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Stepping experiment analysis of a biaxial piezoelectric actuated stage

2013 International Conference on Advances in Materials Science and Manufacturing Technology, AMSMT 2013

作者： Mou, Shann Chyi Zhuang, Yu Ren Department of Mechanical Engineering Chien Hsin University of Science and Technology Taiwan Institute of Computer Communication and System Engineering Ching Yun University Taiwan

ISBN: (纸本)9783037857984

In this research, our research team used the self-designed piezoelectric actuator to achieve the micro/nanometer level precise positioning biaxial piezoelectric actuated stage through the redesign of stage mechanism. A novel piezoelectric actuator structure - 4-9-9-14 piezoelectric actuator is constructed, and it is made of piezoelectric buzzer to drive the stage. The movement of the piezoelectric actuated stage is read and analyzed by means of NI PCI-6115 data acquisition card and Lab- VIEW software operating in conjunction with a linear encoder. The new consideration of tuning time Ton is used to place of traditional method of changing the magnitude of driving voltage to control the stepping distance of the stage. Under a constant driving voltage, the displacement of the stage increases with time Ton, and the displacement of the stage decreases with time Ton. The aforesaid phenomenon occurs to leftward or rightward movement of the upper stage and forward or backward movement of the lower stage. Given a constant time Ton, the displacement of the stage in motion decreases with the driving voltage, and the displacement of the stage in motion increases with the driving voltage. © (2013) Trans Tech Publications, Switzerland.

关键词： Piezoelectric actuators

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Multi-sensor based autonomous planning for robotic manufacturing systems

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2013 3rd International Symposium on Chemical engineering and Material Properties, ISCEMP 2013

作者： Chung, Wei Der Na, Woon Ki Shie, Shih-Chieh Chen, Hsin-Pei Hue, Xiao Mechanical and System Research Laboratory Industrial Technology Research Institute Hsinchu Taiwan Department of Electrical and Computer Engineering Bradley Unsiversity Peoria IL 61625 United States Department of Computer Science and Information Engineering National Formosa University Yunlin County Taiwan Department of Mechanical Engineering Tungnan University New Taipei City Taiwan

ISBN: (纸本)9783037858363

Current trends in precision machinery include increased adaptability, speed and reliability. This, combined with the development of artificially-intelligent automatic sensors can lead to the establishment of highly-reliable and systematic manufacturing systems. During the automation process, equipment process parameters frequently need to be adjusted to match the requirements of different processes. Thus how to best maintain normal equipment operation and stable quality through these frequent adjustments is a key issue for manufacturers. Therefore, high-quality automated production systems allowing for fast-changeover and real-time automatic detection and performance monitoring are effectively needed. © (2013) Trans Tech Publications, Switzerland.

关键词： Manufacture

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Low concentration oil separation and detection from environmental water samples through acoustophoresis

Low concentration oil separation and detection from environm...

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17th International Conference on Miniaturized systems for Chemistry and Life Sciences, MicroTAS 2013

作者： Wang, H. Kim, S. Koo, C. Cho, Y. Kim, Y.-J. Han, A. Department of Electrical and Computer Engineering Texas A and M University United States Department of Biomedical Engineering Texas A and M University United States Department of Mechanical System Design Engineering Seoul National University of Science and Technology Korea Republic of Department of Mechanical Engineering Texas A and M University United States

ISBN: (纸本)9781632666246

Detecting low concentrations of oil has immense importance in marine environment monitoring, especially in the case of large-scale oil spill and chronic oil discharge. Current fluorescence based oil detectors have trade-offs between detection sensitivity and portability/cost. A microfluidic low concentration oil droplet trapping and detection system was developed based on acoustophoretic droplet manipulation that oil droplets in water move towards acoustic pressure antinodes and can be separated or trapped, facilitating highly sensitive fluorescent detection of accumulated oil droplets from environmental samples. The developed oil detection system is expected to be used as a portable and field-deployable low-cost oil spill detector.

