检索结果-内蒙古大学图书馆

American control Conference

作者： Jingwei Zhu Michael Z. Q. Chen Zhiqiang Zuo Baozhu Du Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign Champaign IL 61820 USA. Department of Mechanical Engineering The University of Hong Kong Hong Kong and HKU Shenzhen Institute of Research and Innovation Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 P.R.China. School of Automation Nanjing University of Science and Technology Nanjing P.R.China.

ISBN: (纸本)9781479932757

Improvement of the overall efficiency of energy infrastructure is one of the main anticipated benefits of the deployment of smart grid technology. Advancement in energy storage technology and two-way communication in the electric network are indispensable components to achieve such a vision, while efficient pricing schemes and appropriate storage management are also essential. In this paper, we propose a novel pricing scheme which permits one to indirectly control the energy storage devices in the grid to achieve a more desirable aggregate demand profile that meets a particular target of the grid operator such as energy generation cost minimization and carbon emission reduction. Such a pricing scheme can potentially be applied to control the behavior of energy storage devices installed for integration of intermittent renewable energy sources that have permission to grid connection and will have broader applications as an increasing number of novel and low-cost energy storage technologies emerge.

关键词： Pricing Scheme controlling Energy Storage Devices Smart Grid Smart grids Energy storage devices Pricing Renewable energy renewable energy sources bidirection communication Store management

来源：评论

学校读者我要写书评

暂无评论

Transmission-mode ultrasonic measurement for gas/water two-phase flow 7

Transmission-mode ultrasonic measurement for gas/water two-p...

引用

7th World Congress in Industrial process Tomography, WCIPT7

作者： Xu, C. Tan, C. Zhang, W. Dong, F. Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin300072 China

ISBN: (纸本)9780853163237

As a non-contact, low-cost and high-resolution 2D/3D boundary technique, UCT has wide application prospect. For gas/water two-phase flow, the ultrasonic energy would be reflected about 99.94% at the boundary. The relations between voltage loss and bubble diameter can be established due to the near total reflection at the boundary. One-transmitter-three-receiver narrow band ultrasonic measurement system was developed for two-phase flow measurement. Calibration experiments were conducted in different diameters. After the calibration, the image reconstructed by filtered linear back-projection method showed that the images had good resolution with minimum resolvable diameter of 1.5mm. © 2014 International Society for Industrial process Tomography.

关键词： Data acquisition

来源：评论

学校读者我要写书评

暂无评论

A new usage of reconstruction based contributions for quality-related fault diagnosis

A new usage of reconstruction based contributions for qualit...

引用

第25届中国控制与决策会议

作者： Gang Li Kaixiang Peng Jie Ma Donghua Zhou department of Automation TNList Tsinghua University Key Laboratory for Advanced Control of Iron and Steel Process School of Automation and Electrical Engineering University of Science and Technology of Beijing Automation College Beijing Information Science and Technology University

ISBN: (纸本)9781467355339

Quality-related fault detection attracted more and more attention in quality control and process monitoring. In recent literature, reconstruction based contributions (RBC) are used for isolating faulty variables which affect product quality. If datasets of known faults are available, fault-specific RBCs are used to identify fault types. Otherwise, variable RBCs are used to isolate faulty variables. However, the existing generalized RBC are quite improvable. On one side, fault-specific RBC can not tell faulty variables, which makes it hard to locate fault root. On the other side, it is well known that the variable RBC suffers a lot from the smearing effect, which provides too many candidates of faulty variables. In the present work, a new usage of RBC is derived to select faulty variables without smearing effect on non- faulty variables. The benchmark examples of Tennessee Eastman (TE) process is used to demonstrate the efficiency of the proposed approach for quality-related fault diagnosis.

关键词： fault diagnosis and isolation, multidimensional reconstruction based contribution, quality-related faults, smearing effect, total projection to latent structures

来源：评论

学校读者我要写书评

暂无评论

Disturbance Rejection in Hydraulic automation Position control System for Rolling Mills

Disturbance Rejection in Hydraulic Automation Position Contr...

