检索结果-内蒙古大学图书馆

Asian control Conference

作者： Yingying Pang Zhenyi Liu Haibin Guo Yong Zheng Zhonghua Pang Shengnan Gao Department of Automation North China University of Technology Beijing China School of Control and Computer Engineering Noth China Electric Power University Beijing China

ISBN: (数字)9789887581598

ISBN: (纸本)9798331540845

This paper addresses the output tracking problem of network control systems (NCSs) with random communication constraints, especially when the lower bound of the time delay induced by random communication constraints is relatively large. Firstly, the output tracking problem is converted into the stabilization problem of an augmented system. Then, a networked predictive output tracking control scheme with time-varying control gains is proposed to compensate for the impact of the communication constraints so as to complete the desired output tracking performance under the large time delays. And, a set of control gains are calculated for each different time delay, which improves the adaptability of NCSs to time delays. Next, a sufficient condition is derived to keep the system stability. Finally, the effectiveness of the proposed method is verified by numerical simulations.

关键词： Sufficient conditions Networked control systems Delay effects Numerical simulation Stability analysis Real-time systems Delays

来源：评论

学校读者我要写书评

暂无评论

Safe Path Following control of Autonomous Underwater Vehicles Based on Double Dipole Vector Field 14

Safe Path Following Control of Autonomous Underwater Vehicle...

引用

14th Asian control Conference, ASCC 2024

作者： Wang, Haoliang Li, Tan Muriatoy, Lootha Loserian Yu, Dezhi Liu, Pingxin Jichong, Ai Lu, Daoyi Marine Engineering College Dalian Maritime University Dalian China Department of Automation Shanghai Jiaotong University Shanghai China State Key Laboratory of Maritime Technology and Safety Dalian China Dalian Key Laboratory of Swarm Control and Electrical Technology for Intelligent Ships Dalian China Marine Electrical Engineering College Dalian Maritime University Dalian China Hainan Railway Co. Ltd Haikou China

ISBN: (纸本)9789887581598

This paper studies a path following problem of autonomous underwater vehicle (AUV) in complex and harsh working environment. Firstly, a kinematic model of an AUV in the vertical plane is built by constructing an earth coordinate system and a body coordinate system. Secondly, a guidance pitch angle is proposed by using a double dipole vector field, and guidance speeds are designed based on the back-stepping method. Finally, the stability of the proposed control system is proved by Lyapunov stability theory. Simulation results verify the effectiveness of the real-time safe path following control of autonomous underwater vehicles based on double dipole vector field. © 2024 Asian control Association.

关键词： Autonomous underwater vehicles

来源：评论

学校读者我要写书评

暂无评论

Stochastic process-based degradation modeling and RUL prediction: from Brownian motion to fractional Brownian motion

引用

Science China(Information Sciences) 2021年第7期64卷 5-24页

作者： Hanwen ZHANG Maoyin CHEN Jun SHANG Chunjie YANG Youxian SUN School of Automation and Electrical Engineering University of Science and Technology Beijing State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang University Department of Automation Tsinghua University School of Automation and Electrical Engineering Linyi University Department of Electrical and Computer Engineering University of Alberta

Brownian motion(BM) has been widely used for degradation modeling and remaining useful life(RUL) prediction, but it is essentially Markovian. This implies that the future state in a BM-based degradation process relies only on its current state, independent of the past states. However, some practical industrial devices such as Li-ion batteries, ball bearings, turbofans, and blast furnace walls show degradations with long-range dependence(LRD), where the future degradation states depend on both the current and past degradation states. This type of degradation naturally brings two interesting problems, that is, how to model the degradations and how to predict their RULs. Recently, in contrast to the work that uses only BM, fractional Brownian motion(FBM) is introduced to model practical degradations. The most important feature of the FBM-based degradation models is the ability to characterize the non-Markovian degradations with LRD. Although FBM is an extension of BM, it is neither a Markovian process nor a semimartingale. Therefore, how to obtain the first passage time of an FBM-based degradation process has become a challenging task. In this paper, a review of the transition of RUL prediction from BM to FBM is provided. The peculiarities of FBM when addressing the LRD inherent in some practical degradations are discussed. We first review the BM-based degradation models of the past few decades and then give details regarding the evolution of FBM-based research. Interestingly, the existing BM-based models scarcely consider the effect of LRD on the prediction of RULs. Two practical cases illustrate that the newly developed FBMbased models are more generalized and suitable for predicting RULs than the BM-based models, especially for degradations with LRD. Along with the direction of FBM-based RUL prediction, we also introduce some important and interesting problems that require further study.

关键词： remaining useful life degradation model Brownian motion fractional Brownian motion long-range dependence

来源：评论

学校读者我要写书评

暂无评论

Multi-Scale Attention Semi-Supervised Network Based on Confidence Iteration and Pseudo-Label Optimization for COVID-19 CT Segmentation 42

Multi-Scale Attention Semi-Supervised Network Based on Confi...

