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arXiv 2018年

作者： Bao, Rong-Jing Rong, Hai-Jun Yang, Zhi-Xin Chen, Badong State Key Laboratory for Strength and Vibration of Mechanical Structures Shaanxi Key Laboratory of Environment and Control for Flight Vehicle School of Aerospace Xi'an Jiaotong University Xi'an710049 China Department of Electromechanical Engineering Faculty of Science and Technology University of Macau 999078 China Institute of Artificial Intelligence and Robotics School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an710049 China

The health state assessment and remaining useful life (RUL) estimation play very important roles in prognostics and health management (PHM), owing to their abilities to reduce the maintenance and improve the safety of machines or equipment. However, they generally suffer from this problem of lacking prior knowledge to pre-define the exact failure thresholds for a machinery operating in a dynamic environment with a high level of uncertainty. In this case, dynamic thresholds depicted by the discrete states is a very attractive way to estimate the RUL of a dynamic machinery. Currently, there are only very few works considering the dynamic thresholds, and these studies adopted different algorithms to determine the discrete states and predict the continuous states separately, which largely increases the complexity of the learning process. In this paper, we propose a novel prognostics approach for RUL estimation of aero-engines with self-joint prediction of continuous and discrete states, wherein the prediction of continuous and discrete states are conducted simultaneously and dynamically within one learning framework. Copyright © 2018, The Authors. All rights reserved.

关键词： Aircraft engines

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Mixed-sensitivity design of a dynamic controller for systems pre-compensated by input shapers

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IFAC-PapersOnLine 2017年第1期50卷 1304-1309页

作者： Pilbauer D. Michiels W. Vyhlídal T. Hromčík M. Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A Heverlee B-3001 Belgium CIIRC - Czech Institute of Informatics Robotics and Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic M. Hromčík is with Deptartment of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic

We employ recent control design algorithms for delay systems to address the mixed sensitivity design of a dynamic controller for multiple degree of freedom systems interconnected with an inverse signal shaper. A delay based inverse shaper is included within a feedback loop in order to eliminate oscillatory modes due to an attached flexible substructure, which has been shown to be advantageous to inducing directly the filtering property by an appropriate controller design. Due to the presence of the inverse shaper, the closed loop dynamics become infinite dimensional. Furthermore we design fixed-order controllers, aiming at an easy implementation. As a consequence of these two features standard techniques from H-infinity control can no longer be used. We present a two-stage method, which firstly makes the closed-loop system asymptotically stable and, secondly, computes a low-order controller that minimizes the H-infinity norm of the weighted closed-loop transfer functions. The approach is grounded in recent methods for fixed-order H-infinity control of delay systems, and the delay-differential algebraic equations (DDAE) modelling and control framework. © 2017

关键词： H-infinity control inverse shapers spectral optimization time-delay

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How to Choose Electric Motor for Adjustable Speed Drive (ASD)

How to Choose Electric Motor for Adjustable Speed Drive (ASD...

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IEEE International Conference on Power Electronics and Motion control

作者： Slobodan Mircevski Dragan Vidanovski Sergey Ryvkin Faculty of Electrical Engineering and Information Technologies AD ELEM subsidiary REK Bitola Trapeznikov Institute of Control Sciences Russian Academy of Sciences

ISBN: (纸本)9781538641996

Electric motor drives according international standard IEC 60034-1 are divided in ten duty types, from S1 to S10. This paper has purpose to make analysis for the S8, S9 and S10 duty types, which are with adjustable speed drives (ASD). The goal of this paper is to discuss methods for speed control of induction motors (IM) and consumption of total electric energy. By more examples it is presented that consumption of non active energy is not negligible. So, for choice of motor for ASD is proposed additional diagram regarding consumption of non active energy.

