检索结果-内蒙古大学图书馆

Analysis of feature and welding consideration for metal bellows

Key engineering Materials 2011年 486卷 225-228页

作者： Wen, Hungjiun Lo, Yulin Chang, Kuo-Hwa Wen, Fuh-Liang Department of Industrial and System Engineering Chung Yuan Christian University Chungli Taoyuan County 32023 Taiwan Department of Mechanical and Computer-Aided Engineering Graduate Institute of Automation and Mechatronics St. John's University Tamsui New Taipei City 25135 Taiwan

The design and process of diaphragms for a welded bellow was studied in this paper, which is a flexible component in a piping system or vacuum equipment. Due to a lot of interactive effects on each procedure in the manufacturing for a welded bellow, furthermore the commercial FEM software ANSYS was used to construct a 3-dimension model for the displacement and modal analysis of bellows in which extensions and natural frequencies as well as mode shapes could be observed. The mechanical feature should be considered at the practical applications, i.e., to avoid the occurrence of resonant phenomena corresponding to pump operations and fluid delivery in a piping system. For the purpose of modeling validation, the axial tensile testing machine implemented the extension experiment for welded bellows. According to the results of simulation and experiment, the difference among them could be easily detected for the feature investigation for a design-oriented systemic analysis on the development of welded bellows. © (2011) Trans Tech Publications, Switzerland.

关键词： Tensile testing

来源：评论

学校读者我要写书评

暂无评论

Data-driven soft sensor design with multiple-rate sampled data: A comparative study 9

Data-driven soft sensor design with multiple-rate sampled da...

引用

2007 9th European Control Conference, ECC 2007

作者： Lin, Bao Recke, Bodil Knudsen, Jorgen K.H. Jorgensen, Sten Bay FLSmidth Automation ValbyDK-2500 Denmark Computer Aided Process-Product Engineering Center Department of Chemical Engineering Technical University of Denmark LyngbyDK-2800 Denmark

ISBN: (纸本)9783952417386

Multi-rate systems are common in industrial processes where quality measurements have slower sampling rate than other process variables. Since inter-sample information is desirable for effective quality control, different approaches have been reported to estimate the quality between samples, including numerical interpolation, polynomial transformation, data lifting and weighted partial least squares (WPLS). Two modifications to the original data lifting approach are proposed in this paper: reformulating the extraction of a fast model as an optimization problem and ensuring the desired model properties through Tikhonov Regularization. A comparative investigation of the four approaches is performed in this paper. Their applicability, accuracy and robustness to process noise are evaluated on a single-input single output (SISO) system. The regularized data lifting and WPLS approaches are implemented to design quality soft sensors for cement kiln processes using data collected from a plant log system. Preliminary results reveal that the WPLS approach is able to provide accurate one-step-ahead prediction. The regularized data lifting technique predicts the product quality of cement kiln systems reasonably well, demonstrating the potential to be used for effective quality control. © 2007 EUCA.

关键词： Quality control

来源：评论

学校读者我要写书评

暂无评论

Global and robust stability of interval hopfield neural networks with time-varying delays

引用

International Journal of Neural Systems 2003年第3期13卷 171-182页

作者： Liao, Xiaofeng Wang, Jun Cao, Jinde Department of Computer Science and Engineering Chongqing University Chongqing 400044 China Department of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 China Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong Hong Kong Department of Mathematics Southeast University Nanjing 210096 China

In this paper, we investigate the problem of global and robust stability of a class of interval Hopfield neural networks that have time-varying delays. Some criteria for the global and robust stability of such networks are derived, by means of constructing suitable Lyapunov functionals for the networks. As a by-product, for the conventional Hopfield neural networks with time-varying delays, we also obtain some new criteria for their global and asymptotic stability. © World Scientific Publishing Company.

