检索结果-内蒙古大学图书馆

Investigation of a GER damper using the Cut submode for vibration suppression in rotor systems with transmission shafts

引用

Science China(Technological Sciences) 2025年第5期68卷 74-86页

作者： Xijun CAO Jinglei ZHAO Zhi SUN Huajun CAO Xiaoxu HUANG Jun LUO Huayan PU The State Key Laboratory of Mechanical Transmission for Advanced Equipments Chongqing UniversityChongqing 400044China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Mechatronics Engineering and Automation Shanghai UniversityShanghai 200444China

Electrorheological(ER)and magnetorheological(MR)dampers,which are active damping devices,stand out for their exceptional performance in mitigating vibrations in mechanical systems and construction *** prowess lies in the inherent ability of ER/MR fluids to change their mechanical properties,particularly viscosity and shear stress,in response to the influence of electric or magnetic *** this study,a damper filled with Giant-ER(GER)fluid,a modified product of ER fluid,is employed in the rotor system for vibration *** damper operates in a Cut submode derived from the conventional working *** mode results in an effective enhancement of the damping performance by integrating the advantages of these modes,thereby achieving a damping force density of 1.2×10^(4) N/m^(2) and a modulation coefficient of 15 within a multilayered cylindrical ***,the dynamics of the rotor system are modeled and analyzed based on the Jeffcott rotor model,which incorporates a parallelogram-structured motion decoupling mechanism equipped with the proposed Cut submode dampers that are introduced to reduce the vibration of the transmission shaft in the rotor ***,to evaluate the damping effect,a vibration-damping performance validation testbed is *** results are noteworthy,demonstrating that by leveraging the superior properties of the GER fluid,the Cut submode damper effectively suppresses the vibrations of the transmission shaft,particularly at the resonant frequencies,achieving an impressive 88.9%reduction when subjected to an electric field of 3 kV/mm compared to the action of 0 kV/*** performance highlights the exceptional effectiveness of the proposed Cut submode,underscoring its vast potential for various engineering applications.

关键词： transmission shaft vibration suppression giant electrorheological fluid fluid damper Cut submode

来源：评论

学校读者我要写书评

暂无评论

Dissipative Consensus via ILC of Singular Multiagent Systems 13

Dissipative Consensus via ILC of Singular Multiagent Systems

引用

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

作者： Zhang, Meiyu Tian, Senping Gu, Panpan Li, Xiangyang School of Automation Science and Engineering South China University of Technology Guangzhou510641 China School of Electrical Engineering and Automation Hefei University of Technology Hefei230009 China

ISBN: (纸本)9798350361674

In this paper, the problem of dissipative consensus iterative learning control (ILC) is studied for singular multiagent systems (MASs). Firstly, a novel ILC algorithm is designed for such singular MASs. Then, under a connected communication graph, a sufficient condition is presented to make dissipative singular MASs abtain precise consensus tracking within a certain time interval. Finally, a simulation is conducted to validate the effectiveness of the proposed method. © 2024 IEEE.

关键词： Adversarial machine learning

来源：评论

学校读者我要写书评

暂无评论

Autonomous embodied navigation task generation from natural language dialogues

引用

Science China(Information Sciences) 2025年第5期68卷 119-132页

作者： Haifeng XU Yongchang LI Lumeng MA Chunwen LI Yanzhi DONG Xiaohu YUAN Huaping LIU Department of Automation Tsinghua University School of Physics and Electronic Information Yantai University School of Electrical and Electronic Engineering Shanghai Institute of Technology Department of Computer Science and Technology Tsinghua University

Robots are increasingly being deployed in densely populated environments, such as homes, hotels, and office buildings, where they rely on explicit instructions from humans to perform tasks. However, complex tasks often require multiple instructions and prolonged monitoring, which can be time-consuming and demanding for users. Despite this, there is limited research on enabling robots to autonomously generate tasks based on real-life scenarios. Advanced intelligence necessitates robots to autonomously observe and analyze their environment and then generate tasks autonomously to fulfill human requirements without explicit commands. To address this gap, we propose the autonomous generation of navigation tasks using natural language dialogues. Specifically, a robot autonomously generates tasks by analyzing dialogues involving multiple persons in a real office environment to facilitate the completion of item transportation between various *** propose the leveraging of a large language model(LLM) through chain-of-thought prompting to generate a navigation sequence for a robot from dialogues. We also construct a benchmark dataset consisting of 625 multiperson dialogues using the generation capability of LLMs. Evaluation results and real-world experiments in an office building demonstrate the effectiveness of the proposed method.

关键词： proactive robot robot navigation service robot large language model

来源：评论

学校读者我要写书评

暂无评论

Domination Control of Heterogeneous Uncertain Multi-agent Systems with Sensor Faults under Directed Communication Graphs 7

Domination Control of Heterogeneous Uncertain Multi-agent Sy...

