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Coordination tools for MAS development and deployment

APPLIED ARTIFICIAL INTELLIGENCE 2002年第9-10期16卷 721-752页

作者： Denti, E Omicini, A Ricci, A Univ Bologna DEIS I-40136 Bologna Italy Univ Bologna DEIS Cesena FC Italy

One of the most critical issues in the engineering of multi-agent systems ( MAS) is the inadequacy of the available tools for MAS development and deployment. As we assume interaction as a first-class issue in MAS, tools are particularly required to monitor and debug inter-agents aspects, such as interaction protocols, coordination policies, social norms, and environment constraints. Since we claim that the definition of such tools is a basic research issue, in this paper we aim to identify the main requirements for development and deployment tools within an effective agent infrastructure. Focusing on agent interaction aspects, we take tuple-based coordination infrastructures - in particular the TuCSoN technology and tools - as our reference, and discuss the role of tools in a simple case study: the development and deployment of a well-known agent interaction protocol, the Contract Net.

关键词： INTELLIGENT agents (computer software) debugging in computer science SOCIAL norms

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An Adaptive Maintenance Model Oriented to Process Environment of the Manufacturing Systems

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MATHEMATICAL PROBLEMS IN ENGINEERING 2014年第1期2014卷 1-10页

作者： Gong, Xun Feng, Yixiong Zheng, Hao Tan, Jianrong Zhejiang Univ State Key Lab Fluid Power Transmiss & Control Hangzhou 310027 Zhejiang Peoples R China Soochow Univ Robot & Microsyst Ctr Suzhou 215006 Peoples R China

We explored an adaptive maintenance model of the process environment to diagnose progressive faults in manufacturing systems. Progressive faults are usually caused by deterioration of the operating environment or aging and show stochastic properties. Many researchers have reported how to detect faults on the machine body in manufacturing systems. However, little research has been conducted on the process environment which causes progressive faults. To tackle this problem, we explored an adaptive maintenance model to detect progressive faults and repair the process environment on the E-repair location. When a difference of the environmental factor state is detected, it will combine the transcription factor and the state enzyme to locate fault source. Then the comprehensive maintenance program is derived to repair the operating environment while eliminating progressive faults. For the purpose of validation, this model was implemented on the process environment of the air separation plant. And the simulation experiments validated the feasibility and effectiveness of this method.

关键词： MANUFACTURING processes STOCHASTIC analysis debugging in computer science TRANSCRIPTION factors MACHINE theory MATHEMATICAL models

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Study of Intelligent Photovoltaic System Fault Diagnostic Scheme Based on Chaotic Signal Synchronization

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MATHEMATICAL PROBLEMS IN ENGINEERING 2013年第1期2013卷 1-6页

作者： Hsieh, Chin-Tsung Shiu, Jen Natl Chin Yi Univ Technol Dept Elect Engn Taichung 41170 Taiwan

As the photovoltaic system consists of many equipment components, manual inspection will be very costly. This study proposes the photovoltaic system fault diagnosis based on chaotic signal synchronization. First, MATLAB was used to simulate the fault conditions of solar system, and the maximum power point tracking (MPPT) was used to ensure the system's stable power and capture and record the system fault feature signals. The dynamic errors of various fault signals were extracted by chaotic signal synchronization, and the dynamic error data of various fault signals were recorded completely. In the photovoltaic system, the captured output voltage signal was used as the characteristic values for fault recognition, and the extension theory was used to create the joint domain and classical domain of various fault conditions according to the collected feature data. The matter-element model of extension engineering was constructed. Finally, the whole fault diagnosis system is only needed to capture the voltage signal of the solar photovoltaic system, so as to know the exact fault condition effectively and rapidly. The proposed fault diagnostor can be implemented by embedded system and be combined with ZigBee wireless network module in the future, thus reducing labor cost and building a complete portable renewable energy system fault diagnostor.