关键词： Interval Hopfield neural networks Lyapunov functionals Robust stability Time-varying delays

来源：评论

学校读者我要写书评

暂无评论

APPLICATION OF SUPPORT VECTOR MACHINE BASED FAULT DIAGNOSIS

引用

IFAC Proceedings Volumes 2002年第1期35卷 221-226页

作者： Ming Ge Guicai Zhang Ruxu Du Yangsheng Xu Department of Automation and Computer-Aided Engineering The Chinese University of Hong Kong Hong Kong

The fault diagnosis is important in continuously monitoring the performance and quality of manufacturing processes. Overcoming the drawbacks of threshold approach, artificial neural network may extract the symptom of the faults through learning from the samples, but it is difficult to design its structure. Moreover, it needs a large numbers of samples in practice. In this paper, support vector machine approach was proposed to overcome these limitations based on statistics learning theory, and a new fault diagnosis system is developed. The experimental results showed that it is an efficient and practical on-line intelligent monitoring system for the stamping processes.

关键词： Machine Learning Intelligent Knowledge-based System Fault Diagnosis Pattern Identification Manufacturing Processes

来源：评论

学校读者我要写书评

暂无评论

Virtual reality based system for training on knee arthroscopic surgery

Virtual reality based system for training on knee arthroscop...

引用

4th Medicine Meets Virtual Reality Proceedings 1996, MMVR 1996

作者： Heng, Pheng-Ann Cheng, Chun-Yiu Wong, Tien-Tsin Xu, Yangsheng Chui, Yim-Pan Chan, Kai-Ming Tso, Shiu Kit Department of Computer Science and Engineering Hong Kong Department of Orthopaedics and Traumatology Hong Kong Department of Automation and Computer-Aided Enginering Chinese University of Hong Kong Hong Kong Department of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong Kong

ISBN: (纸本)1586034049

Surgical training systems based on virtual reality (VR) and simulation techniques offer a cost-effective and efficient alternative to traditional training methods. This paper describes a virtual reality system for training arthroscopic knee surgery. The virtual model used in this system is constructed from the Visual Human Project dataset. The system simulates the real-time deformation of soft tissue with topological change using finite element analysis. To offer the realistic tactile feedback, we construct a specialized force feedback hardware.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

QOS based control of teleoperation via internet 15th

QOS based control of teleoperation via internet

引用

15th World Congress of the International Federation of Automatic Control, 2002

作者： Fung, Wai-Keung Xi, Ning Lo, Wang-Tai Liu, Yun-Hui Department of Electrical and Computer Engineering Michigan State University East LansingMI48824 United States Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong

ISBN: (纸本)9783902661746

This paper presents an QoS (quality of service) based control system of teleoperation via the Internet. Quality of service on the Internet refers to a set of quality requirements on the performance of the data transmission necessary to achieve the required functionality of an application. The quality of data transmission via the Internet is measured or reflected by a set of QoS parameters. Since the stability of the teleoperation system is sensitive to the data transmission quality of the Internet, it is important to adjust the control strategy of robot systems in teleoperation based on the quality (reflected by measured QoS parameters) of the network for data transmission. One of the widely used QoS parameters is network delay. This paper proposes a robot controller gains adjustment scheme based on QoS parameters (network delay) measured using a quadratic programming approach. Moreover, a teleoperation experiment is presented to demonstrate the effectiveness of the proposed controller gains adjustment scheme. Copyright © 2002 IFAC.

关键词： Quality of service

来源：评论

学校读者我要写书评

暂无评论

Shock performance of a disk-drive assembly using active-passive piezoelectric actuators

Shock performance of a disk-drive assembly using active-pass...

