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arXiv 2025年

作者： El Bourkhissi, Lahcen Necoara, Ion Department of Automatic Control and Systems Engineering National University of Science and Technology Politehnica Bucharest Romania Department of Automatic Control and Systems Engineering National University of Science and Technology Politehnica Bucharest Bucharest060042 Romania Gheorghe Mihoc-Caius Iacob Institute of Mathematical Statistics and Applied Mathematics of the Romanian Academy Bucharest050711 Romania

In this paper, we consider nonconvex optimization problems with nonlinear equality constraints. We assume that the objective function and the functional constraints are locally smooth. To solve this problem, we introduce a linearized q penalty based method, where q ∈ (1, 2] is the parameter defining the norm used in the construction of the penalty function. Our method involves linearizing the objective function and functional constraints in a Gauss-Newton fashion at the current iteration in the penalty formulation and introduces a quadratic regularization. This approach yields an easily solvable subproblem, whose solution becomes the next iterate. By using a novel dynamic rule for the choice of the regularization parameter, we establish that the iterates of our method converge to an ǫ-first-order solution in O(1/ǫ2+(q−1)/q) outer iterations. Finally, we put theory into practice and evaluate the performance of the proposed algorithm by making numerical comparisons with existing methods from literature. © 2025, CC BY.

关键词： Numerical methods

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The Energy Method for the Diagnosis of the Emergency Modes of Electrohydraulic Complex Electromechanical systems 4

The Energy Method for the Diagnosis of the Emergency Modes o...

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4th IEEE International Conference on Modern Electrical and Energy System, MEES 2022

作者： Korenkova, Tetyana Kovalchuk, Viktoriya Al-Mashakbeh, Atef Saleh Rodkin, Dmytro Kremenchuk Mykhailo Ostrohradskyi National University Department of Systems of Automatic Control and Electric Drive Kremenchuk39600 Ukraine Tafila Technical University Department of Electrical Engineering Tafila66110 Jordan

ISBN: (纸本)9798350346831

A method for diagnosing unsteady modes of electrohydraulic complex electromechanical systems based on monitoring of energy processes as part of the variable-frequency electric drive of the pump has been developed. It is based on the analysis of instantaneous power derivatives and its amplitude-frequency characteristics at all elements of the energy channel. Diagnostic signs of the identification of emergency modes have been determined and a set of organizational and technical measures has been formulated to prevent the development of an unsteady mode by using hydrodynamic and cavitation protection devices, active energy absorbers and devices for reducing dynamic loads in pipeline networks. © 2022 IEEE.

关键词： Dynamic loads

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The Fundamental Limitations of Learning Linear-Quadratic Regulators

The Fundamental Limitations of Learning Linear-Quadratic Reg...

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IEEE Conference on Decision and control

作者： Bruce D. Lee Ingvar Ziemann Anastasios Tsiamis Henrik Sandberg Nikolai Matni Department of Electrical and Systems Engineering University of Pennsylvania Automatic Control Laboratory ETH Zurich Division of Decision and Control Systems KTH Royal Institute of Technology

We present a local minimax lower bound on the excess cost of designing a linear-quadratic controller from offline data. The bound is valid for any offline exploration policy that consists of a stabilizing controller and an energy bounded exploratory input. The derivation leverages a relaxation of the minimax estimation problem to Bayesian estimation, and an application of van Trees inequality. We show that the bound aligns with system-theoretic intuition. In particular, we demonstrate that the lower bound increases when the optimal control objective value increases. We also show that the lower bound increases when the system is poorly excitable, as characterized by the spectrum of the controllability gramian of the system mapping the noise to the state and the $\mathcal{H}_{\infty}$ norm of the system mapping the input to the state. We further show that for some classes of systems, the lower bound may be exponential in the state dimension, demonstrating exponential sample complexity for learning the linear-quadratic regulator.