引用

42nd Chinese control Conference, CCC 2023

作者： Liu, Kun Chen, Mei Xie, Junfei Mao, JingKun Liu, WeiPeng School of Artificial Intelligence and Data Science Hebei University of Technology Tianjin300130 China Tianjin University of Technology Department of Automation Tianjin300384 China Hebei University of Technology Control Engineering Technology Innovation Center of Hebei Province Tianjin300401 China

ISBN: (纸本)9789887581543

Computed tomography (CT) image segmentation for COVID-19 lung infection has made great progress. However, accurate segmentation remains a major challenge due to the varying shape and size of COVID-19 infected areas, the more similar tissue of infected lung images to normal lung images, and the additional problem of a limited number of medical images annotated at the pixel level. In this paper, we propose a semi-supervised segmentation network based on confidence iteration and pseudo-label optimization for COVID-19 CT segmentation. In addition, we develop a multi-scale attention module which can achieve attentional feature fusion at different scales. The experiment evaluated on the COVID-19 CT Segmentation dataset, demonstrate our method achieves higher segmentation accuracy than the state-of-art methods. © 2023 Technical Committee on control Theory, Chinese Association of automation.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

LiDAR-Inertial-Encoder Fusion for Real-Time Simultaneous Localization and Mapping of Rubber Tire Gantry Cranes

LiDAR-Inertial-Encoder Fusion for Real-Time Simultaneous Loc...

引用

第43届中国控制会议

作者： Wangchao Yu Jun Yang Jinya Su School of Automation Southeast University Key Laboratory of Measurement and Control of CSE Ministry of Education Southeast University Department of Aeronautical and Automotive Engineering Loughborough University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

Simultaneous Localization and Mapping(SLAM) plays a vital role in ensuring port safety and efficiency by augmenting accurate, robust, and real-time perception. SLAM has been widely applied in automated guided vehicles in ports, there is still limited exploration into rubber tire gantry(RTG) crane applications. To address this gap, this paper introduces a robust SLAM framework for RTGs, leveraging a tightly coupled Iterated Error-State Kalman Filter to integrate multiple solid-state LiDARs with IMU and encoder measurements. The proposed approach, mainly encompassing preprocessing for sensor synchronization and a novel feature point based on LiDAR point cloud intensity, can significantly enhance system robustness. During prediction,the IMU first infers the system's state and de-skews the LiDAR point cloud with an initial estimate, which is then optimized using Li DAR observations in the update stage. Tested on extensive self-collected port datasets against the SOTA FAST-LIO2,the proposed method achieves considerable accuracy and robustness in RTG applications.

关键词： SLAM Multi-LiDARs Multi-sensor fusion Rubber Tire Gantry Cranes

来源：评论

学校读者我要写书评

暂无评论

Individual pitch controller with static inverted decoupling for periodic blade load reduction on monopile offshore wind turbines

引用

Ocean engineering 2025年 334卷

作者： Lara, Manuel Ruz, Mario L. Mulders, Sebastiaan Paul Vázquez, Francisco Garrido, Juan Department of Electrical Engineering and Automation University of Cordoba Campus of Rabanales Cordoba14071 Spain Department of Mechanics University of Cordoba Campus of Rabanales Cordoba14071 Spain Delft Center for Systems and Control Faculty of Mechanical Engineering Delft University of Technology Mekelweg 2 Delft2628 CD Netherlands

Individual pitch control (IPC) is a technique used to reduce periodic blade loads in wind turbines. It generally uses the multiblade coordinate transformation to convert blade load measurements from a rotating frame into a two-axes non-rotating frame. Although these non-rotating axes are assumed to be decoupled, studies reveal persistent interactions. Reducing this coupling, such as by introducing an azimuth offset, enhances IPC performance. This study explores the impact of static inverted decoupling, which decouples the process in the steady state, on IPC performance. The proposed IPCs are adaptive, scheduling controller and decoupling gains based on operational conditions. In such IPC designs, the integral gains of the diagonal controllers and the decoupling elements can either be the same or different. These methods were validated on a simulated 15 MW wind turbine. controller parameter optimization was accomplished through genetic algorithms to minimize blade fatigue loads, measured via the damage equivalent load (DEL). Results indicate that incorporating static inverted decoupling into IPC improves blade load reduction without increasing pitch actuator effort. IPCs with similar integral gains and matching absolute values in decoupling elements achieved the best balance between DEL reduction and complexity with minimal actuator effort, while additional optimization parameters provided negligible improvements. © 2025 Elsevier Ltd

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Adaptive gain-scheduling control for uncertain Markovian jump systems. A transition rate synthesis method 37

Adaptive gain-scheduling control for uncertain Markovian jum...

引用

37th Youth Academic Annual Conference of Chinese Association of automation, YAC 2022

作者： Cao, Zhiru Zhu, Kaiqun Zhang, Zhina East China University of Science and Technology School of Information Science and Engineering China Shanghai University School of Mechatronic Engineering and Automation Shanghai China University of Shanghai for Science and Technology Department of Control Science and Engineering Shanghai China Anhui Polytechnic University School of Mathematics-Physics and Finance Wuhu China

ISBN: (纸本)9781665465366

This paper is concerned with the gain-scheduling control for a class of uncertain Markovian jump systems, in which the uncertainties are described via the polytopic representation. In order to reduce the conservatism brought from the common/parameter-independent control method in existing results, an adaptive gain-scheduling controller is designed whose gain is constructed as a convex sum of a fixed set of controller gains. Under the assumption of a given transition rate matrix, the controller gains and adaption laws of polytopic parameters are co-designed to ensure the stochastic stability of the resultant closed-loop system. Furthermore, taking the characteristic of Markovian transition rates, a co-designed scheme is developed to obtain controller gains, transition rate matrix, and adaption laws, simultaneously. Finally, a numerical example is adopted to illustrate the proposed method. © 2022 IEEE.