引用

第三十二届中国控制会议

作者： WANG Lijun LI Qing TONG Chaonan YIN Yixin GAO Zhiqiang ZHENG Qinling School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process(Ministry of Education) Center for Advanced Control Technologies Cleveland State University

ISBN: (纸本)9781479900305

The hydraulic automation position control(HAPC) system for rolling mills is always difficult to design with high accuracy due to the uncertainties and other external *** a linear,low-order and optimization parameters, the high-order uncertain dynamics and unknown disturbances in plant dynamics is estimated by extended state observer(ESO). The resulting active disturbance rejection control(ADRC) is simple to use,easy to *** results show that the proposed ADRC has better robustness and adaptability than PID.

关键词： Disturbance rejection Uncertainty Extended state observer Hydraulic automation position control

来源：评论

学校读者我要写书评

暂无评论

Identification of Linear Parameter Varying Systems with Missing Output Data Using Generalized Expectation-Maximization Algorithm

引用

IFAC Proceedings Volumes 2014年第3期47卷 9364-9369页

作者： X. Yang W. Xiong B. Huang H. Gao Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin Heilongjiang 150080 China Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University Wuxi Jiangsu 214122 China Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta T6G 2G6 Canada Research Institute of Mechatronics and Automation Bohai University Jinzhou 121013 China and Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin Heilongjiang 150080 China

This paper is concerned with the identification problems of linear parameter varying (LPV) systems with randomly missing output data. Since one local linearized model cannot capture the global dynamics of the nonlinear industrial process, the multiple-model LPV model in which the global model is constructed by smoothly weighted combination of multiple local models is considered here. The problem of missing output variables data is commonly encountered in practice. In order to handle the multiple-model identification problems of LPV systems with incomplete data, the local model is taken to have a finite impulse response (FIR) model structure and the generalized expectation-maximization (EM) algorithm is adopted to estimate the unknown parameters of the global LPV model. To avoid the problems of ill-conditioned matrices and high sensitivity of parameters to noise, the prior information on the coefficients of each local FIR model is employed to construct the prior probability of unknown parameters. Then the maximum a posteriori (MAP) estimates of the global model parameters are derived via the generalized EM algorithm. The numerical example is presented to demonstrate the effectiveness of the proposed method.

关键词： Linear parameter varying systems Generalized EM algorithm Missing output data Maximum a posteriori estimates

来源：评论

学校读者我要写书评

暂无评论

3D reconstruction of single rising bubble in water using digital image processing and characteristic matrix

3D reconstruction of single rising bubble in water using dig...

引用

作者： Bian, Yuchen Dong, Feng Zhang, Weida Wang, Hongyi Tan, Chao Zhang, Zhiqiang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China School of Electrical Engineering and Automation Tianjin Polytechnic University Tianjin 300387 China

Reconstructing the shape of a bubble will lay a firm foundation for further description of the dynamic characteristics of bubbly flow, especially for a single rising bubble or separate bubbles whose interaction could be neglected. In this case, the rising bubble is usually simulated as an ellipsoid consisting of two semi-ellipsoids up and down. Thus the projected image of a bubble consists of two semi-ellipses. In this paper, a method for reconstructing the ellipsoid bubble model is described following digital image processing, using the Hough transform in 2D ellipse parameter extraction which could cover most of the bubble edge points in the image. Then a method based on characteristic symmetric matrix is described to detect 3D bubble ellipsoid model parameters from 2D ellipse parameters of projection planes. This method can be applied to bubbles rising with low-velocity in static flow field much in conformity with the projection theory and the shape variation of the rising bubble. This method does not need to solve nonlinear equation sets and provides an easy way to calculate the characteristic matrix of a space ellipsoid model for deformed bubble. For bubble application, two assumed conditions and a calibration factor are proposed to simplify calculation and detection. Errors of ellipsoid center and three axes are minor. Errors of the three rotation angles have no negative effect on further study on bubbly flow. © 2012 Chinese Society of Particuology and Institute of process engineering, Chinese Academy of Sciences.

