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Relaxed Stability Criteria for Time-Delay systems:A Novel Quadratic Function Convex Approximation Approach

IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 996-1006页

作者： Shenquan Wang Wenchengyu Ji Yulian Jiang Yanzheng Zhu Jian Sun College of Electrical and Electronic Engineering Changchun University of TechnologyChangchun 130012China the College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Complex Systems Intelligent Control and Decision Beijing Institute of TechnologyBeijing 100081China

This paper develops a quadratic function convex approximation approach to deal with the negative definite problem of the quadratic function induced by stability analysis of linear systems with time-varying *** introducing two adjustable parameters and two free variables,a novel convex function greater than or equal to the quadratic function is constructed,regardless of the sign of the coefficient in the quadratic *** developed lemma can also be degenerated into the existing quadratic function negative-determination(QFND)lemma and relaxed QFND lemma respectively,by setting two adjustable parameters and two free variables as some particular ***,for a linear system with time-varying delays,a relaxed stability criterion is established via our developed lemma,together with the quivalent reciprocal combination technique and the Bessel-Legendre *** a result,the conservatism can be reduced via the proposed approach in the context of constructing Lyapunov-Krasovskii functionals for the stability analysis of linear time-varying delay ***,the superiority of our results is illustrated through three numerical examples.

关键词： Equivalent reciprocal combination technique quadratic function convex approximation approach stability timevarying delay

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Object Helps U-Net Based Change Detectors

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 548-550页

作者： Lan Yan Qiang Li Kenli Li College of Computer Science and Electronic Engineering Hunan UniversityChangsha 410082China State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China

Dear Editor,This letter focuses on leveraging the object information in images to improve the performance of the U-Net based change *** detection is fundamental to many computer vision *** existing solutions based on ... 详细信息

关键词： Net computer networks

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Theoretical and experimental investigation of the resonance responses and chaotic dynamics of a bistable laminated composite shell in the dynamic snap-through mode

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 581-602页

作者： Meiqi WU Pengyu LV Hongyuan LI Jiale YAN Huiling DUAN Wei ZHANG State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceBIC-ESATCollege of EngineeringPeking UniversityBeijing 100871China Nanchang Innovation Institute of Peking University Nanchang 330096China Department of Mechanics Guangxi UniversityNanning 530004China

The dynamic model of a bistable laminated composite shell simply supported by four corners is further developed to investigate the resonance responses and chaotic *** existence of the 1:1 resonance relationship between two order vibration modes of the system is *** resonance response of this class of bistable structures in the dynamic snap-through mode is investigated,and the four-dimensional(4D)nonlinear modulation equations are derived based on the 1:1 internal resonance relationship by means of the multiple scales *** Hopf bifurcation and instability interval of the amplitude frequency and force amplitude curves are *** discussion focuses on investigating the effects of key parameters,e.g.,excitation amplitude,damping coefficient,and detuning parameters,on the resonance *** numerical simulations show that the foundation excitation and the degree of coupling between the vibration modes exert a substantial effect on the chaotic dynamics of the ***,the significant motions under particular excitation conditions are visualized by bifurcation diagrams,time histories,phase portraits,three-dimensional(3D)phase portraits,and Poincare ***,the vibration experiment is carried out to study the amplitude frequency responses and bifurcation characteristics for the bistable laminated composite shell,yielding results that are qualitatively consistent with the theoretical results.

关键词： bistable laminated composite shell dynamic snap-through mode Hopf bifurcation chaotic dynamics vibration experiment

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Completely Distributed Adaptive Observer for Unknown Linear System 43

Completely Distributed Adaptive Observer for Unknown Linear ...

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43rd Chinese Control Conference, CCC 2024

作者： Cao, Yuxi Wang, Jinzhi College of Engineering Peking University State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science Beijing100871 China

ISBN: (纸本)9789887581581

In this paper, a distributed adaptive observer scheme is designed for state reconstruction of linear time-invariant (LTI) systems with unknown dynamics. Specifically, a set of sensor nodes are deployed to distributedly measure the system state information, to restore the state and dynamics within it. Due to limitation of measurement capacity, individual node may not be able to measure the entire state. By achieving consensus with neighbors through a communication network, each node can adaptively reconstruct the system dynamics and estimate the system state asymptotically. The design of distributed adaptive observers for LTI systems with no input and with bounded unknown input are discussed, respectively. The completely distributed design in this paper requires no global information such as communication topology, collective measurement channel, or bound of the components of the system dynamics. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Sensor nodes

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Boundedness Analysis of Fully Distributed Event-Based Filtering 43

Boundedness Analysis of Fully Distributed Event-Based Filter...

