delay. For all considered distributions, the heat dissipated by the controlled system may become negative, indicating that delay forces extract energy and entropy from the environment. In particular, exponential delay shows a pronounced refrigerating effect and yields the largest stable parameter regions, making it the most effective and robust type of delayed feedback.
Article
Physics, Multidisciplinary
Viktor Holubec, Artem Ryabov, Sarah A. M. Loos, Klaus Kroy
Summary: A new class of stochastic delay processes with nonlinear time-local forces and linear time-delayed forces has been introduced, which obey fluctuation theorems and converge to a Boltzmann equilibrium at long times. These processes are stable, energetically passive, and computationally provide exact constraints on general nonlinear stochastic delay problems, suggesting potential applications in perturbative analysis. Physically, they can be interpreted as underdamped Brownian particles in different thermal baths, showing promising experimental implications.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Viktor Holubec, Daniel Geiss, Klaus Kroy, Frank Cichos, Sarah A. M. Loos
Summary: Numerical investigation shows that an increasing delay time initially benefits collective ordering but later hinders it in the Vicsek model, causing a transition from diffusive to ballistic dynamical scaling. This provides an alternative explanation for swarm traits previously attributed to inertia.
PHYSICAL REVIEW LETTERS
(2021)
Editorial Material
Nanoscience & Nanotechnology
Sarah A. M. Loos
Summary: The non-equilibrium activity of the cytoskeleton network can be measured by studying the bending dynamics of embedded nanotube probes at various time and length scales.
NATURE NANOTECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Sarah A. M. Loos, Sabine H. L. Klapp, Thomas Martynec
Summary: We investigate a two-dimensional, nonreciprocal XY model, where spins interact with their nearest neighbors within a specific angle, known as the vision cone. Through energetic analysis and Monte Carlo simulations, we find the emergence of a true long-range ordered phase. The crucial factor is the configuration-dependent bond dilution caused by the vision cones. Interestingly, defects propagate in a directional manner, breaking the parity and time-reversal symmetry of the spin dynamics, which can be detected by a nonzero entropy production rate.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Sarah A. M. Loos, Saeed Arabha, Ali Rajabpour, Ali Hassanali, Edgar Roldan
Summary: We investigate the heat transfer between two nanoparticles at different temperatures interacting through nonreciprocal forces. Our simulations demonstrate the possibility of constructing nano refrigerators that transfer heat from a cold to a hot reservoir using power exerted by nonreciprocal forces. By applying stochastic thermodynamics to a simplified Langevin model, we derive analytical predictions for work, heat, and efficiency fluctuations, which are consistent with molecular dynamics simulation results. Our study also provides design principles for minimizing entropy production while achieving desired power fluctuation uncertainty in nano refrigerators.
SCIENTIFIC REPORTS
(2023)
Article
Mathematics, Applied
Jakub Sawicki, Rico Berner, Sarah A. M. Loos, Mehrnaz Anvari, Rolf Bader, Wolfram Barfuss, Nicola Botta, Nuria Brede, Igor Franovic, Daniel J. Gauthier, Sebastian Goldt, Aida Hajizadeh, Philipp Hoevel, Omer Karin, Philipp Lorenz-Spreen, Christoph Miehl, Jan Moelter, Simona Olmi, Eckehard Schoell, Alireza Seif, Peter A. Tass, Giovanni Volpe, Serhiy Yanchuk, Juergen Kurths
Summary: Adaptivity is a dynamic feature that is present in nature, socio-economics, and technology. It appears in various real-world systems and plays a crucial role in closed-loop control strategies and machine learning algorithms. This article provides an interdisciplinary perspective on adaptivity, discussing its concept and terminology in different disciplines and highlighting its importance in various fields. It also addresses common challenges and suggests future research directions to inspire interdisciplinary approaches.
Article
Multidisciplinary Sciences
Sarah A. M. Loos, Sabine H. L. Klapp
SCIENTIFIC REPORTS
(2019)
Article
Physics, Fluids & Plasmas
Sarah A. M. Loos, Sabine H. L. Klapp
Proceedings Paper
Physics, Applied
Anna Zakharova, Sarah A. M. Loos, Julien Siebert, Aleksandar Gjurchinovski, Jens Christian Claussen, Eckehard Schoell
CONTROL OF SELF-ORGANIZING NONLINEAR SYSTEMS
(2016)
Article
Physics, Fluids & Plasmas
Sarah A. M. Loos, Jens Christian Claussen, Eckehard Schoell, Anna Zakharova
