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2023 China Automation Congress, CAC 2023

作者： Shao, Haiyan Wu, Tao Zhang, Jinkai Wang, Na Li, Anyang Yang, Tongliang School of Mechanical Engineering University of Jinan & Institute of Control Valve Technology Jinan China Institute of Control Valve Technology Ji'Nan Huibang Automatic Control Instrument Co. Ltd. Jinan China School of Mechanical Engineering University of Jinan Jinan China

ISBN: (纸本)9798350303759

The electric actuator holds significant importance within the process industry. Its fundamental operation involves the conversion of input signals into a linear displacement to drive regulating mechanism actions. This paper focus on enhancing the mechanical structure through the innovative modules such as the manual-automatic switching module, the compact main transmission mechanism, and efficient limit module. The developed intelligent control system enables functionalities like positive and negative effect setting, manual and automatic switching, and fault status display. Additionally, the integrated sensor facilitates real-time data acquisition and characteristic curve display software, fostering effective human-computer interaction. Finally, the actuator's strength and control precision undergo validation through fatigue experiments and vibration experiments. © 2023 IEEE.

关键词： Data acquisition

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Potential sliding zone recognition method for the slow-moving landslide based on the Hurst exponent

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第10期16卷 4105-4124页

作者： Haiqing Yang Lili Qu Lichuan Chen Kanglei Song Yong Yang Zhenxing Liang State Key Laboratory of Coal Mine Disaster Dynamics and Control School of Civil EngineeringChongqing UniversityChongqing400045China Technology Innovation Center of Geohazards Automatic Monitoring Ministry of Natural Resources(Chongqing Institute of Geology and Mineral Resources)Chongqing401120China

The abrupt occurrence of the Zhongbao landslide is totally unexpected,resulting in the destruction of local infrastructure and river *** review the deformation history of the Zhongbao landslide and prevent the threat of secondary disasters,the small baseline subsets(SBAS)technology is applied to process 59 synthetic aperture radar(SAR)images captured from Sentinel-1A ***,the time series deformation of the Zhongbao landslide along the radar line of sight(LOS)direction is calculated by SBAS ***,the projection transformation is conducted to determine the slope ***,the Hurst exponent of the surface deformation along the two directions is calculated to quantify the hidden deformation development trend and identify the unstable deformation *** the suddenness of the Zhongbao landslide failure,the multi-temporal interferometric synthetic aperture radar(InSAR)technology is the ideal tool to obtain the surface deformation history without any monitoring *** obtained deformation process indicates that the Zhongbao landslide is generally stable with slow creep deformation before ***,the Hurst exponent distribution on the landslide surface in different time stages reveals more deformation evolution information of the Zhongbao landslide,with partially unstable areas detected before the *** potential unstable areas after the Zhongbao landslide disaster are revealed by the Hurst exponent distribution and verified by the GNSS monitoring results and deformation mechanism *** method combining SBASInSAR and Hurst exponent proposed in this study could help prevent and control secondary landslide disasters.

关键词： Zhongbao landslide Interferometric synthetic aperture radar (InSAR)technology Hurst exponent Deformation process Unstable area identification

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Analysis of fast prototyping of microcontroller-based ML software for acoustic signal classification 26

Analysis of fast prototyping of microcontroller-based ML sof...

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26th IEEE Signal Processing: Algorithms, Architectures, Arrangements, and Applications, SPA 2023

作者： Marciniak, Filip Marciniak, Wojciech Marciniak, Tomasz Poznan University of Technology Faculty of Computing and Telecommunications Poznań60-965 Poland Poznan University of Technology DECYBEL Science Club Poznań60-965 Poland Poznan University of Technology Faculty of Automatic Control Robotics and Electrical Engineering Institute of Automatic Control and Robotics Division of Electronic Systems and Signal Processing Poznań60-965 Poland

ISBN: (纸本)9798350304985

The paper analyzes the preparation of software for acoustic signal classification with machine learning techniques for microcontrollers. The design process was tested for three types of devices: Nordic Thingy:53, *** and Arduino Nano 33 BLE Sense Lite. The classifier training process was carried out using the Edge Impulse platform. Experimental studies were carried out for the process of classifying sound signals generated by the vacuum cleaner motor. The results of the training and the model test were presented for different configurations. © 2023 Division of Signal Processing and Electronic systems, Poznan University of technology (DSPES PUT).