关键词： Electric motors Variable speed drives heart atrium septum defect electrical energy Velocity control velocity modulation motor drives Motor Consumer Behavior Tuberculosis Choose

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The overlapping burden of the three leading causes of disability and death in sub-Saharan African children

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Nature Communications 2022年第1期13卷 1-14页

作者： Reiner, Robert C. Welgan, Catherine A. Troeger, Christopher E. Baumann, Mathew M. Weiss, Daniel J. Deshpande, Aniruddha Blacker, Brigette F. Miller-Petrie, Molly K. Earl, Lucas Bhatt, Samir Abolhassani, Hassan Abosetugn, Akine Eshete Abu-Gharbieh, Eman Adekanmbi, Victor Adetokunboh, Olatunji O. Aghaali, Mohammad Aji, Budi Alahdab, Fares Al-Aly, Ziyad Alhassan, Robert Kaba Ali, Saqib Alizade, Hesam Aljunid, Syed Mohamed Almasi-Hashiani, Amir Al-Mekhlafi, Hesham M. Altirkawi, Khalid A. Alvis-Guzman, Nelson Amare, Azmeraw T. Amini, Saeed Amugsi, Dickson A. Ancuceanu, Robert Andrei, Catalina Liliana Ansari, Fereshteh Anvari, Davood Appiah, Seth Christopher Yaw Arabloo, Jalal Aremu, Olatunde Atout, Maha Moh’d Wahbi Ausloos, Marcel Ausloos, Floriane Ayanore, Martin Amogre Aynalem, Yared Asmare Azene, Zelalem Nigussie Badawi, Alaa Baig, Atif Amin Banach, Maciej Bedi, Neeraj Bhagavathula, Akshaya Srikanth Bhandari, Dinesh Bhardwaj, Nikha Bhardwaj, Pankaj Bhattacharyya, Krittika Bhutta, Zulfiqar A. Bijani, Ali Birhanu, Tesega Tesega Mengistu Bitew, Zebenay Workneh Boloor, Archith Brady, Oliver J. Butt, Zahid A. Car, Josip Carvalho, Felix Casey, Daniel C. Chattu, Vijay Kumar Chowdhury, Mohiuddin Ahsanul Kabir Chu, Dinh-Toi Coelho, Camila H. Cook, Aubrey J. Damiani, Giovanni Daoud, Farah Gela, Jiregna Darega Darwish, Amira Hamed Daryani, Ahmad Das, Jai K. Davis Weaver, Nicole Deribe, Kebede Desalew, Assefa Dharmaratne, Samath Dhamminda Dianatinasab, Mostafa Diaz, Daniel Djalalinia, Shirin Dorostkar, Fariba Dubljanin, Eleonora Duko, Bereket Dwyer-Lindgren, Laura Effiong, Andem El Sayed Zaki, Maysaa El Tantawi, Maha Enany, Shymaa Fattahi, Nazir Feigin, Valery L. Fernandes, Eduarda Ferrara, Pietro Fischer, Florian Foigt, Nataliya A. Folayan, Morenike Oluwatoyin Foroutan, Masoud Frostad, Joseph Jon Fukumoto, Takeshi Gaidhane, Abhay Motiramji Gebrekrstos, Hailemikael Gebrekidan G. K. Gebremeskel, Leake Gebreslassie, Assefa Ayalew Gething, Peter W. Gezae, Kebede Embaye Ghadiri, Keyghobad Ghashghaee, Ahmad Golechha, Mahaveer Gubar Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Malaria Atlas Project University of Oxford Oxford United Kingdom Imperial College London London United Kingdom Department of Laboratory Medicine Karolinska University Hospital Huddinge Sweden Research Center for Immunodeficiencies Tehran University of Medical Sciences Tehran Iran Department of Public Health Debre Berhan University Debre Berhan Ethiopia Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Population Health Sciences King’s College London London United Kingdom Centre of Excellence for Epidemiological Modelling and Analysis Stellenbosch University Stellenbosch South Africa Department of Global Health Stellenbosch University Cape Town South Africa Department of Epidemiology and Biostatistics Qom University of Medical Sciences Qom Iran Faculty of Medicine and Public Health Jenderal Soedirman University Purwokerto Indonesia Mayo Evidence-based Practice Center Mayo Clinic Foundation for Medical Education and Research Rochester MN United States John T. Milliken Department of Internal Medicine Washington University in St. Louis St. Louis MO United States Clinical Epidemiology Center Department of Veterans Affairs St Louis MO United States Institute of Health Research University of Health and Allied Sciences Ho Ghana Department of Information Systems College of Economics and Political Science Sultan Qaboos University Muscat Oman Infectious and Tropical Disease Research Center Hormozgan University of Medical Sciences Bandar Abbas Iran Department of Health Policy and Management Kuwait University Safat Kuwait International Centre for Casemix and Clinical Coding National University of Malaysia Bandar Tun Razak Malaysia Department of Epidemiology Arak University of Medical Sciences Arak Iran Medical Research Center

