检索结果-内蒙古大学图书馆

Human-Computer Interaction, Optimization and Robotic Applications (HORA), International Congress on

作者： Aydoğan Soylu Tufan Kumbasar Control and Automation Engineering Department Istanbul Technical University Istanbul Turkey AI and Intelligent Systems Laboratory Istanbul Technical University Istanbul Turkey

ISBN: (数字)9798331510886

ISBN: (纸本)9798331510893

Accurate modeling of aerodynamic coefficients is crucial for understanding and optimizing the performance of modern aircraft systems. This paper presents the novel deployment of an Evolving Type-2 Quantum Fuzzy Neural Network (eT2QFNN) for modeling the aerodynamic coefficients of the ATTAS aircraft to express the aerodynamic characteristics. eT2QFNN can represent the nonlinear aircraft model by creating multiple linear submodels with its rule-based structure through an incremental learning strategy rather than a traditional batch learning approach. Moreover, it enhances robustness to uncertainties and data noise through its quantum membership functions, as well as its automatic rule-learning and parameter-tuning capabilities. During the estimation of the aerodynamic coefficients via the flight data of the ATTAS, two different studies are conducted in the training phase: one with a large amount of data and the other with a limited amount of data. The results show that the modeling performance of the eT2QFNN is superior in comparison to baseline counterparts. Furthermore, eT2QFNN estimated the aerodynamic model with fewer rules compared to Type-1 fuzzy counterparts. In addition, by applying the Delta method to the proposed approach, the stability and control derivatives of the aircraft are analyzed. The results prove the superiority of the proposed eT2QFNN in representing aerodynamic coefficients.

关键词： Training Uncertainty Atmospheric modeling Aerodynamics Fuzzy neural networks Stability analysis Robustness Aircraft Robots Optimization

来源：评论

学校读者我要写书评

暂无评论

Dynamic Performance Prediction in Batch-Based Assembly System with Bernoulli Machines and Changeovers

引用

Complex System Modeling and Simulation 2022年第3期2卷 224-237页

作者： Zunjun Wang Zhiyang Jia Xiuxuan Tian Jingchuan Chen Bei Pan State Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of TechnologyBeijing 100081China Department of Industrial and Manufacturing Systems Engineering University of Hong KongHong Kong 999077China School of Engineering Tokyo University of TechnologyTokyo 192-0982Japan

Worldwide competition and diverse demand of customers pose great challenges to manufacturing enterprises. How to organize production to achieve high productivity and low cost becomes their primary task. In the mean time, the rapid pace of technology innovation has contributed to the development of new types of flexible automation. Hence, increasing manufacturing enterprises convert to multi-product and small-batch production, a manufacturing strategy that brings increased output, reduced costs, and quick response to the market. A distinctive feature of small-batch production is that the system operates mainly in the transient states. Transient states may have a significant impact on manufacturing systems. It is therefore necessary to estimate the dynamic performance of systems. As the assembly system is a typical class of production systems, in this paper, we focus on the problem of dynamic performance prediction of the assembly systems that produce small batches of different types of products. And the system is assumed to be characterized with Bernoulli reliability machines, finite buffers, and changeovers. A mathematical model based on Markovian analysis is first derived and then, the analytical formulas for performance evaluation of three-machine assembly systems are given. Moreover, a novel approach based on decomposition and aggregation is proposed to predict dynamic performance of large-scale assembly systems that consist of multiple component lines and additional processing machines located downstream of the assemble machine. The proposed approach is validated to be highly accurate and computationally efficient when compared to Monte Carlo simulation.

