检索结果-内蒙古大学图书馆

arXiv 2020年

作者： Holicki, Tobias Scherer, Carsten W. Trimpe, Sebastian The Department of Mathematics University of Stuttgart Pfaffenwaldring 5a Stuttgart70569 Germany The Institute for Data Science in Mechanical Engineering RWTH Aachen University Germany The Intelligent Control Systems Group Max Planck Institute for Intelligent Systems Stuttgart Germany

For a partially unknown linear systems, we present a systematic control design approach based on generated data from measurements of closed-loop experiments with suitable test controllers. These experiments are used to improve the achieved performance and to reduce the uncertainty about the unknown parts of the system. This is achieved through a parametrization of auspicious controllers with convex relaxation techniques from robust control, which guarantees that their implementation on the unknown plant is safe. This approach permits to systematically incorporate available prior knowledge about the system by employing the framework of linear fractional representations. Copyright © 2020, The Authors. All rights reserved.

关键词： Linear matrix inequalities

来源：评论

学校读者我要写书评

暂无评论

Trajectory tracking for quadrotors with attitude control on S2× S1

arXiv

引用

arXiv 2019年

作者： Kooijman, Dave Schoellig, Angela P. Antunes, Duarte J. Control Systems Technology group Mechanical Engineering Eindhoven University of Technology Netherlands Canada

The control of a quadrotor is typically split into two subsequent problems: finding desired accelerations to control its position, and controlling its attitude and the total thrust to track these accelerations and to track a yaw angle reference. While the thrust vector, generating accelerations, and the angle of rotation about the thrust vector, determining the yaw angle, can be controlled independently, most attitude control strategies in the literature, relying on representations in terms of quaternions, rotation matrices or Euler angles, result in an unnecessary coupling between the control of the thrust vector and of the angle about this vector. This leads, for instance, to undesired position tracking errors due to yaw tracking errors. In this paper we propose to tackle the attitude control problem using an attitude representation in the Cartesian product of the 2-sphere and the 1-sphere, denoted by S2× S1. We propose a non-linear tracking control law on S2× S1that decouples the control of the thrust vector and of the angle of rotation about the thrust vector, and guarantees almost global asymptotic stability. Simulation results highlight the advantages of the proposed approach over previous approaches. Copyright © 2019, The Authors. All rights reserved.

关键词： Attitude control

来源：评论

学校读者我要写书评

暂无评论

Tensor Product Model-based Robust Flutter control Design for the FLEXOP Aircraft

引用

IFAC-PapersOnLine 2019年第12期52卷 134-139页

作者： Béla Takarics Bálint Vanek Control Systems Group Department of Electrical Engineering Eindhoven University of Technology 5612 AE Eindhoven The Netherlands Control Systems Technology Department of Mechanical Engineering Eindhoven University of Technology 5612 AE Eindhoven The Netherlands

This paper presents a flutter suppression control design methodology for the aircraft designed within the European research project, FLEXOP. The aim of the flutter suppression controller is to stabilize the aeroelastic modes and to extend the aircraft’s flutter free envelope. The first step is to develop a low order control oriented linear parameter varying (LPV) model of the aircraft. This is based on the "bottom-up" modeling approach. The key idea is to reduce the order of the subsystems that form the nonlinear aeroservoelastic model. A critical requirement of the low order model is to capture the flutter modes accurately. The second step is the control design, which is based on polytopic LPV representation. The Tensor Product (TP) type polytopic model of the aircraft is obtained with TP model transformation. TP model transformation in a numerical method based on the higher order singular value decomposition (HOSVD). It can generate various types of convex representations for LPV systems and offers a trade-off between the accuracy and the complexity of the resulting TP model. The control structure is a parameter-varying state feedback and observer. The control design specifications include asymptotic stability, robustness against parameter variations influencing the flutter modes and constraint on the control values in order to keep the control signals low. The developed control system is validated by simulation using the high-fidelity, nonlinear model.

关键词： Aeroservoelasticity linear parameter-varying systems polytopic robust control

来源：评论

学校读者我要写书评

暂无评论

Stable recovery of entangled weights: Towards robust identification of deep neural networks from minimal samples

arXiv

引用

arXiv 2021年

作者： Fiedler, Christian Fornasier, Massimo Klock, Timo Rauchensteiner, Michael Intelligent Control Systems Group Max Planck Institute for Intelligent Systems Heisenbergstr. 3 Stuttgart70569 Germany Institute for Data Science in Mechanical Engineering RWTH-Aachen University Dennewartstraße 27 Aachen50868 Germany Department of Mathematics Bolzmannstraße 3 85748 Garching Germany Department of Numerical Analysis and Scientific Computing Simula Research Laboratory Oslo Norway Department of Mathematics University of San Diego California San Diego United States