关键词： Microcontrollers

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An adaptive large neighborhood search for the multi-point dynamic aggregation problem

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control Theory and technology 2024年第3期22卷 360-378页

作者： Shengyu Lu Bin Xin Jie Chen Miao Guo School of Automation Beijing Institute of TechnologyBeijing 100081China National Key Lab of Autonomous Intelligent Unmanned Systems Beijing 100081China Department of Control Science and Engineering Tongji UniversityShanghai 201804China

The multi-point dynamic aggregation(MPDA)problem is a challenging real-world *** the MPDA problem,the demands of tasks keep changing with their inherent incremental rates,while a heterogeneous robot fleet is required to travel between these tasks to change the time-varying state of each *** robots are allowed to collaborate on the same task or work separately until all tasks are *** is challenging to generate an effective task execution plan due to the tight coupling between robots abilities and tasks'incremental rates,and the complexity of robot *** effectiveness consideration,we use the variable length encoding to avoid redundancy in the solution *** creatively use the adaptive large neighborhood search(ALNS)framework to solve the MPDA *** the proposed algorithm,high-quality initial solutions are generated through multiple problem-specific solution construction *** heuristics are also used to fix the broken solution in the novel integrated decoding-construction repair process of the ALNS *** results of statistical analysis by the Wilcoxon rank-sum test demonstrate that the proposed ALNS can obtain better task execution plans than some state-of-the-art algorithms in most MPDA instances.

关键词： Adaptive large neighborhood search(ALNS) Multi-point dynamic aggregation(MPDA) Heuristic solution construction Multi-robot collaboration

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On the Exact Linearization of Minimally Underactuated Configuration Flat Lagrangian systems in Generalized State Representation

arXiv

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arXiv 2024年

作者： Hartl, Georg Gstöttner, Conrad Kolar, Bernd Schöberl, Markus Institute of Automatic Control and Control Systems Technology Johannes Kepler University Linz Altenberger Strasse 69 Linz4040 Austria

In this paper, we examine the exact linearization of configuration flat Lagrangian control systems in generalized state representation with p degrees of freedom and p−1 control inputs by quasi-static feedback of its generalized state. We formally introduce generalized Lagrangian control systems, which are obtained when configuration variables are considered as inputs instead of forces. This work presents all possible lengths of integrator chains achieved by an exact linearization with a quasi-static feedback law of the generalized state that allows for rest-to-rest transitions. We show that such feedback laws can be systematically derived without using Brunovský states. © 2024, CC BY.

关键词： Lagrange multipliers

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Monte Carlo Analysis and Optimization of Inertial Switch Tolerance of a Proximity Fuze 4

Monte Carlo Analysis and Optimization of Inertial Switch Tol...

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4th International Conference on Defence technology, ICDT 2024

作者： Zhao, Xin Sa, Haijing Qiu, Liliang Zhang, Wenyi Song, Rongchang CSSC Systems Engineering Research Institute Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory beijing China

Aiming at the low operation rate of the firing mechanism of ammunition fuze, robustness analysis and probabilistic design methods were introduced into the fuze design to carry out system simulation research on performance prediction and optimization of the firing mechanism of ammunition fuze. In this paper, the dynamic model of the inertial impact switch of a proximity fuze is established, and the mechanism can be reliably triggered under nominal values by simulation method. Based on the Monte Carlo simulation of dimensional tolerance distribution, the trigger performance is evaluated. The contribution rate of each dimension variable to the target value is obtained by using the optimal Latin hypercube experiment design, and the variable tolerance with greater contribution rate is optimized by Pointer algorithm. After optimization, the range of variable Jdxh_f was optimized from 0.1274 to 0.1666 to 0.1274 to 0.1556. Finally, the optimized results were validated, with a uniform distribution yielding 0.003193517N, a bimodal distribution yielding 0.2230769N, and a normal distribution yielding *** validation analysis of these results shows that the target value distribution data after optimization meets the design *** study seeks a balance between performance reliability and manufacturing cost, which is of great significance to improve product performance and reduce manufacturing cost. © 2024 institute of Physics Publishing. All rights reserved.