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Physics-inspired Neural Networks for Parameter Learning of Adaptive Cruise control systems

arXiv

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arXiv 2023年

作者： Apostolakis, Theocharis Ampountolas, Konstantinos Automatic Control and Autonomous Systems Laboratory Department of Mechanical Engineering University of Thessaly Volos38334 Greece

This paper proposes and develops a physics-inspired neural network (PiNN) for learning the parameters of commercially implemented adaptive cruise control (ACC) systems in automotive industry. To emulate the core functionality of stock ACC systems, which have proprietary control logic and undisclosed parameters, the constant time-headway policy (CTHP) is adopted. Leveraging the multi-layer artificial neural networks as universal approximators, the developed PiNN serves as a surrogate model for the longitudinal dynamics of ACC-engaged vehicles, efficiently learning the unknown parameters of the CTHP. The PiNNs allow the integration of physical laws directly into the learning process. The ability of the PiNN to infer the unknown ACC parameters is meticulously assessed using both synthetic and high-fidelity empirical data of space-gap and relative velocity involving ACC-engaged vehicles in platoon formation. The results have demonstrated the superior predictive ability of the proposed PiNN in learning the unknown design parameters of stock ACC systems from different car manufacturers. The set of ACC model parameters obtained from the PiNN revealed that the stock ACC systems of the considered vehicles in three experimental campaigns are neither L2 nor L∞ string stable. © 2023, CC BY-NC-ND.

关键词： Adaptive cruise control

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Game theory system optimization in a supplier-customer transport network

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Procedia Computer Science 2023年 221卷 1036-1043页

作者： Radu Bilbiie Dumitru Popescu Catalin Dimon Marius Teme Pierre Borne Department of Automatic Control and Systems Engineering University Politehnica of Bucharest Bucharest Romania Ecole Centrale de Lille Villeneuve d'Ascq France

The development of modern IT technologies and resources, offer in many economic-industrial applications, efficient solutions for planning and managing of specific activities. New research directions in the field of management and optimization of supply-customer (SC) systems are defined and evaluated. The paper proposes a management model based on a causal graph structure, which expresses the connection and interdependence between the two entities involved in the specific activities of the field, the suppliers of goods and services and the consumers of these goods and products. Information related to production and storage capacity, up-to-date requirements for customer needs, delivery planning, production and consumption dynamics are considered. The transport between the actors involved in the system is an important component with weight in the costs of supply-sale activities. The optimal solution for the supply-customer transport system is proposed based on different strategies of game theory.

关键词： supplier customer services causal graph control network transport system management game theory

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Analysis of hybridization for the use of hydrogen for aircraft propulsion in an existing platform

Analysis of hybridization for the use of hydrogen for aircra...

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AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2023

作者： de Frutos, Víctor M. Parra, Juan R. Esteban, Sergio Bordons, Carlos Systems Engineering and Automatic Control Escuela Técnica Superior de Ingeniería de Sevilla Universidad de Sevilla Sevilla Spain Aeroespace Engineering Department Escuela Técnica Superior de Ingeniería de Sevilla Universidad de Sevilla Sevilla Spain

ISBN: (纸本)9781624107047

This work presents a methodology to analyze the hybridization use of fuel cells, batteries, and combustion engines to supply the power needed for flight in all the phases. The analysis is performed on a case study analyzing the diagram Payload vs. Range for different degrees of hybridization and solutions as well as different technology levels of the main components of the propulsion system based on fuel cells. The penalty in the utilization of hydrogen with fuel cells in the aircraft is high. Several hybridization strategies are analyzed to comply with more demanding sizing requirements as take-off. The calculation methodology is applied for regional aircraft to evaluate the impact of the introduction of fuel cell as a propulsion system in an existing platform and extended to other aviation segments. The objective of the presented work is to determine if green propulsion with fuel cells is possible, and in which flight segments is more suitable, so it is analyzed the improvement needed in the fuel cell technologies and energy storage and also different A/C are analyzed. Finally, it is faced the impact in the design point of the aircraft for the introduction of this new technology. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Fuel cells

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Dynamics Loads of the Automated Electric Drive for Moving FKM-500 Filter-Press Plates 5

Dynamics Loads of the Automated Electric Drive for Moving FK...