In this paper we approach the problem of unique and stable identifiability of generic deep artificial neural networks with pyramidal shape and smooth activation functions from a finite number of input-output samples. More specifically we introduce the so-called entangled weights, which compose weights of successive layers intertwined with suitable diagonal and invertible matrices depending on the activation functions and their shifts. We prove that entangled weights are completely and stably approximated by an efficient and robust algorithm as soon as O(D2 × m) nonadaptive input-output samples of the network are collected, where D is the input dimension and m is the number of neurons of the network. Moreover, we empirically observe that the approach applies to networks with up to O(D × mL) neurons, where mL is the number of output neurons at layer L. Provided knowledge of layer assignments of entangled weights and of remaining scaling and shift parameters, which may be further heuristically obtained by least squares, the entangled weights identify the network completely and uniquely. To highlight the relevance of the theoretical result of stable recovery of entangled weights, we present numerical experiments, which demonstrate that multilayered networks with generic weights can be robustly identified and therefore uniformly approximated by the presented algorithmic pipeline. In contrast backpropagation cannot generalize stably very well in this setting, being always limited by relatively large uniform error. In terms of practical impact, our study shows that we can relate input-output information uniquely and stably to network parameters, providing a form of explainability. Moreover, our method paves the way for compression of overparametrized networks and for the training of minimal complexity *** Codes 65D15, 68T07, 90C26 Copyright © 2021, The Authors. All rights reserved.

关键词： Deep neural networks

来源：评论

学校读者我要写书评

暂无评论

Compound Fuzzy Clustering Anomaly Detection Based on Production Process Coupling

Compound Fuzzy Clustering Anomaly Detection Based on Product...

引用

Chinese Automation Congress (CAC)

作者： Mengyao Fu Yangzhao Li Mengfan Zhang Dongqin Feng Qingyun Chen Ying Jiang College of Control Science and Engineering Zhejiang University Hangzhou China Operation Branch Company Shaoxing Rail Transit Group Co. Ltd Shaoxing China General Technology Research Center for Intergrated Electronic Systems Beijing Electro-Mechanical Engineering Institute Beijing China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

In recent years, the network security problem of industrial control systems is very severe. It is particularly important to detect abnormal situations in the industrial control system network correctly and timely to avoid disasters in the physical world. This paper proposes a compound fuzzy clustering algorithm, taking TE process as the research object, to analyze its working mechanism and distinguish security threats it may encounter. Considering the coupling relationship between the production process unit in the industrial control system, fuzzy clustering is used for each process unit, which performs detection and comprehensive decision-making to obtain the final anomaly detection result. Experimental results show that the proposed compound fuzzy clustering algorithm can realize anomaly detection in industrial control systems.

关键词： Inductors Particle separators Couplings Production Integrated circuits Anomaly detection Process control

来源：评论

学校读者我要写书评

暂无评论

Corrigendum: Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV (2023 Nucl. Fusion 63 026006)

引用

Nuclear Fusion 2023年第6期63卷 069501-069501页

作者： J.T.W. Koenders A. Perek B. Kool O. Février T. Ravensbergen C. Galperti B.P. Duval C. Theiler M. van Berkel the TCV Team the EUROfusion MST1 Team DIFFER—Dutch Institute for Fundamental Energy Research Eindhoven Netherlands Department of Mechanical Engineering Control Systems Technology Group Eindhoven University of Technology Eindhoven Netherlands École Polytechnique Fédérale de Lausanne (EPFL) Swiss Plasma Center (SPC) Lausanne Switzerland ITER Organization St. Paul Lez Durance Cedex France

In the published paper titled 'Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV' (2023 Nucl. Fusion63 026006), the legend of figure 5 shows the wrong colors: red ...

In the published paper titled 'Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV' (2023 Nucl. Fusion63 026006), the legend of figure 5 shows the wrong colors: red and blue are switched. This corrigendum provides the correct legend for figure 5.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A comparison study of PV (5MW) based on PVsyst program for evaluation productive energy to connect with the grid. Sudan case study 1

A comparison study of PV (5MW) based on PVsyst program for e...

引用

1st International Conference on Sustainable Renewable Energy systems and Applications, ICSRESA 2019

作者： Abdeen, Osman Mourad, Mordjaoui Salim, Haddad University of 20 Août 1955 Department of Electrical Engineering Skikda Algeria Lrpci Laboratory Lab Member-International Group of Control Systems University of 20 Août 1955 Department of Electrical Engineering Skikda Algeria Lrpci Laboratory University of 20 Août 1955 Department of Mechanical Engineering Skikda Algeria