关键词： flexible assembly system dynamic performance Bernoulli machines finite buffers changeovers

来源：评论

学校读者我要写书评

暂无评论

EFEAR-4D: Ego-Velocity Filtering for Efficient and Accurate 4D radar Odometry

arXiv

引用

arXiv 2024年

作者： Wu, Xiaoyi Chen, Yushuai Li, Zhan Hong, Ziyang Hu, Liang The Department of Automation School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen518055 China Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin150001 China

Odometry is a crucial component for successfully implementing autonomous navigation, relying on sensors such as cameras, LiDARs and IMUs. However, these sensors may encounter challenges in extreme weather conditions, such as snowfall and fog. The emergence of FMCW radar technology offers the potential for robust perception in adverse conditions. As the latest generation of FWCW radars, the 4D mmWave radar provides point cloud with range, azimuth, elevation, and Doppler velocity information, despite inherent sparsity and noises in the point cloud. In this paper, we propose EFEAR-4D, an accurate, highly efficient, and learning-free method for large-scale 4D radar odometry estimation. EFEAR-4D exploits Doppler velocity information delicately for robust ego-velocity estimation, resulting in a highly accurate prior guess. EFEAR-4D maintains robustness against point-cloud sparsity and noises across diverse environments through dynamic object removal and effective region-wise feature extraction. Extensive experiments on two publicly available 4D radar datasets demonstrate state-of-the-art reliability and localization accuracy of EFEAR-4D under various conditions. Furthermore, we have collected a dataset following the same route but varying installation heights of the 4D radar, emphasizing the significant impact of radar height on point cloud quality - a crucial consideration for real-world deployments. Our algorithm and dataset will be available soon at https://***/CLASS-Lab/EFEAR-4D. © 2024, CC BY-NC-SA.

关键词： Millimeter waves

来源：评论

学校读者我要写书评

暂无评论

Variable Frequency Phase-Shift Modulation Technique for Single Stage Dual-Active-Bridge AC-DC Converter 11

Variable Frequency Phase-Shift Modulation Technique for Sing...

引用

11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Guo, Dongxin Wang, Panbao Ren, Chunguang Guerrero, Josep M. Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China Taiyuan University of Technology Shanxi Key Lab. of Power System Operation and Control Taiyuan China Aalborg University Department of Energy Technology Aalborg Denmark

ISBN: (纸本)9788957083505

This article proposes a variable frequency phase-shift modulation technique for single stage dual-active-bridge (DAB) AC-DC converter. This isolated single-stage single-phase converter consists of a DAB and a full bridge (FB) inverter. The proposed strategy applies a composite control strategy combining frequency modulation and extended phase shift (EPS) method to overcome the drawback of the non-linear power control of traditional phase-shift control scheme, which significantly reduces the complexity of the controller algorithm. Moreover, the synchronous inverter control applied to the back-end FB inverter is designed, which can realize the energy conversions in a single-stage, and a high frequency (HF) filter capacitor can replace the electrolytic capacitor at the output side DC-link. Thus, the safety of system operation improves and the power density of the system increases. Finally, simulation results confirm the validity and practical feasibility of the proposed control strategy. © 2023 The Korean Institute of Power Electronics.

关键词： Electrolytic capacitors

来源：评论

学校读者我要写书评

暂无评论

Active control of Pantograph Sliding Mode Under Fluctuating Wind Excitation 6th

Active Control of Pantograph Sliding Mode Under Fluctuating ...

引用

6th International Conference on Electrical engineering and Information Technologies for Rail Transportation, EITRT 2023

作者： Ren, Zedong Wang, Ying Mu, Xiuqing Chen, Xiaoqiang Chang, Zhanning School of Automation and Electrical Engineering Lanzhou Jiaotong University Lanzhou730070 China Key Laboratory of Optoelectronic Technology and Intelligent Control Ministry of Education Lanzhou730070 China China Railway Lanzhou Bureau Group Co Ltd. Power Supply Department Lanzhou730070 China

ISBN: (纸本)9789819993185

Considering the effects of fluctuating wind excitation on the dynamic performance of the pantograph-catenary coupling system, the ideal contact force between the pantograph and the catenary is taken as the control target, and the control of the pantograph is achieved through an actuator. Firstly, based on the three-mass block pantograph model, a pantograph-catenary coupling model is established for control purposes. Then, the equivalent vibration force on the contact line caused by the fluctuating wind excitation is derived, and the model of the pantograph-catenary system under fluctuating wind excitation is modified. Finally, a sliding-mode control method is adopted to design the pantograph active controller. The results indicate that the designed sliding mode controller is capable of suppressing the vibrations of the pantograph-contact wire system, thereby improving the quality of current collection. © 2024, Beijing Paike Culture Commu. Co., Ltd.