Despite substantial declines since 2000, lower respiratory infections (LRIs), diarrhoeal diseases, and malaria remain among the leading causes of nonfatal and fatal disease burden for children under 5 years of age (under 5), primarily in sub-Saharan Africa (SSA). The spatial burden of each of these diseases has been estimated subnationally across SSA, yet no prior analyses have examined the pattern of their combined burden. Here we synthesise subnational estimates of the burden of LRIs, diarrhoea, and malaria in children under-5 from 2000 to 2017 for 43 sub-Saharan countries. Some units faced a relatively equal burden from each of the three diseases, while others had one or two dominant sources of unit-level burden, with no consistent pattern geographically across the entire subcontinent. Using a subnational counterfactual analysis, we show that nearly 300 million DALYs could have been averted since 2000 by raising all units to their national average. Our findings are directly relevant for decision-makers in determining which and targeting where the most appropriate interventions are for increasing child survival. © 2022, The Author(s).

关键词： Biogeography Epidemiology Infectious diseases Malaria

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3D Environment Modeling with Height Dimension Reduction and Path Planning for UAV

3D Environment Modeling with Height Dimension Reduction and ...

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2017 9th International Conference on Modelling, Identification and control (ICMIC 2017)

作者： Zhe Lv Liying Yang Yuqing He Zhong Liu Zhonghua Han the State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of Sciences the Faculty of Information and Control Engineering Shenyang Jianzhu University Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang Institute of Automation Chinese Academy of Sciences

In this paper,an environment modeling method with height dimension reduction for unmanned aerial vehicle(UAV) path planning is *** on the traditional grid method,a plane being vertical to yz-plane and including the start point and end point is considered in this *** the height of this plane and obstacles,the environment model could be set up through re-dividing the plane by grid *** idea reduces the dimension of the 3 D environment model and ignores the obstacles which are lower than the flying height of *** this way,the accuracy of the proposed environment model method could be increased,and the efficiency of the path planning algorithm could be ensured *** experiment shows the effectiveness of this environment modeling method by applying A* algorithm for path planning.

关键词： Environment modeling Path planning Grid method A* algorithm

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Gaussian pedestrian proxemics model with social force for service robot navigation in dynamic environment 17th

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17th International Conference on Asia Simulation, AsiaSim 2017

作者： Chik, Sheng Fei Yeong, Che Fai Su, Eileen Lee Ming Lim, Thol Yong Duan, Feng Tan, Jeffrey Too Chuan Tan, Ping Hua Chin, Patrick Jun Hua Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia Centre for Artificial Intelligence and Robotics Universiti Teknologi Malaysia Johor Bahru Malaysia Malaysia Japan Institute of Technolgy Universiti Teknologi Malaysia Johor Bahru Malaysia Department of Automation College of Computer and Control Engineering Nankai University Tianjin China Institute of Industrial Science The University of Tokyo Tokyo Japan DF Automation and Robotics Sdn. Bhd Skudai Malaysia

ISBN: (纸本)9789811064623

Pedestrian motion behaves stochastically, causing difficulties in modelling the appropriate proxemics for effective and efficient service robot navigation. Intruding the pedestrian social space can affect the social acceptance of a service robot. In this paper, a new proxemics model, Social-Force Gaussian Pedestrian Proxemics Model is presented to model the pedestrian social space and to improve the service robot navigation in dynamic human environment. This model was simulated and validated in a pedestrian simulator with both low and high pedestrian density environments. Results showed that the proposed model (i) improved proxemics representation of pedestrians, (ii) enhanced the robot performance in respecting the social norm and (iii) increased the efficiency in achieving a given task. This paper also presents the methods for parameter selections for the model without the requirement of complex tuning. © Springer Nature Singapore Pte Ltd. 2017.

关键词： Mobile robots

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Research on the tip-carbon nanotube interaction model using molecular dynamics simulation

Research on the tip-carbon nanotube interaction model using ...