关键词： Oil spills

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Signature-based multi-layer distributed intrusion detection system using mobile agents

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International Journal of Network Security 2013年第2期15卷 97-105页

作者： Uddin, Mueen Rehman, Azizah Abdul Uddin, Naeem Memon, Jamshed Alsaqour, Raed Kazi, Suhail Faculty of Computer Engineering and Technology Asia Pacific University of Technology and Innovation Bukit Jalil 57000 Kuala Lumpur Malaysia Department of Information System Faculty of Computer Science and Information Systems Universiti Technologi Malaysia 81310 Skudai Johor Malaysia School of Computer Science Faculty of Information Science and Technology University Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Faculty of Mechanical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia

The Internet and computer networks are exposed to an increasing number of security threats. With new types of attacks appearing continually, developing flexible and adaptive security oriented approaches is a severe challenge. Intrusions detection systems (IDSs) are systems that try to detect attacks as they occur or after the attacks took place. IDSs collect network traffic information from some point on the network or computer system and then use this information to secure the network. In this context, signature-based network intrusion detection techniques are a valuable technology to protect target systems and networks against malicious activities. Signature-based detection is the most extensively used threat detection technique for (IDSs). One of the foremost challenges for signature-based IDSs is how to keep up with large volume of incoming traffic when each packet needs to be compared with every signature in the database. When an IDS cannot keep up with the traffic flood, all it can do is to drop packets, therefore, may miss potential attacks. This paper proposes a new model called Signature-based Multi-Layer IDS using mobile agents, which can detect imminent threats with extremely high success rate by dynamically and automatically creating and using small and efficient multiple databases, and at the same time, provide mechanism to update these small signature databases at regular intervals using mobile agents.

关键词： Mobile agents

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Supervisor synthesis and performance improvement for automated manufacturing systems by using Petri nets

Supervisor synthesis and performance improvement for automat...

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2013 IEEE International Conference on Automation Science and engineering, CASE 2013

作者： Hu, Hesuan Zhou, Mengchu Liu, Yang School of Electro-mechanical Engineering Xidian University Xi'an Shaanxi 710071 China School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States

ISBN: (纸本)9781479915156

Behavior management and performance evaluation are two significant issues in the design and operation of automated manufacturing systems (AMS). The former constrains their dynamics so as to avoid improper behavior and eliminate downtime, while the latter aims to evaluate cycle time. Although abundant research has been conducted on each issue independently, researchers rarely address both in a correlative way. Without accurate and prompt guidance to route parts, it is difficult for an AMS to manage the production process in an optimal manner. In the paradigm of Petri nets, we show that it is crucial to optimize certain local priorities for the sake of cycle time minimization or throughput maximization. Without making radical changes to the system structure, our method can well design some control parameters in order to meet system performance requirement. An algorithm of polynomial complexity is presented to derive supervisory controllers, if existing, to improve system performance. © 2013 IEEE.

关键词： Petri nets

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Maximally permissive distributed control of large scale automated manufacturing systems modeled with Petri nets

Maximally permissive distributed control of large scale auto...

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2013 IEEE International Conference on Automation Science and engineering, CASE 2013

ISBN: (纸本)9781479915156

Ensuring nonblockingness remains challenging for automated manufacturing systems (AMS) owing to their discrete event dynamics. Both scalability and maximal permissiveness are essential for the synthesis and implementation of their centralized supervisors. Inspired by the divide and conquer philosophy, this work proposes a partition methodology and distributed control technique for large scale AMS. They are represented as interconnected and overlapping subsystems sharing some common components in terms of buffers. For each subsystem, a local supervisor is designed based on its local behavior and neighboring information only. Generalizing the existing results, we develop a condition under which the control law via decomposition promises the maximal permissiveness. Buffer capacities are well designed for the sake of their decomposition into multiple overlapping subsystems. Theoretical results are developed to characterize the behavior compatibility among local controllers. An experimental study illustrates the effectiveness of the proposed method. © 2013 IEEE.

关键词： Supervisory personnel

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Research and development of robotic manufacturing cell control system

Research and development of robotic manufacturing cell contr...

