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2014 9th International Symposium on Safety Science and Technology, ISSST 2014

作者： Li, Mailiang Sun, Zhiqiang Gong, Erling System Analysis Institute Air Force Armament Research Academy Beijing100076 China Department of Automatic Control College of Mechatronic Engineering and Automation National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781634396882

One approach based on AC20-128A is presented in order to assess the risk caused by uncontained engine rotor failure (UERF). In this approach, the risk assessment procedure includes hazard identification and hazard quantification. In the step of hazard identification, the catastrophic functional hazards, derived from the functional hazard analysis (FHA) results for the airplane, are used as the top events to construct the fault trees. The minimal cut sets (MSCs) of the fault trees are the hazards to be identified exactly. In the step of hazard quantification, the probability of one hazard triggered by some uncontained debris is evaluated. After the probabilities of all the identified hazards are quantified, the risk assessment of the airplane is completed. And the assessment result is compared with the design specifications to show compliance with the safety design. A small example is introduced to illustrate the rationality and accuracy of the aforementioned method. © 2014 The Authors. Published by Elsevier Ltd.

关键词： Risk assessment

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An approach to distributed robust model predictive control of discrete-time polytopic systems 19

An approach to distributed robust model predictive control o...

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Grancharova, Alexandra Olaru, Sorin Institute of System Engineering and Robotics Bulgarian Academy of Sciences Acad. G. Bonchev str. Sofia1113 Bulgaria Automatic Control Department EPI INRIA DISCO Gif-sur-Yvette France

ISBN: (纸本)9783902823625

A suboptimal approach to distributed robust MPC for uncertain systems consisting of polytopic subsystems with coupled dynamics subject to both state and input constraints is proposed. The approach applies the dynamic dual decomposition method and reformulates the original centralized robust MPC problem into a distributed robust MPC problem. It is based on distributed on-line optimization by applying an accelerated gradient method. The suggested approach is illustrated on a simulation example of an uncertain system consisting of two interconnected polytopic subsystems. © IFAC.

关键词： Discrete time control systems

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Agent-based reconfiguration at controller level

Agent-based reconfiguration at controller level

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Rafael Priego Unai Gangoiti Darío Orive Marga Marcos Department of Automatic Control and System Engineering University of the Basque Country UPV/EHU Bilbao Spain

Current automation systems need to be able to cope with the continuously changing requirements of the applications in terms of complexity, extensibility and dynamism. To match these challenging requirements, modern automation systems need to incorporate new software engineering techniques. These techniques must provide to the automation systems additional abilities such as diagnosis and reconfiguration. This paper describes an approach for the design of a Multi-Agent system (MAS) based supervisory architecture towards the design of reconfigurable automation systems; the reconfigured system will meet Quality of Service (QoS) requirements. In particular, in this paper the core of the supervisory architecture is presented. It is based on refreshing states and moving functionalities among the Programmable Logic controllers (PLCs). Besides, the agents negotiate if a PLC failure is detected.

关键词： Computer architecture Automation control systems Real-time systems Quality of service Availability Manufacturing systems

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Use of genetic algorithms for unmanned aerial systems path planning 11

Use of genetic algorithms for unmanned aerial systems path p...

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Decision Making and Soft Computing - 11th International Fuzzy Logic and Intelligent Technologies in Nuclear Science Conference, FLINS 2014

作者： Auñón, Pablo García Peñas, Matilde Santos System Engineering and Automatic Control UNED c/ Juan del Rosal s/n Madrid28040 Spain Computer Sciences University Complutense of Madrid C/ Profesor García Santesmases s/n Madrid28040 Spain

ISBN: (纸本)9789814619967

This paper shows a comparison of different methods based on genetic algorithms in order to find a computational cost efficient path planning strategy for unmanned aerial systems (UAS). For that purpose, two different population generations and three crossover operators are proposed, comparing the computational time they require and the paths found. Results prove that it is possible to design a reliable and fast evolutive algorithm, capable of finding a sub-optimal solution without too high computational cost for a complex problem such as minimizing the path between two points for rotorcrafts. © 2014, World Scientific Publishing Co. Pte Ltd. All rights reserved.

关键词： Genetic algorithms

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Feedforward and Feedback control of Dynamic systems

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IFAC Proceedings Volumes 2014年第3期47卷 7741-7748页

作者： Wuhua Hu Eduardo F. Camacho Lihua Xie School of Electrical and Electronic Engineering Nanyang Technological University Singapore Department of System Engineering and Automatic Control Escuela Superior de Ingenieros of the University of Sevilla Spain

Recently the control methods based on disturbance rejection have largely renewed our understanding of automatic control, especially the role of feedforward control. With the renewed understanding, this work presents a feedforward and feedback approach for control of general dynamic systems under a state tracking framework. This is realized by introducing a fictitious system model and employing a proper state and disturbance estimator. The resultant control scheme embodies a close cooperation between feedforward and feedback controls: Feedforward control rejects the general disturbance and embeds a reference state trajectory, whilst feedback control cancels the fictitious dynamics and enforces desired tracking error dynamics. A notable advantage of the approach is that control designs of linear and nonlinear systems can follow a common routine and the closed-loop stability is guaranteed under standard conditions.