关键词： Closed loop systems

来源：评论

学校读者我要写书评

暂无评论

A Derivative-free Kalman Filter-based Disturbance Observer using Flat Inputs

A Derivative-free Kalman Filter-based Disturbance Observer u...

引用

IEEE International Conference on Automatica (ICA-ACCA)

作者： José Oniram de A. Limaverde Filho Matheus T. de Sousa Anderson B. Rodrigues Eugênio Fortaleza Department of Electrical Engineering University of Brasília Brasília Brazil Automation and Control Group (GRACO) University of Brasília Brasília Brazil

ISBN: (数字)9798350378115

ISBN: (纸本)9798350378122

Differential flatness theory has proven useful in providing efficient solutions to advanced control and state estimation problems. However, its application to differentially flat systems whose flat output vector is not directly measurable may face practical limitations. Recently, the concept of flat inputs has emerged as a promising approach to overcome these constraints. Nevertheless, to the best of our knowledge, existing studies with flat inputs have not considered the presence of unknown external disturbances in controller design. To address this gap, this paper proposes a derivative-free Kalman filter-based disturbance observer using flat inputs for differentially flat nonlinear systems with stable internal dynamics where the flat output vector is not a measurable variable. The effectiveness of the proposed scheme is numerically verified for the well-known quadruple-tank process.

关键词： Simulation Noise Process control Vectors Filtering theory Disturbance observers Trajectory Nonlinear dynamical systems Kalman filters State estimation

来源：评论

学校读者我要写书评

暂无评论

Impact of Augmented Reality on the Teaching of Anatomy: A Study in Health Sciences Students

Impact of Augmented Reality on the Teaching of Anatomy: A St...

引用

IEEE ANDESCON

作者： Angel Julian Burgos Víctor Hugo Mosquera Industrial Automation Engineering Universidad del Cauca Popayán Colombia Electronic Instrumentation and Control Department Universidad del Cauca Popayán Colombia

ISBN: (数字)9798350355284

ISBN: (纸本)9798350355291

In the domain of health sciences education, the integration of innovative educational technologies is indispensable for enhancing the comprehension of anatomical concepts. This study explores the impact of Augmented Reality (AR) on anatomy education, specifically focusing on the upper limb. The aim is to assess how AR influences learning outcomes, student engagement, and motivation. Forty-two students from the Faculty of Health Sciences at the University of Cauca actively participated in the study. The findings reveal a significant preference for frequent utilization of educational technologies among the participants, showcasing a high level of technological integration in their learning practices. The tool's ease of use and its substantial impact on improving the understanding of upper limb anatomy received positive feedback, with an average rating of 4.5 on a scale of 0 from 5. This study demonstrates that AR, when implemented in anatomy education for health sciences students, not only improves understanding but also fosters motivation and engagement. These results underscore the potential of AR as a transformative tool in health sciences education, offering an immersive and interactive learning experience that aligns with the preferences and needs of actual generation learners.

关键词： Training Visualization Technological innovation Adaptation models Refining Focusing Educational technology Medical services Anatomy Augmented reality

来源：评论

学校读者我要写书评

暂无评论

Multi-Channel Based on Attention Network for Infrared Small Target Detection

引用

Journal of Shanghai Jiaotong university(Science) 2024年第3期29卷 414-427页

作者：张彦军王碧云蔡云泽 Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Aerospace Control Technology Shanghai 201109China Infrared Detection Technology R&D Center of China Aerospace Science and Technology Corporation Shanghai 201109China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai 200240China Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China

Infrared detection technology has the advantages of all-weather detection and good concealment,which is widely used in long-distance target detection and tracking ***,the complex background,the strong noise,and the characteristics of small scale and weak intensity of targets bring great difficulties to the detection of infrared small targets.A multi-channel based on attention network is proposed in this paper,aimed at the problem of high missed detection rate and false alarm rate of traditional algorithms and the problem of large model,high complexity and poor detection performance of deep learning ***,given the difficulty in extracting the features of infrared multiscale and small dim targets,the multiple channels are designed based on dilated convolution to capture multiscale target ***,the coordinate attention block is incorporated in each channel to suppress background clutters adaptively and enhance target *** addition,the fusion of shallow detail features and deep abstract semantic features is realized by synthesizing the contextual attention fusion ***,it is verified that,compared with other state-of-the-art methods based on the datasets SIRST and MDFA,the proposed algorithm further improves the detection effect,and the model size and computational complexity are smaller.

关键词： infrared image small target detection deep learning attention mechanism feature fusion

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：