引用

7th International Symposium on Autonomous Systems, ISAS 2024

作者： Liu, Zongcheng Huang, Jiangshuai Li, Qiuni Chen, Yong Han, Chongchong Aviation Engineering School of Air Force Engineering University Xi'an China Chongqing University School of Automation Chongqing China

ISBN: (纸本)9798350363173

Distributed control for heterogeneous multi-agent systems (MAS) under senor faults and time-varying control coefficients with directed communication graphs is investigated. Firstly, a novel type of functions named domination functions is introduced, and the global boundedness of MAS with time-varying control coefficients under directed communication graphs is achieved. Secondly, in view of domination function-based distributed controller, the problem of MAS with sensor faults is solved by simple distributed controllers in the sense that no time derivatives of system states or nonlinearities are involved in the controller. Thirdly, a guideline is provided for designing domination functions such that the system nonlinearities and their bound functions are allowed to be unknown. © 2024 IEEE.

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

A Structure and Design Method for Magnetic Integration of Current-Fed Dual Active Bridge DC-DC Converters

引用

IEEE Transactions on Power Electronics 2025年第8期40卷 10594-10608页

作者： Guo, Zhiqiang Yang, Hongkun Cao, Guoen Beijing Institute of Technology School of Automation Beijing100081 China North China University of Technology School of Energy Storage Science and Engineering Beijing100144 China

In this article, a structure and design method for magnetic integration are proposed for current-fed dual active bridge (DAB) dc-dc converters. To ensure maximum power transmission and achieve zero-voltage switching (ZVS), the operating modes are reviewed. Based on these modes, the series inductance and input dc inductance are designed. The proposed magnetic integration structure aims to reduce the number of cores, core volume, and power loss by integrating two input dc inductors, a series inductor, and a transformer into a single core. The series inductor and the primary windings of the transformer are connected in series. Therefore, the series inductor windings and the transformer's primary windings can be integrated, which can reduce the winding length and copper loss. Two variables, namely the number of the secondary winding turns and the height of the transformer's magnetic column, are freely selected. The entire core and printed circuit board (PCB) winding parameters can be calculated based on these two variables. Finally, the optimal set of parameters is chosen from multiple sets of core and PCB winding parameters, achieving the minimum volume and loss. The proposed magnetic integration structure and design method are applied to a 1 kW current-fed DAB dc-dc converter with a switching frequency of 100 kHz, an input voltage ranging from 40 to 60 V, and output voltage of 200 V. The experimental results demonstrate the operating mode, the soft switching performance, and high efficiency. © 1986-2012 IEEE.

关键词： Transformer windings

来源：评论

学校读者我要写书评

暂无评论

A Dynamic Leader-Follower Approach for Line Marching of Swarm Robots

引用

无人系统（英文） 2023年第1期11卷 67-82页

作者： He Cai Shuping Guo Huanli Gao School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641P.R.China

Most of the existing exact formation algorithms for swarm systems are fully label-specified,*** desired position for each individual in the formation is predetermined by its label,which would inevitably make the formation algorithms vulnerable to individual *** address this issue,in this paper,we propose a dynamic leader-follower approach to solving the line marching problem for a swarm of planar kinematic *** contrast to the existing results,the desired positions for the robots in the line are no longer predetermined by the robots'labels,but the relativity of the robots'labels as well as their real-time relative *** constantly forming the leader-follower chain,exact line marching can be realized by pairwise leader-following *** the order of the leader-follower chain keeps updating,the proposed algorithm shows strong robustness against robot *** numerical results are provided to evaluate the performance of the proposed formation algorithm.

关键词： Dynamic leader-follower approach exact formation line marching swarm robots

来源：评论

学校读者我要写书评

暂无评论

Water Content Control in Tobacco Leaf Loose and Moisture Regain Process based on Deep Reinforcement Learning

Water Content Control in Tobacco Leaf Loose and Moisture Reg...

引用

2024 China automation Congress, CAC 2024

作者： Liu, Yuqi Wu, Yue Gu, Jianhui Cao, Ye School of Automation Science and Engineering Xi’an Jiaotong University Xi’an China Co. Ltd School of Automation Science and Engineering Xi’an Jiaotong University Urumqi China

ISBN: (纸本)9798350368604

In this paper, the control problem of outlet moisture content is investigated for the tobacco leaf loosening and moisture regain process. Unlike existing strategies that heavily depend on manual expertise for adjusting water addition and hot air temperature, a novel control framework is proposed in this work. This framework integrates an optimal outlet moisture content control method and a traditional Proportion-Integral-Differential (PID) control loop, thereby reducing the dependence on manual intervention. Specifically, the hot air temperature and water addition flow rate are dynamically adjusted using the soft actor-critic (SAC) algorithm. Simulation results demonstrate that our proposed method can maintain the outlet moisture content with a steady-state precision of 0.1%. © 2024 IEEE.