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43rd Chinese Control Conference, CCC 2024

作者： Qian, Jiachen Duan, Zhisheng Zhang, Xilian Peking University State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Beijing100871 China

ISBN: (纸本)9789887581581

This paper focuses on event-based distributed filtering problem for a discrete LTI system, where the data-scheduler can regulate the communication between the smart sensor and the estimator to balance a trade-off between communication cost and filtering performance. This paper aims to combine the framework of consensus-on-information-based distributed filtering (CIDF) and the theory of harmonic-coupled algebraic Riccati equations (HCRE) to accurately evaluate the performance of event-based distributed filter. It is shown that the performance of the event-based distributed filter can be uniformly bounded by the solutions to harmonic-coupled algebraic Riccat equations, only with the collective observability condition and primitivity of the adjacency matrix corresponding to the communication topology. Moreover, the upper bound of the communication rate is also proposed in the form o the solutions to HCRE, which is more specific compared with the literature. Finally, the correctness of the theoretical results is demonstrated by several comparative numerical examples. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Riccati equations

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Assimilating satellite SST/SSH and in-situ T/S profiles with the Localized Weighted Ensemble Kalman Filter

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Acta Oceanologica Sinica 2022年第2期41卷 26-40页

作者： Meng Shen Yan Chen Pinqiang Wang Weimin Zhang College of Meteorology and Oceanology National University of Defense TechnologyChangsha 410073China Laboratory of Software Engineering for Complex Systems Changsha 410073China

The Localized Weighted Ensemble Kalman Filter(LWEnKF)is a new nonlinear/non-Gaussian data assimilation(DA)method that can effectively alleviate the filter degradation problem faced by particle filtering,and it has great prospects for applications in geophysical *** terms of operational applications,along-track sea surface height(AT-SSH),swath sea surface temperature(S-SST)and in-situ temperature and salinity(T/S)profiles are assimilated using the LWEnKF in the northern South China Sea(SCS).To adapt to the vertical S-coordinates of the Regional Ocean Modelling System(ROMS),a vertical localization radius function is designed for T/S profiles assimilation using the *** results show that the LWEnKF outperforms the local particle filter(LPF)due to the introduction of the Ensemble Kalman Filter(EnKF)as a proposal density;the RMSEs of SSH and SST from the LWEnKF are comparable to the EnKF,but the RMSEs of T/S profiles reduce significantly by approximately 55%for the T profile and 35%for the S profile(relative to the EnKF).As a result,the LWEnKF makes more reasonable predictions of the internal ocean temperature *** addition,the three-dimensional structures of nonlinear mesoscale eddies are better characterized when using the LWEnKF.

关键词： data assimilation Localized Weighted Ensemble Kalman Filter northern South China Sea sea surface height sea surface temperature temperature and salinity profiles mesoscale eddy

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A Structure-Preserving Learning Scheme on SO(3) 43

A Structure-Preserving Learning Scheme on SO(3)

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43rd Chinese Control Conference, CCC 2024

作者： Li, Tianzhi Wang, Jinzhi Peking University State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Beijing100871 China

ISBN: (纸本)9789887581581

Gaussian process regression has been extensively studied due to its ability for learning and predicting a dynamic process. Though this data-driven approach has received considerable attention, it shows the drawback of ignoring the physical prior of the system. In this paper, a structure-preserving Gaussian process regression is proposed for learning and predicting the SO(3) dynamics. The dynamics of the satellite is represented under the framework of geometric mechanics, which results in a reduced equations of motion. As such, by using variational mechanics the priori estimation is constructed to determine the posteriori mean during the Gaussian process regression. The obtained learning method inherits the advantages of the numerical integrator, such as energy-conserving and constraint-preserving. The benefits of the proposed approach are highlighted in a numerical simulation with a real cuboid satellite. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Gaussian process regression structure preservation Variational principle

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V-AUTOSAR: Graphical Modeling Language for AUTOSAR Architecture and Resource Modeling 22

V-AUTOSAR: Graphical Modeling Language for AUTOSAR Architect...