关键词： Nonlinear equations

来源：评论

学校读者我要写书评

暂无评论

Scheduling Method for Tire Building Based on Heuristic Algorithm

Scheduling Method for Tire Building Based on Heuristic Algor...

引用

第25届中国控制与决策会议

作者： Shengping Yu Diancai Yang Kehui Zhu Shaowen Lu Key Laboratory of Process Industry Automation of Ministry of Education Northeastern University Mesnac Co. Ltd National Tire Technology and Control Engineering Technology Research Center

ISBN: (纸本)9781467355339

There are more product specifications, great production and much equipment over the whole process of tire building. The actual complex scheduling problem of tire building is described in detail. To solve the complex multi-objective, large-scale production scheduling problem of tire building, a heuristic algorithm is proposed from the experience of the experts. The algorithm was tested by online data. Results show that the heuristic algorithm can quickly workout the optimal production scheduling of tire building, reduce the production cost, and improve productivity. The algorithm will lay the firm groundwork for application to production process in the future.

关键词： Tire Building Scheduling Heuristic Algorithm

来源：评论

学校读者我要写书评

暂无评论

Experimental on two sensors combination used in horizontal pipe gas-water two-phase flow

引用

AIP Conference Proceedings 2014年第1期1592卷

作者： Hao Wu Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China

Gas-water two phase flow phenomenon widely exists in production and living and the measurement of it is meaningful. A new type of long-waist cone flow sensor has been designed to measure two-phase mass flow rate. Six rings structure of conductance probe is used to measure volume fraction and axial velocity. The calibration of them have been made. Two sensors have been combined in horizontal pipeline experiment to measure two-phase flow mass flow rate. Several model of gas-water two-phase flow has been discussed. The calculation errors of total mass flow rate measurement is less than 5% based on the revised homogeneous flow model.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Nonlinear asymptotic attitude tracking control of an underactuated 3-degree-of-freedom helicopter using neural network feedforward term

引用

控制理论与应用（英文版） 2013年第3期11卷 428-435页

作者： Xiang LIU Bin XIAN Jianchuan GUO Bo ZHAO Chen DIAO Institute of Robotics and Autonomous System Tianjin Key Laboratory of Process Measurement and Control and School of Electrical Engineering and Automation Tianjin University

This paper proposes a new asymptotic attitude tracking controller for an underactuated 3-degree-of-freedom （DOF） laboratory helicopter system by using a nonlinear robust feedback and a neural network （NN） feedforward term. The nonlinear robust control law is developed through a modified inner-outer loop approach. The application of the NN-based feedforward is to compensate for the system uncertainties. The proposed control design strategy requires very limited knowledge of the system dynamic model, and achieves good robustness with respect to system parametric uncertainties. A Lyapunov-based stability analysis shows that the proposed algorithms can ensure asymptotic tracking of the helicopter＇s elevation and travel motion, while keeping the stability of the closed-loop system. Real-time experiment results demonstrate that the controller has achieved good tracking performance.

关键词： 3-DOF helicopter Nonlinear Robust control Asymptotic tracking

来源：评论

学校读者我要写书评

暂无评论

control Lyapunov function based feedback design for quasi-polynomial systems

Control Lyapunov function based feedback design for quasi-po...

引用

9th IFAC Symposium on Nonlinear control Systems, NOLCOS 2013

作者： Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia Veszprem Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

ISBN: (纸本)9783902823472

The aim of this work is to present an entropy-like Lyapunov function based dynamic feedback design technique for quasi-polynomial and Lotka-Volterra systems. It is shown, that the dynamic feedback design problem is equivalent to the feasibility of a bilinear matrix inequality. The problem is also formulated as a control Lyapunov function based feedback design when the Lyapunov function parameters are given, the solution of this problem can be obtained by solving a linear matrix inequality. The developed method is illustrated on a simple numerical example. © IFAC.

关键词： Design

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：