ISBN: (纸本)9781728153568

In most Sudanese cities, instability in electricity supply is a growing problem, and this problem can be solved by using renewable energies, especially solar photovoltaic energy because Sudan receives abundant amounts of solar radiation throughout the year. Any two different cities do not receive the same sunlight at the same time, and this affects the production of the PV system, because the production of energy for solar panels directly related to the amount of radiation received in the project site. Therefore, it is very necessary to use a photovoltaic simulation tool to determine all the components and know the energy produced according to the geographical location. This paper study the productive energy from PV (5MW) to connect with the grid in ten different areas (Portsudan, Alobied, Omdurman, Atbara, Dongola, Madani, Elginina, Alnhood, Kadogli, Nyala) in Sudan, these areas were proposed by the Sudanese Hydro Generation and Renewable Company, General Administration of Renewable Energies, Solar Power Management. In order to know the productivity of the panel's if they are placed in these areas. The system was planned by using fixed tilt method to control the PV array in PVsyst program by using (Latitude, Longitude, Altitude, Time Zone) of all the ten areas. This paper has been focused of global incident in coll and available energy at inverter output. The Simulation results explain the best position of PV(5WM) between the ten areas Portsudan city. The PV system which has been selected in this area produces an annual energy of 8566750 KWh by global incident in coll 2283 KWh/m^2, it is the highest annual energy generated by the photovoltaic system. Cities were arranged according to their highest productivity. © 2019 IEEE.

关键词： Solar panels

来源：评论

学校读者我要写书评

暂无评论

Heterogeneous multi-agent resource allocation through multi-bidding with applications to precision agriculture⁎

Heterogeneous multi-agent resource allocation through multi-...

引用

作者： Cobbenhagen, A.T.J.R. Antunes, D.J. van de Molengraft, M.J.G. Heemels, W.P.M.H. Control Systems Technology group Dept. of Mechanical Engineering Eindhoven University of Technology Eindhoven Netherlands

In this paper we consider the problem of allocating multiple resources to a number of clients by a group of heterogeneous agents over time such that the clients can produce products while maximizing a profit function. We propose an approximate optimization framework in which every client provides multiple bids from which the agents choose such that an allocation is feasible and that the profit function is maximized over time. The proposed framework exploits decomposition techniques that can be used for large-scale multi-agent resource allocation problems in which the cost objective is additive, the dynamics of product generation is non-linear and the agents have different capabilities. Interestingly, the decomposition can be solved in a distributed fashion, enabling application to large-scale problems. We apply this decomposition to the management of resources and agents in precision agriculture as an inspirational and important application domain of the obtained results. We show that our framework can be used in order to schedule the time, location and quantity of resources that every agent must provide whilst optimizing the profit of the entire farm over the growing season. © 2018

关键词： Profitability

来源：评论

学校读者我要写书评

暂无评论

Linear parameter-varying control of nonlinear systems based on incremental stability

arXiv

引用

arXiv 2019年

作者： Koelewijn, P.J.W. Tóth, R. Nijmeijer, H. Control Systems Group Department of Electrical Engineering Eindhoven University of Technology Eindhoven5612 AE Netherlands Dynamics and Control Group Department of Mechanical Engineering Eindhoven University of Technology Eindhoven5612 AE Netherlands

The Linear Parameter-Varying (LPV) framework has long been used to guarantee performance and stability requirements of nonlinear (NL) systems mainly through the L2-gain concept. However, recent research has pointed out that current L2-gain based LPV synthesis methods can fail to guarantee these requirements if stabilization of a non-zero operating condition (e.g. reference tracking, constant disturbance rejection, etc.) is required. In this paper, an LPV based synthesis method is proposed which is able to guarantee incremental performance and stability of an NL system even with reference and disturbance rejection objectives. The developed approach and the current L2LPV synthesis method are compared in a simulation study of the position control problem of a Duffing oscillator, showing performance improvements of the proposed method compared to the current L2-based approach for tracking and disturbance rejection. Copyright © 2019, The Authors. All rights reserved.

关键词： Disturbance rejection

来源：评论

学校读者我要写书评

暂无评论

control of an Omnidirectional Mobile Base with Multiple Spherical Robots

Control of an Omnidirectional Mobile Base with Multiple Sphe...

引用

control Conference (ICC), 2019 Sixth Indian

作者： Vaibhav Nandkumar Kadam Leena Vachhani Abhishek Gupta Systems and Control Engineering Group Indian Institute of Technology Bombay Mumbai Maharashtra Mechanical Engineering Department Indian Institute of Technology Bombay Mumbai Maharashtra

ISBN: (数字)9781728138602

ISBN: (纸本)9781728138619

Mobile base with omnidirectional wheels have the advantage of unrestricted maneuverability. We investigate the use of spherical robots as omnidirectional wheels. A three link assembly with snap joint for each robot is designed. Each robot is independently actuated. In order for the three robots to coordinate for mobile robot, the kinematic model for orienting and commanding the velocities of these actuation is developed. Experiments are performed with PI controller for demonstrating the applications of developed mobile base with three spherical robots. With the experimental results on waypoint navigation and circular path following, the mobile base is shown to have unrestricted maneuverability in all the directions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：