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22nd IEEE International Conference on Industrial Informatics, INDIN 2024

作者： Yang, Yilong Zhang, Yang Niu, Hongliang Yuan, Cangzhou Li, Qiangwei School of Software State Key Laboratory of Complex & Critical Software Environment Beihang University Beijing China School of Transportaton Science and Engineering Beihang University Beijing China

ISBN: (纸本)9798331527471

AUTOSAR enhances the management of complex automotive electrical and electronic architectures by improving the reusability and interchangeability of software modules between OEMs and suppliers. However, existing AUTOSAR modeling tools need help with non-intuitive representation and complicated architectural relationship modeling processes. In this paper, we propose a visual architecture modeling language to represent based on model-driven development of the system architecture design of vehicles. Our approach addresses these issues by implementing multi-dimensional visualization capabilities, incorporating two-dimensional graphical representations and detailed one-dimensional tabular displays. Furthermore, we introduce a practical’AUTOSAR meeting in the middle modeling method, which allows for separate modeling at different levels. This approach effectively harnesses the expertise of detailed bottom-level designers and high-level architects, improving efficiency in automotive system design. A detailed case study and evaluation substantiate the effectiveness of our modeling language in describing the system architecture. © 2024 IEEE.

关键词： Reusability

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Data-Driven Multi-Objective Optimization of Power Consumption and Quality for Finishing Rolling Process 13

Data-Driven Multi-Objective Optimization of Power Consumptio...

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13th IEEE Data Driven Control and Learning systems Conference, DDCLS 2024

作者： Chen, Xiaolu Yang, Ying College of Engineering Peking University State Key Laboratory for Turbulence & Complex Systems Department of Mechanics and Engineering Science Beijing100871 China

ISBN: (纸本)9798350361674

This paper investigates the operational optimization in the context of the steel hot rolling production and finishing facilities. Optimizing the operational variables of the finishing rolling process can improve the rolling quality and reduce the unit power consumption. However, there are too many operational variables in the process and their interactions are strongly coupled, making it difficult to develop an effective model for in-depth study. Therefore, this paper adopts a data-driven approach, using neural network algorithms to construct the data prediction models between performance and set values respectively. Multi-objective optimization of the set values is performed by combining the actual mechanism and equipment constraints. In the obtained Pareto optimal solutions, the conflicting choices are further balanced among multiple objectives to obtain the most suitable operating parameters. Experimentally verified using production line production data, the method proposed in this paper significantly improves the performance indexes. © 2024 IEEE.

关键词： Multiobjective optimization

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A Reliability Prediction Method for AUTOSAR Architecture Considering Unreliable Platforms 22

A Reliability Prediction Method for AUTOSAR Architecture Con...

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22nd IEEE International Conference on Industrial Informatics, INDIN 2024

作者： Yuan, Cangzhou Niu, Hongliang Zhang, Yang Yang, Yilong Li, Qiangwei School of Software State Key Laboratory of Complex & Critical Software Environment Beihang University Beijing China School of Transportaton Science and Engineering Beihang University Beijing China

ISBN: (纸本)9798331527471

With the trend of intelligence, automobile architecture has become more complex. It is necessary to predict and discover reliability-related issues to reduce the cost of correction in the later period. In AUTOSAR-based automotive architecture design, software and hardware interaction, middleware platform behavior, physical environment, and system usage profile affect the system’s reliability. It is necessary to comprehensively consider these factors to predict the system’s reliability reasonably. However, existing methods often overlook the influence of some factors, especially oversimplifying the control flow of the middleware platform in the system. Resulting in difficulty in effectively modeling the behavior of the AUTOSAR middleware platform in error propagation and its impact on system failure behavior. To analyze the impact of middleware platforms on failure behavior, this paper analyzes the impact of the AutoSAR middleware platform on application software faults based on error propagation methods. Then, expand the AUTOSAR meta-model to model reliability parameters and automatically convert the architecture model into a formal model for reliability prediction. Finally, the effectiveness of considering unreliable platform behavior modeling was verified through a car headlight design case study. © 2024 IEEE.

关键词： Middleware

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