关键词： Normal distribution

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Disturbance observer-based backstepping control for hypersonic flight vehicles without use of measured flight path angle

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Chinese Journal of Aeronautics 2021年第2期34卷 396-406页

作者： Yao Lu Beijing Aerospace Automatic Control Institute Beijing 100854China National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing 100854China

In this paper a nonlinear control method is proposed for the tracking control of hypersonic flight vehicles. The designed control laws do not utilize the measured flight path angle due to its inferior accuracy in practical engineering. For this, an estimated flight path angle is designed via the measurements of the altitude and velocity. A tracking differentiator is designed for constructing nonlinear disturbance observer which is used to estimate the model uncertainties including the parameter indeterminacies and external disturbances in the channels of velocity and pitch rate. A robust high-order differentiator is introduced to avoid the employment of the measured flight path angle and estimate the lumped disturbance in dynamics of flight path angle. Meanwhile, the possible saturation of the control inputs is considered and compensated by the auxiliary states. The boundness of closed-loop signals is proved through the Lyapunov theory. Comparative simulations are carried out and the results demonstrate the effectiveness of the proposed method.

关键词： Anti-saturation Backstepping Disturbance observer Flight control Hypersonic flight vehicle State estimation

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Constructive Function Approximation with Local Models 32

Constructive Function Approximation with Local Models

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32nd Mediterranean Conference on control and Automation, MED 2024

作者： Mavridis, Christos N. Johansson, Karl Henrik School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Division of Decision and Control Systems Stockholm Sweden

ISBN: (纸本)9798350395440

We introduce a constructive function approximation approach as a general tool, particularly useful in adaptive and data-driven methods for perception and control. The key idea is to estimate of a collection of simple local models as opposed to a single and complex regression model trained in the entire input space. We use principles from the Online Deterministic Annealing (ODA) optimization framework to construct an adaptive partition of the input space, which enables the introduction of local function approximation models within each subset of the partition. We show that both the partitioning and the local model training algorithms are stochastic approximation algorithms that operate online, and with the same observations, as part of a two-timescale stochastic approximation scheme. This process constitutes a heuristic method to gradually increase the complexity of the function approximation framework in a task-agnostic manner, giving emphasis to regions of the input space where the regression error is high. As a result this framework has inherent explainability properties, and is suitable for continuous learning applications where regression improvement without retraining from scratch is crucial. Simulation results illustrate the properties of the proposed approach. © 2024 IEEE.

关键词： Heuristic methods

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Observations of data characteristics and irregularities through domain-oriented transformations of attributes 28th

Observations of data characteristics and irregularities thro...

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28th International Conference on Knowledge Based and Intelligent information and Engineering systems, KES 2024

作者： Stanczyk, Urszula Baron, Grzegorz Department of Computer Graphics Vision and Digital Systems Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Akademicka 2A Gliwice44-100 Poland

The paper presents research dedicated to observations of relations between attribute properties and discretisation. In the investigations described, the gradually increasing sets of features were discretised by selected approaches, and several variants of data were constructed. The continuous, partially discrete, and completely translated datasets were explored by the chosen classifiers and their performance studied in the context of a number of discretised attributes, discretisation procedures, and the way of processing of features and datasets. The stylometric problem of authorship attribution was the machine learning task under study. The experimental results enable to observe closer the specificity of style-markers employed as characteristic features, and indicate conditions for efficient recognition of authorship. They can be extended to other application domains with similar characteristics. © 2024 The Authors.

关键词： Data assimilation

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Distributed Model Predictive control for Periodic Cooperation of Multi-Agent systems

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IFAC-PapersOnLine 2023年第2期56卷 3158-3163页

作者： Matthias Köhler Matthias A. Müller Frank Allgöwer University of Stuttgart Institute for Systems Theory and Automatic Control 70550 Stuttgart Germany Leibniz University Hannover Institute of Automatic Control 30167 Hanover Germany

We consider multi-agent systems with heterogeneous, nonlinear agents subject to individual constraints that want to achieve a periodic, dynamic cooperative control goal which can be characterised by a set and a suitable cost. We propose a sequential distributed model predictive control (MPC) scheme in which agents sequentially solve an individual optimisation problem to track an artificial periodic output trajectory. The optimisation problems are coupled through these artificial periodic output trajectories, which are communicated and penalised using the cost that characterises the cooperative goal. The agents communicate only their artificial trajectories and only once per time step. We show that under suitable assumptions, the agents can incrementally move their artificial output trajectories towards the cooperative goal, and, hence, their closed-loop output trajectories asymptotically achieve it. We illustrate the scheme with a simulation example.

关键词： Predictive control distributed MPC multi-agent systems cooperative control nonlinear systems

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