关键词： Sliding mode control

来源：评论

学校读者我要写书评

暂无评论

Multi-Objective Optimization of Individual Pitch control for Blade Fatigue Load Reductions for a 15 MW Wind Turbine

Multi-Objective Optimization of Individual Pitch Control for...

引用

European control Conference (ECC)

作者： Manuel Lara Francisco Vázquez Jan-Willem van Wingerden Sebastiaan Paul Mulders Juan Garrido Department of Electrical Engineering and Automation University of Cordoba Cordoba Spain Delft Center for Systems and Control Faculty of Mechanical Engineering Delft University of Technology Delft The Netherlands

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

In order to mitigate periodic blade loads in wind turbines, recent research has analyzed different Individual Pitch control (IPC) approaches, which typically use the multi-blade coordinate (MBC) transformation. Some of these studies show that the introduction of an additional tuning parameter in the MBC, namely the azimuth offset, helps to decouple the nonrotating axes in the MBC transformation and enhances the IPC performance. However, these improvements have been studied without considering the increased control effort performed by the pitch signal, which is the main negative side effect of the IPC. This work addresses this trade-off between pitch signal effort and blade fatigue reduction for IPC applied to a wind turbine operating in the full load region. Here, two IPC schemes, with and without additional azimuth offset, are designed and applied to a 15 MW monopile offshore wind turbine simulated with OpenFAST software. The optimal tuning of the IPC parameters is performed by means of a multi-objective optimization solved by genetic algorithms. The optimization procedure minimizes two objective functions related to pitch signal effort and blade fatigue load. The resulting Pareto fronts show a range of optimal solutions for each IPC scheme. The selected optimal solution for IPC with azimuth offset compared to the optimal solution for IPC without offset achieves improvements of more than 10% in blade load reduction maintaining similar pitch signal effort.

关键词： Azimuth Blades Simulation Fatigue Linear programming Software Wind turbines

来源：评论

学校读者我要写书评

暂无评论

3D Gyroscope Wi-Fi for Robot Application with Modbus

3D Gyroscope Wi-Fi for Robot Application with Modbus

引用

International Conference on control, automation and Systems ( ICCAS)

作者： Anan Wongjan Rujipan Kosarat Department of Electronic Engineering and Automation Control System Faculty of Engineering Rajamangala University of Technology Lanna Chiang Mai Thailand Department of Software Engineering Faculty of Engineering Rajamangala University of Technology Lanna Chiang Mai Thailand

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

This article aims to propose an algorithm for operating a robot gyroscope application. A gyroscope, an instrument for measuring and maintaining direction, utilizes the concept of angular momentum. The hardware architecture utilizes the GY-85 sensor modules, the ESP-32, and the OLED to accomplish communication with other linked devices. I will refer to it as the 3D gyroscope. It is possible for this gadget to function in conjunction with any kind of gyroscope or robot of any kind. For determining the values of acceleration and gravity, the application makes use of the x, y, and z axes. To communication between the devices, the algorithm makes use of the Modbus protocol for communication between the devices. You can use LabView to develop a testable gyroscope application. We rotated the constructed three-dimensional gyroscope at angles of 0 degrees, 45 degrees, and -45 degrees along the x, y, and z axes to test the results. The rotating process produced a multi-perspective, three-dimensional presentation of the constructed or developed device. Theta values in the x, y, and z axes that come from the experimental findings for angles of 45, -45, and 0 are extremely accurate.

关键词： Three-dimensional displays Protocols Instruments Organic light emitting diodes Robot sensing systems control systems Hardware Gyroscopes Wireless fidelity Gravity

来源：评论

学校读者我要写书评

暂无评论

A Hardware-Efficient Vector Limiter Algorithm and Its Programmable Logic Realization

A Hardware-Efficient Vector Limiter Algorithm and Its Progra...