引用

Asia-Pacific Magnetic Recording Conference 2006, APMRC 2006

作者： Chan, K.W. Liao, W.H. Smart Materials and Structures Laboratory Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong Shatin N. T. Hong Kong

ISBN: (纸本)1424408636

Current dual-stage actuator design uses withut pssiv daming. piezoelectric patches only In this paper, we propose a dual-stage servo system using enhanced active-passive hybrid piezoelectric actuators. The proposed configuration will improve the existing dual-stage actuators for higher precision and shock resistance, due to the incorporation of passive damping in the design. Finite element analyses of different types of piezoelectric actuators in a disk arm assembly under shock impulse are reported. In the shock test, a 175 g and 1 ms sinusoid acceleration pulse is applied at one end of the base and other end of the base is fixed. The shock responses of the disk arm assembly with different configurations of the piezoelectric actuators are simulated and compared. In the finite element analysis, the viscoelastic damping layers in the hybrid actuators are modeled with the Prony series, which parameters are determined from dynamic frequency data of nomograph.

关键词： Piezoelectric actuators

来源：评论

学校读者我要写书评

暂无评论

Incorporating topological derivatives into level set methods for structural topology optimization

Incorporating topological derivatives into level set methods...

引用

Collection of Technical Papers - 10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

作者： Wang, Xiaoming Mei, Yulin Wang, Michael Yu School of Mechanical Engineering Dalian University of Technology Dalian Liaoning 116024 China Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong Shatin NT Hong Kong

ISBN: (纸本)1563477165

The aim of this paper is to investigate the use of topological derivatives in combination with the level set method for topology optimization of solid structures. We present a topological derivative analysis and a technique of combining it with the level set model. The success of this combined approach is demonstrated in numerical examples, with a significantly high rate of convergence of the optimization process. Copyright © 2004 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Structural analysis

来源：评论

学校读者我要写书评

暂无评论

A mapping method for telemanipulation of the non-anthropomorphic robotic hands with initial experimental validation

A mapping method for telemanipulation of the non-anthropomor...

引用

2005 IEEE International Conference on Robotics and automation

作者： Heng, Wang Low, K.H. Michael, Yu Wang Feng, Gong School of Mechanical and Production Engineering Nanyang Technological University Singapore 639798 Singapore Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong Hong Kong Hong Kong

ISBN: (纸本)078038914X

A mapping algorithm is essential to teleoperate a robot hand. Joint-to-joint mapping, pose mapping and point-to-point mapping are three commonly used methods for telemanipulation. However, these methods might not produce satisfactory performance if the robot hand is non-anthropomorphic. This paper introduces a method for mapping based on the relative positions between finger-tips. An algorithm particularly for a three-fingered non-anthropomorphic robot hand is presented. The principle of the method is to find suitable parameters in the hand frame, to transform them to the robot frame, and then to compute the robot fingertip positions according to the transformed parameters. The mapping results and the comparisons with the traditional methods validate the advantages of the proposed method. ©2005 IEEE.

关键词： Robotic arms

来源：评论

学校读者我要写书评

暂无评论

KERNEL-BASED DATA COMPRESSION FOR ADVANCED MANUFACTURING SYSTEM

引用

Journal of Advanced Manufacturing Systems 2003年第1期2卷 89-104页

作者： MING GE YANGSHENG XU Department of Automation and Computer-Aided Engineering The Chinese University of Hong Kong Hong Kong China

Manufacturing system is becoming larger and more complicated. Global manufacturing chains have become common in the new millennium. Internet and intranet integrate the advanced manufacturing system. To perform remote monitoring and diagnosis in such chains and systems, real-time data compression has become a core factor in the efficient and effective exchange of information exchange via computer networks. This paper presents a new technique for compressing data using a kernel-based method. Overcoming the drawbacks of support vector techniques — that is, fast decompression but slow compression — the new method exhibits high speed in both phases. In addition, the new method can also be applied for pattern classification. Based on strain signal example tests derived from sheet metal stamping operations, the new method is very effective. The proposed technology has enormous potential in the application of advanced manufacturing system monitoring and control through internet or intranet.

关键词： Kernel-induced feature space feature samples selection data compression support vector techniques Internet-based monitoring sheet metal stamping

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：