关键词： SYNCHRONIZATION SIGNAL processing CHAOS theory PHOTOVOLTAIC power systems debugging in computer science SCHEME (computer program language) FEATURE extraction (Data processing)

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A Hybrid Approach for Fault Diagnosis of Railway Rolling Bearings Using STWD-EMD-GA-LSSVM

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MATHEMATICAL PROBLEMS IN ENGINEERING 2016年第1期2016卷 1-7页

作者： Yao, Dechen Yang, Jianwei Li, Xi Zhao, Chunqing Beijing Univ Civil Engn Architecture Sch Machine Elect & Automobile Engn Beijing 100044 Peoples R China Beijing Univ Civil Engn Architecture Beijing Key Lab Performance Guarantee Urban Rail Beijing 100044 Peoples R China Mass Transit Railway Operat Corp Ltd Subway Operat Technol Ctr Beijing 102208 Peoples R China

Vibration signals resulting from railway rolling bearings are nonstationary by nature;this paper proposes a hybrid approach for the fault diagnosis of railway rolling bearings using segment threshold wavelet denoising (STWD), empirical mode decomposition (EMD), genetic algorithm (GA), and least squares support vector machine (LSSVM). The original signal is first denoised using STWD as a prefilter, which improves the subsequent decomposition into a number of intrinsic mode functions (IMFs) using EMD. Secondly, the IMF energy-torques are extracted as feature parameters. Concurrently, a GA is employed to optimize the LSSVM to improve the classification accuracy. Finally, the extracted features are used as inputs for classification by the GA-LSSVM. Actual railway rolling bearing vibration signals are used to experimentally verify the effectiveness of the proposed method. The results show that the novel method is effective and accurate for fault diagnosis of railway rolling bearings.

关键词： VIBRATION (Mechanics) WAVELETS (Mathematics) debugging in computer science GENETIC algorithms SUPPORT vector machines DISCRIMINANT analysis

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On fault-tolerant control configurations for a class of nonlinear systems

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JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS 2015年第4期352卷 1397-1416页

作者： Li, Linlin Yang, Ying Ding, Steven X. Zhang, Yong Zhai, Shouchao Univ Duisburg Essen Fac Engn Inst Automat Control & Complex Syst AKS D-47057 Duisburg Germany Peking Univ Coll Engn Dept Engn Sci & Mech State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China Tsinghua Univ Dept Automat Beijing 100084 Peoples R China

This paper studies the configurations of fault-tolerant controllers for affine nonlinear systems. The design philosophy is highlighted by the observer and residual generator based controller parametrization and the integration of a fault diagnosis system. To be specific, a novel interpretation for the design of fault-tolerant controllers is first introduced with the combination of any stabilizing controller and a residual-driven dynamic compensator. It allows us to attain the separate design of system stability performance and fault tolerance. Under such circumstances, the whole design procedures finally realize the maintenance and life-circle management of affine nonlinear systems. In the end, a design scheme of the fault-tolerant control framework is proposed. (C) 2015 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.

关键词： FAULT-tolerant control systems SET theory NONLINEAR systems PID controllers debugging in computer science STABILITY theory

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Fostering debugging communities on the web

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COMMUNICATIONS OF THE ACM 1997年第4期40卷 65-71页

作者： Domingue, J Mulholland, P The Open Univ. Milton Keynes UK

In this article authors describe an approach to fostering debugging communities on the World-Wide Web, that will enable programmers to collaboratively debug programs synchronously and asynchronously. Over the past couple of years, a significant number of communities have benefited by interacting through the net using newsgroups and Webpages. To describe a bug, programmer needs to describe the code, the point in the execution where the symptom occurs, and the context. The article aims to make it easy for programmers to swap bug descriptions around the world. Therefore, system should be platform independent, run on relatively modest hardware, and should not require exchange of source code. Internet Software Visualization Laboratory (ISVL) is an approach to solving bug-description-sharing problem, which uses a client/server architecture to deliver visualizations any Java-enabled Web browser. Using a Java-enabled Web browser, programmers can connect to the ISVL client. Using the client, programmers can upload and run their programs on the server and receive back a visualization.