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43rd International Conference on computers and Industrial engineering 2013, CIE 2013

作者： Yujun, Yang Yu, Tao Shaolian, Wu Haobin, Luo Key Laboratory of Computer Integrated Manufacturing System of Guangdong Province Guangzhou China Institute of Mechanical and Electronic Engineering Guangdong University of Technology Guangzhou China Greatoo Inc State Council State-level Center of Technological Development Jieyang China

ISBN: (纸本)9781629934372

This paper investigates the field of robotic manufacturing cell control system (RMCCS). In order to satisfy characteristics of robotic manufacturing cell, such as autonomy, reconfigurable, cooperation etc, the cell control system is designed in detail and the software structure is built. There are three modules in this cell control system: (1) system modelling module realizes the modelling of static and dynamic production jobs. (2)Operation control module realizes the scheduling and monitoring the production jobs. (3)Communication services module provides the mechanism of communication among different NC and robot equipments. Finally, a prototype is developed and applied in the enterprise.

关键词： Cells

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Petri net modeling and one-wafer scheduling of single-arm multi-cluster tools

Petri net modeling and one-wafer scheduling of single-arm mu...

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2013 IEEE International Conference on Automation Science and engineering, CASE 2013

作者： Zhu, Qinghua Wu, Naiqi Qiao, Yan Zhou, Mengchu School of Computer Guangdong University of Technology Guangzhou 510006 China Macau University of Science and Technology China Department of Industrial Engineering School of Electro-Mechanical Engineering Guangdong University of Technology Guangzhou 510006 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102-1982 United States

ISBN: (纸本)9781479915156

It is very challenging to schedule a multi-cluster tool for it needs to coordinate the activities of multiple robots. This paper studies one-wafer cyclic scheduling for multi-cluster tools whose bottleneck cluster tool is process-bound. A Petri net model is developed to describe the system. Based on the model, it is shown that, for any multi-cluster tool whose bottleneck cluster tool is process-bound, there is always a one-wafer cyclic schedule. Then, a method is presented to find the minimal cycle time and the optimal one-wafer cyclic schedule. The method requires only simple calculation. An example illustrates the application and effectiveness of the proposed method. © 2013 IEEE.

关键词： Scheduling

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Scheduling of time constrained dual-arm cluster tools with wafer revisiting

Scheduling of time constrained dual-arm cluster tools with w...

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2013 IEEE International Conference on Automation Science and engineering, CASE 2013

作者： Qiao, Yan Wu, Naiqi Zhou, Mengchu Department of Industrial Engineering School of Electro-Mechanical Engineering Guangdong University of Technology Guangzhou 510006 China Macau University of Science and Technology China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102-1982 United States

ISBN: (纸本)9781479915156

This work intends to schedule a dual-arm cluster tool for the atomic layer deposition (ALD) process with wafer residency time constraints. ALD is a typical wafer revisiting process. Based on the analysis of system properties, a novel scheduling strategy called modified 1-wafer cyclic scheduling is derived. With this strategy, necessary and sufficient schedulability conditions are established. If schedulable, scheduling algorithms are presented to obtain a feasible and optimal schedule. By the proposed method, a schedule can be found by just simple calculation. An illustrative example is given to show the application of the proposed approach. © 2013 IEEE.

关键词： Atomic layer deposition

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A block partitioning algorithm for modular robot reconfiguration under uncertainty

A block partitioning algorithm for modular robot reconfigura...

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European Conference on Mobile Robots (ECMR)

作者： Ayan Dutra Prithviraj Dasgupta José Baca Carl Nelson University of Nebraska System Lincoln NE US Computer Science Department University of Nebraska Omaha Mechanical and Materials Engineering Department University of Nebraska-Lincoln

We consider the problem of reconfiguring a modular self-reconfigurable robots (MSRs) in the presence of uncertainty due to operational limitations of the robot and dynamic nature of the environment. We employ a coalition game theory-based technique to address this problem by representing a configuration of the modules as a coalition structure and finding the `best' configuration by searching for the optimal coalition structure. The key contribution of this paper is to speed up the search by making the observation that the maximum size a group or coalition of modules can have is limited to a maximum value, n max , which is determined by the operational and mobility constraints of the modules. We then propose an anytime algorithm called BlockPartitioning that uses integer partitioning along with an intelligent pruning technique to reject coalitions that are infeasible either due to their excessive size or due to excessive cost of coming together under current operational conditions. We have provided analytical results for our algorithm and also simulated it with different number of modules and different values of the maximum coalition size of an MSR called ModRED, and, shown that our algorithm takes nominal time to find the optimal solution (less than 1 sec. for up to 12 modules).

关键词： Uncertainty Partitioning algorithms Robot sensing systems Search problems Complexity theory Noise

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