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2017 9th International Conference on Modelling, Identification and control (ICMIC 2017)

作者： Shuai Yuan Xiao Yao Zhihua Liu Jingang Shi Jingyi Xing Information & Control Engineering Faculty Shenyang Jianzhu University State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of Sciences

In atomic force microscopy(AFM) based carbon nanotubes(CNTs) manipulation,the interaction force between AFM tip and CNT has a significant effect on the operation *** this paper,we propose to simulate the contact model between AFM tip and carbon nanotube by using molecular dynamics *** the proposed framework,different contact process(under different tip shapes,tip sizes,and contact positions) are also *** effectiveness of this proposed simulation is verified by comparing the simulation result with the literature *** study explores atomic scale mechanical changes in the AFM tip-CNT interaction,providing a more accurate mechanical basis for AFM based CNT manipulation.

关键词： AFM carbon nanotube interaction force molecular dynamics simulation

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Search-based optimal motion planning for automated driving

arXiv

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arXiv 2018年

作者： Ajanovic, Zlatan Lacevic, Bakir Shyrokau, Barys Stolz, Michael Horn, Martin Virtual Vehicle Research Center Inffeldgasse 21a Graz8010 Austria Faculty of Electrical Engineering University of Sarajevo Sarajevo Bosnia Herzegovina7100 Bosnia and Herzegovina Department of Cognitive Robotics Delft University of Technology Mekelweg 2 Delft2628 Netherlands Institute of Automation and Control at Graz University of Technology Inffeldgasse 21b Graz8010 Austria

This paper presents a framework for fast and robust motion planning designed to facilitate automated driving. The framework allows for real-time computation even for horizons of several hundred meters and thus enabling automated driving in urban conditions. This is achieved through several features. Firstly, a convenient geometrical representation of both the search space and driving constraints enables the use of classical path planning approach. Thus, a wide variety of constraints can be tackled simultaneously (other vehicles, traffic lights, etc.). Secondly, an exact cost-to-go map, obtained by solving a relaxed problem, is then used by A∗-based algorithm with model predictive flavour in order to compute the optimal motion trajectory. The algorithm takes into account both distance and time horizons. The approach is validated within a simulation study with realistic traffic scenarios. We demonstrate the capability of the algorithm to devise plans both in fast and slow driving conditions, even when full stop is required. Copyright © 2018, The Authors. All rights reserved.

关键词： Motion planning

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Object handover prediction using gaussian processes clustered with trajectory classification

arXiv

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arXiv 2017年

作者： Lang, Muriel Endo, Satoshi Dunkley, Oliver Hirche, Sandra Institute for Information-Oriented Control Faculty of Electrical Engineering and Information Technology Technische Universität München MunichD-80290 Singapore

A robotic system which approximates the user intention and appropriate complimentary motion is critical for successful human-robot interaction. Here, we demonstrate robustness of the Gaussian Process (GP) clustered with a stochastic classification technique for trajectory prediction using an object handover scenario. By parametrising real 6D hand movements during human-human object handover using dual quaternions, variations of handover configurations were classified in real-time and then the remaining hand trajectory was predicted using the GP. The results highlights that our method can classify the handover configuration at an average of 43.4% of the trajectory and the final hand configuration can be predicted within the normal variation of human movement. In conclusion, we demonstrate that GPs combined with a stochastic classification technique is a robust tool for proactively estimating human motions for human-robot interaction. Copyright © 2017, The Authors. All rights reserved.

关键词： Human robot interaction

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Automatic generation of bounds for polynomial systems with application to the lorenz system

arXiv

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arXiv 2017年

作者： Röbenack, Klaus Voßwinkel, Rick Richter, Hendrik Technische Universität Dresden Faculty of Electrical and Computer Engineering Institute of Control Theory Dresden01062 Germany Htwk Leipzig University of Applied Sciences Faculty of Electrical Engineering and Information Technology Leipzig04107 Germany

This study covers an analytical approach to calculate positive invariant sets of dynamical systems. Using Lyapunov techniques and quantifier elimination methods, an automatic procedure for determining bounds in the state space as an enclosure of attractors is proposed. The available software tools permit an algorithmizable process, which normally requires a good insight into the systems dynamics and experience. As a result we get an estimation of the attractor, whose conservatism only results from the initial choice of the Lyapunov candidate function. The proposed approach is illustrated on the well-known Lorenz system.34D45, 37C70, 37C75 Copyright © 2017, The Authors. All rights reserved.

关键词： Dynamical systems

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