关键词： World Wide Web computer software computer programmers debugging in computer science Source code (computer science) Java (computer program language)

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Diagnosability of digital systems structured as minimal quasicomplete 7 x 7 graph

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AUTOMATION AND REMOTE CONTROL 2016年第3期77卷 485-494页

作者： Vedeshenkov, V. A. Kurako, E. A. Lebedev, V. N. Russian Acad Sci Trapeznikov Inst Control Sci Moscow Russia

An approach was developed to estimate the values of diagnosability of digital systems with the novel structure of the minimal quasicomplete 7 x 7 graph. The proposed estimates of the values of diagnosability of the digital systems under consideration were established as the result of diagnosis of fault situations in a system of 7 users and 7 switches. Consideration was given to two variants of organization of the components of the analyzed digital system for which different estimates of diagnosability were established.

关键词： DIGITAL technology GRAPH theory debugging in computer science USER interfaces (computer systems) ESTIMATION theory

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A BRB Based Fault Prediction Method of Complex Electromechanical Systems

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MATHEMATICAL PROBLEMS IN ENGINEERING 2015年第1期2015卷 1-8页

作者： Zhang, Bangcheng Yin, Xiaojing Wang, Zhanli Han, Xiaoxia Gao, Zhi Changchun Univ Technol Sch Mechatron Engn Changchun 130012 Peoples R China High Tech Inst Xian Xian 710025 Peoples R China

Fault prediction is an effective and important approach to improve the reliability and reduce the risk of accidents for complex electromechanical systems. In order to use the quantitative information and qualitative knowledge efficiently to predict the fault, a new model is proposed on the basis of belief rule base (BRB). Moreover, an evidential reasoning (ER) based optimal algorithm is developed to train the fault prediction model. The screw failure in computer numerical control (CNC) milling machine servo system is taken as an example and the fault prediction results show that the proposed method can predict the behavior of the system accurately with combining qualitative knowledge and some quantitative information.

关键词： debugging in computer science ELECTROCHEMISTRY computer reliability INFORMATION theory computer algorithms

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Fault Diagnosis and Fault-Tolerant Control of Uncertain Robot Manipulators Using High-Order Sliding Mode

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MATHEMATICAL PROBLEMS IN ENGINEERING 2016年第1期2016卷 1-14页

作者： Van, Mien Franciosa, Pasquale Ceglarek, Dariusz Univ Warwick WMG Mfg Syst & Digital Lifecycle Management Grp Coventry W Midlands England

A robust fault diagnosis and fault-tolerant control (FTC) system for uncertain robot manipulators without joint velocity measurement is presented. The actuator faults and robot manipulator component faults are considered. The proposed scheme is designed via an active fault-tolerant control strategy by combining a fault diagnosis scheme based on a super-twisting third-order sliding mode (STW-TOSM) observer with a robust super-twisting second-order sliding mode (STW-SOSM) controller. Compared to the existing FTC methods, the proposed FTC method can accommodate not only faults but also uncertainties, and it does not require a velocity measurement. In addition, because the proposed scheme is designed based on the high-order sliding mode (HOSM) observer/controller strategy, it exhibits fast convergence, high accuracy, and less chattering. Finally, computer simulation results for a PUMA560 robot are obtained to verify the effectiveness of the proposed strategy.

关键词： FAULT-tolerant control systems MANIPULATORS (Machinery) debugging in computer science SLIDING mode control UNCERTAINTY computer simulation

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Patching processor design errors with programmable hardware

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IEEE MICRO 2007年第1期27卷 12-25页

作者： Sarangi, Smruti Narayanasamy, Satish Carneal, Bruce Tiwari, Abhishek Calder, Brad Torrellas, Josep Univ Illinois Urbana IL 61801 USA Univ Calif San Diego Dept Comp Sci San Diego CA 92103 USA

Equipping processors with programmable hardware to patch design errors lets manufacturers release regular hardware patches, avoiding costly chip recalls and potentially speeding time to market. For each error detected, the manufacturer creates a fingerprint, which the customer uses to program the hardware. The hardware watches for error conditions;when they arise, it takes action to avoid the error.

关键词： computer architecture INFORMATION technology PROGRAMMABLE controllers PRODUCTION standards MICROPROCESSORS debugging in computer science EXECUTION traces (computer program testing) MICROTECHNOLOGY AMD microprocessors PENTIUM (Microprocessor) DESIGN & construction

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