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5th IEEE International Conference on Modern Electrical and Energy System, MEES 2023

作者： Khrebtova, Oksana Zachepa, Iurii Zachepa, Nataliia Nekrasov, Andriy Pavlo, Kvitash Hrytsai, Oleksandr Kremenchuk Mykhailo Ostrohradskyi National University Department of Systems of Automatic Control and Electric Drive Kremenchuk Ukraine Kremenchuk Mykhailo Ostrohradskyi National University Electrical Engineering Kremenchuk Ukraine Kremenchuk Mykhailo Ostrohradskyi National University Department of Jurisprudence Sciences Kremenchuk Ukraine

ISBN: (纸本)9798350359787

Operational loads have both static and dynamic characteristics. Dynamic loads occur during the operation of the considered mechanism, both during acceleration and deceleration periods, as well as during steady motion due to the movement of the moving element along an uneven path caused by the presence of the working environment on the elements over which the filter-press plates are moving. The dynamic loading is significant and affects the formation of plate-side displacements during their movement while performing the technological operation. Experimental studies of the load on the movement elements were conducted to determine optimal control modes for the filter-press plate movement mechanism, aiming to avoid overloading during stopping and filter jamming. To analyze the loading, discretization of random processes of the filter movement mechanism loading was performed. The sequence of calculating the statistical characteristics of the schematized dynamic process is presented. Based on experimental data, mathematical calculation of the results of schematization and the type of probability distribution law was carried out. To select the law that best reflects the experimental data distribution of load amplitudes, the Kolmogorov-Smirnov goodness-of-fit criterion was applied. According to the calculation results, it was found that the Weibull distribution law adequately reflects the distribution of amplitudes since its corresponding Kolmogorov-Smirnov criterion value is the smallest. © 2023 IEEE.

关键词： Dynamic loads

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On Convergence in Distribution of Stein's Unbiased Risk Hyper-parameter Estimator for Regularized System Identification 41

On Convergence in Distribution of Stein's Unbiased Risk Hype...

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第41届中国控制会议

作者： Yue Ju Tianshi Chen Biqiang Mu Lennart Ljung School of Data Science and Shenzhen Research Institute of Big Data The Chinese University of Hong Kong Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and System ScienceChinese Academy of Sciences Division of Automatic Control Department of Electrical EngineeringLink?ping University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Asymptotic theory for the regularized system identification has received increasing interests in recent *** this paper,for the finite impulse response(FIR) model and filtered white noise inputs,we show the convergence in distribution of the Stein's unbiased risk estimator(SURE) based hyper-parameter estimator and find factors that influence its convergence *** particular,we consider the ridge regression case to obtain closed-form expressions of the limit of the regression matrix and the variance of the limiting distribution of the SURE based hyper-parameter estimator,and then demonstrate their relation numerically.

关键词： Asymptotic theory Stein's unbiased risk estimator Hyper-parameter estimator Regularized system identification

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On output consensus of heterogeneous dynamical networks

arXiv

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arXiv 2024年

作者： Su, Yongkang Su, Lanlan Khong, Sei Zhen Department of Automatic Control & Systems Engineering University of Sheffield Sheffield United Kingdom Department of Electrical Engineering National Sun Yat-Sen University Kaohsiung80424 Taiwan

This work is concerned with interconnected networks with non-identical subsystems. We investigate the output consensus of the network where the dynamics are subject to external disturbance and/or reference input. For a network of output-feedback passive subsystems, we first introduce an index that characterises the gap between a pair of adjacent subsystems by the difference of their input-output trajectories. The set of these indices quantifies the level of heterogeneity of the networks. We then provide a condition in terms of the level of heterogeneity and the connectivity of the networks for ensuring the output consensus of the interconnected network. Copyright © 2024, The Authors. All rights reserved.

关键词： Heterogeneous networks

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Disturbance Attenuation in the Euler–Bernoulli Beam with Viscous and Kelvin–Voigt Damping via Piezoelectric Actuators

Disturbance Attenuation in the Euler–Bernoulli Beam with Vi...

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IEEE Conference on Decision and control

作者： Anton Selivanov Emilia Fridman Department of Automatic Control and Systems Engineering The University of Sheffield UK School of Electrical Engineering Tel Aviv University Israel

We design a state-feedback controller, applied via piezoelectric actuators, that suppresses the effect of a distributed disturbance in the Euler-Bernoulli beam with viscous and Kelvin-Voigt damping. The controller is designed to improve performance on a finite number of modes. Its effect on the remaining (infinitely many) modes is analysed by constructing an appropriate Lyapunov functional, whose properties are guaranteed by the feasibility of linear matrix inequalities (LMIs). The LMIs allow us to design suitable controller gain and estimate the induced $L^2$ gain. A numerical example demonstrates how this modal decomposition approach leads to a controller that significantly reduces the $L^2$ gain.

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