引用

China International Electrical and Energy Conference (CIEEC)

作者： Zhao Song Yiyan Wang Tianyi Xiong Computer and Electronics System and Engineering Department AVIC Xi'an Flight Automation Control Research Institute (FACRI) Xi'an Shanxi Province China

ISBN: (数字)9798350359558

ISBN: (纸本)9798350359565

Vector limiter is a computationally complex component of vector control, but its hardware-friendly algorithm is rarely discussed. This paper presents an efficient solution with pure shift-and-add operations, namely the dual vector rotation algorithm (DVRA). Its programmable logic realization is also provided. The DVRA is then simulated in a motor driving system, and physical validation is made on a Xilinx FPGA. Furthermore, performance comparison is conducted between the DVRA and four control groups (conventional algorithms). All control groups are built by Xilinx IPs under diversified configurations, thus human bias can be minimized. Post-implementation results evince that the DVRA exhibits significantly less resource expenditure and better timing, with power consumption and accuracy comparable to the control groups.

关键词： Power demand Accuracy Motors Vectors Hardware Timing System-on-chip

来源：评论

学校读者我要写书评

暂无评论

Investigation of a Simulated Robot Model when it is Trained to Set Trajectories in the Task of controlling Assembly Parameters at Remote Visualization

Investigation of a Simulated Robot Model when it is Trained ...

引用

2022 International Russian automation Conference, RusAutoCon 2022

作者： Malkarov, A.Yu. Arkhipov, M.V. Kocherevskaya, L.B. Moscow Polytechnic University Faculty of Mechanical Engineering Department of Automation and Control Moscow Russia Moscow Aviation Institute National Research University Foreign Language Department for Aerospase Specialities Moscow Russia

ISBN: (数字)9781665466554

ISBN: (纸本)9781665466554

The science of robotics is becoming more and more relevant for industrial production. Visualization of the production system involves the exact modeling of its components as accurately as possible. For a robotic technological complex, such a main component is an industrial robot. The robot model should most accurately reflect what is happening in real production, since the robot is the basis of robotic production. Modeling allows you to perform a comprehensive analysis of the production system without direct design and start-up and, if possible, easily redesign it. An application was developed for building a virtual model of the robot and the workspace. An analysis of the behavior of the manipulator makes it possible to consistently improve the accuracy of modeling and the efficiency of designing a robotic technological complex. © 2022 IEEE.

关键词： Visualization

来源：评论

学校读者我要写书评

暂无评论

A Fast and Precise Multi-Level Global Registration Method for 3d Point Clouds

SSRN

引用

SSRN 2024年

作者： Ervan, Osman Temeltas, Hakan Department of Control and Automation Engineering Faculty of Electric and Electronics Istanbul Technical University Ayazaga Campus Sariyer Istanbul Maslak34469 Turkey

Three-dimensional (3D) point cloud registration is a fundamental process in the fields of computer vision and robotics. It enables the alignment and fusion of multiple point cloud datasets acquired from diverse viewpoints or distinct temporal instances. The rapid progress of 3D sensing technologies in 3D LiDAR sensors has led to the widespread availability of point cloud data across various applications, including robotics, autonomous navigation, object recognition, and cultural heritage preservation. Nevertheless, the inherent presence of noise, occlusions, and varying scales within acquired point clouds presents significant challenges in achieving precise registration. In this paper, we proposed a Multi-Level Global Registration algorithm, referred to as MULEG. Geometric features of the points have been extracted using eigenvalue and eigenvector-based multi-level similarity metrics. During pairwise registrations, changing the input point cloud between source and target can impact the registration performance. To address this issue, we introduced a correspondence intersection search mechanism, which effectively overcomes this problem. The similarity percentage metric calculation procedure generates the probability of two correspondence pairs being an exact match. These robust tools enhance the quality of the coarse registration, not only in terms of accuracy but also in terms of time consumption. Finally, the results of the coarse registration are updated in the fine registration step, completing the coarse-to-fine registration pipeline. The contribution of this proposed method lies in the enhancement of coarse registration accuracy, coupled with a reduction in the time required for fine registration. Comprehensive experimentation confirms that the proposed algorithm yields favorable outcomes, encompassing a high rate of successful registration, precise rotation estimation, accurate translation estimation, efficient runtime, and notably, surpasses the capabilities

关键词： Nearest neighbor search

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：