关键词： Linear systems nonlinear systems feedforward control feedback control disturbance estimation model-free control active disturbance rejection control uncertainty and disturbance estimator pendulum

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Research and improvement of a model-driven technique

Research and improvement of a model-driven technique

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2014 International Conference on Computer Science and systems engineering（CSSE2014）

作者： M.Yue Y.C.Wang D.T.Zhang School of Reliability and System Engineering Beihang University Avic Xi'an Flight Automatic Control Research Institute

ISBN: (纸本)9781784660543

With the wide application of object-oriented software development technology and the requirement of software test automation, model-driven testing techniques are getting more and more attention in academia and the industry. Model-driven testing techniques can not only improve the test efficiency, but also improve the automation of test case generation, improve test failure identification, as well as to evaluate the test results effectively. Through summarizing and analyzing current model-driven testing methods, traditional testing methods don't have the mechanism to ensure the correctness of the software testing requirements model, and the optimization method based on a test case is not perfect. Therefore, this paper proposes an improvement of the model-driven testing technique, which combines a model check technique and mutation testing with a traditional modeldriven testing framework. The proposed technique can not only inherit the traditional advantages of model-driven testing methods, but also put forward a new testing technology according to the characteristics of the flight control system.

关键词： model-driven testing mutation testing model check

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A Model-based Approach for Achieving Available Automation systems

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IFAC Proceedings Volumes 2014年第3期47卷 3438-3443页

作者： R. Priego A. Armentia D. Orive E. Estévez M. Marcos University of the Basque Country Department of System Engineering and Automatics Bilbao 48013 Spain Universidad de Jaén Dept. Of Electronics and Automatic Control Jaen Spain

Nowadays automation systems are required to be flexible in order to cope with the ever changing requirements of the applications in terms of complexity, extensibility or dynamism. The use of reconfiguration techniques helps to meet these demanding requirements, but at the same time increase the complexity of the systems. This paper presents a supervisor architecture that allows maintaining the availability of a control system in spite of failures such as a node crash, by means of reconfigurations at the control level. To do this, the advantages that Model-Driven Development technology provides have been explored.

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Development of paraplegic quadriceps muscle model using ANN and ANFIS

Development of paraplegic quadriceps muscle model using ANN ...

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International Colloquium on Signal Processing & Its Applications, CSPA

作者： S. M. Salleh R. Jailani M. O. Tokhi Faculty of Electrical Engineering Universiti Teknologi MARA Malaysia Shah Alam Selangor Department of Automatic Control and System Engineering University of Sheffied United Kingdom

This paper presents the development of Quadriceps muscle model by using Artificial Neural Network (ANN) and Adaptive Neuro Fuzzy Inference system (ANFIS) based on Functional Electrical Stimulation (FES). The impacts of the output torque with different stimulation parameters (frequency, pulse width and sampling time) are investigated. These parameters will be used to develop the paraplegic muscle models. Muscle models developed are validated with the clinical data to evaluate the accuracy of the output torque predicted compare to the actual paraplegic muscle torque. From the study, ANN is found to be the most accurate model compare to ANFIS with the value of mean squared error of 0.3758. Both developed models in this study can be used in a various control strategies to control FES parameters during rehabilitation proses using FES.

关键词： Muscles Artificial neural networks Mathematical model Data models Force Biological system modeling Adaptation models

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On Applying MDE for Generating Reconfigurable Automation systems

On Applying MDE for Generating Reconfigurable Automation Sys...

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International Conference on Industrial Informatics

作者： Rafael Priego Aintzane Armentia Elisabet Estévéz Marga Marcos Dept. of Automatic Control and System Engineering ETSI Bilbao Basque Country University (UPV/EHU) Bilbao Spain Dept. Ingenieria Electrónica y Automática EPS de Jaén University of Jaén Jaén Spain

ISBN: (纸本)9781479966509

The continuous changes on the market and customer demands have forced modern automation systems to provide more strict Quality of Service (QoS) requirements such as load balance or full availability of the control system, among other characteristics. In order to cope with these demanding requirements, modern automation systems have started to incorporate novel design approaches which include reconfiguration mechanisms. Following this trend, this paper presents the use of MDE techniques and technologies, to help in the definition of the control system of reconfigurable automation plants. Directly from the model-based design, a model-based tool is derived that provides support for the generation of the elements that compose the reconfigurable control system.

关键词： MDE Availability Automation system Mechatronic components

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Recognition of Surfaces Based on Haptic Information Using Self-Organizing Maps

Recognition of Surfaces Based on Haptic Information Using Se...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Tomohiro Nakano Rolf Johansson Kouhei Ohnishi Graduate School of Science and Technology Keio University Department of Automatic Control Lund University Department of System Design Engineering Keio University

ISBN: (纸本)9781479940318

This paper proposes a new surface recognition method by a robot. Nowadays, demands for "Real World Haptics" are increasing. Tactile sensation which is acquired by rubbing motion is important for haptics. Therefore, surface recognition based on haptic information is focused in this paper. First, the surface sensing is needed to collect feature values. There are some researches which focus on sensing and analysis of surface tactile information by using sensors with robots. However, there are some disadvantages of using sensors such as signal noise. From that reason, this paper proposes getting surface haptic information without sensors at the tip of the robot. Second, a pattern recognition method needs to be applied for surface recognition. There are some pattern recognition methods. Self-organizing maps (SOM) is one of the solutions. SOM is able to summarize high dimensional data to low dimension with preserving the topological properties of data. SOM is suitable for multi-class recognition. From these reasons, this paper proposes the surface recognition based on haptic information using SOM. Multi class surface recognition is achieved by the proposed method. The validity of the proposed method was confirmed through 7 surface recognition experiments.

关键词： Vectors Haptic interfaces Force Robot sensing systems Feature extraction

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