关键词： Deep reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of flame detection system based on red and ultraviolet sensor 4

Design and implementation of flame detection system based on...

引用

4th International Conference on Telecommunications, Optics, and Computer Science, TOCS 2023

作者： Yu, Zhiming Zhang, Chengmao Feng, Shugang Song, Qiulong Wang, Miao School of Automation and Electrical Engineering Linyi University Linyi China School of Mechanical Engineering Linyi University Linyi China

ISBN: (数字)9781510679849

ISBN: (纸本)9781510679832

According to the combustion spectra of hydrocarbons, three infrared flame sensors (RD-913FB1, RD-913FB2, RD-913FB3) based on pyroelectric effect and ultraviolet flame sensor (R2868) based on photoelectric effect are used to develop a flame detector which can quickly detect the surrounding flame by means of its powerful calculation and control capability. By adopting the composite detection technology of four wave band sensors, the detection range of the flame radiation spectrum of the system is enlarged;amplifying and shaping the signal of the sensor by calculating and designing an amplifying filter circuit;The intelligent flame detection algorithm is designed according to the site environment, which can effectively judge whether the surrounding environment produces a fire or not, and quickly carry out acousto-optic alarm. Compared with traditional temperature and smoke flame detectors, the accuracy is also improved. The 0.4 m standard flame is used for the ignition experiment, and the external environment is changed to use automobile headlights, sunlight and artificial light sources as interference items to carry out anti-interference detection on the flame detector. The experimental results show that the flame detector has the characteristics of fast response speed, long detection distance and strong anti-jamming ability, which fully meets the design requirements. © 2024 SPIE.

关键词： Photoelectricity

来源：评论

学校读者我要写书评

暂无评论

Data-driven output regulation control for constrained linear systems

引用

Science China(Information Sciences) 2025年第3期68卷 338-353页

作者： Chaoyu XIA Yi DONG Chaoli WANG Shengyuan XU Shanghai Research Institute for Intelligent Autonomous Systems Tongji University College of Electronic and Information Engineering Shanghai Research Institute for Intelligent Autonomous SystemsTongji University Department of Control Science and Engineering School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology Department of Automation Nanjing University of Science and Technology

This study introduces a data-driven approach for state and output feedback control addressing the constrained output regulation problem in unknown linear discrete-time systems. Our method ensures effective tracking performance while satisfying the state and input constraints, even when system matrices are not available. We first establish a sufficient condition necessary for the existence of a solution pair to the regulator equation and propose a data-based approach to obtain the feedforward and feedback control gains for state feedback control using linear programming. Furthermore, we design a refined Luenberger observer to accurately estimate the system state, while keeping the estimation error within a predefined set. By combining output regulation theory, we develop an output feedback control strategy. The stability of the closed-loop system is rigorously proved to be asymptotically stable by further leveraging the concept of λ-contractive sets.

关键词： output regulation constrained system data-driven.

来源：评论

学校读者我要写书评

暂无评论

Event-Triggered Optimized Anti-Disturbance Dynamic Positioning for Marine Intelligent Vehicles Via Reinforcement Learning

IEEE Transactions on Intelligent Vehicles

引用

IEEE Transactions on Intelligent Vehicles 2024年 1-12页

作者： Gao, Xiaoyang Li, Tieshan Li, Meilin Chen, C.L.P. School of Maritime Economics and Management Dalian Maritime University Dalian China School of Automation Engineering University of Electronic Science and Technology of China Chengdu China School of Computer Science and Engineering South China University of Technology Guangzhou China

The dynamic positioning of marine intelligent vehicles is gradually becoming the core technique to perform herculean tasks in complex sea conditions. To cope with the composite ocean disturbances and the constraint of communication resources, this paper proposes an event-triggered anti-disturbance dynamic positioning control strategy with performance optimization via reinforcement learning. Firstly, to overcome the composite disturbances caused by external environmental disturbance and internal uncertainties, the disturbance estimator with a fuzzy logic system is established. By constructing an event-triggered mechanism that relies on position and heading information, an event-triggered optimized dynamic positioning controller is designed by combining modified backstepping and reinforcement learning methods. The designed controller consists of a composite anti-disturbance controller and an optimized compensator. Thus, unnecessary communication can be avoided and the performance index is minimized simultaneously. Furthermore, the errors of the closed-loop system are rigorously proved to be bounded. At last, the validity of the proposed control scheme for a marine intelligent vehicle is illustrated by simulation and comparison studies. IEEE

关键词： Reinforcement learning

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：