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检索条件"任意字段=International Conference on Complex Systems: Control and Modeling Problems"

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Formation control for multi-domain autonomous vehicles based on dual quaternions

Formation control for multi-domain autonomous vehicles based...

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2017 international conference on Unmanned Aircraft systems, ICUAS 2017

作者： Mas, Ignacio Moreno, Patricio Giribet, Juan Barzi, Diego Valentino Argentina Argentina Facultad de Ingeniería Universidad de Buenos Aires Argentina Instituto Argentino de Matemática Alberto Calderón CONICET Argentina

ISBN: (纸本)9781509044948

Unmanned networked multirobot systems have the potential to accomplish complex field tasks with minimum human intervention. Motion coordination of vehicles that operate in different domains (land, sea, air) is one of the problems that need to be addressed to achieve such a goal. This article presents a representation method based on dual quaternions for leader-follower formation control architectures. This representation offers the most compact and computationally efficient screw transformation formalism and can be used to describe rigid body motions because they simultaneously describe positions and orientations with only eight parameters. A controller in dual quaternion formation space is proposed and analyzed. Computer simulation results and experimental tests applied to the task of escorting an UGV with UAVs are shown to verify the functionality of the proposed system. © 2017 IEEE.

关键词： Autonomous vehicles

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complex modeling OF VVER-1000 USING MCU-ATHLET-FLOWVISION 7

COMPLEX MODELING OF VVER-1000 USING MCU-ATHLET-FLOWVISION

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7th international conference on Coupled problems in Science and Engineering (COUPLED problems)

作者： Bahdanovich, R. B. Bogdanova, E., V Gamtsemlidze, I. D. Nikonov, S. P. Tikhomirov, G., V Natl Res Nucl Univ MEPhI Moscow Engn Phys Inst Dept Theoret & Expt Phys Nucl Reactors Kashirskoe Shosse 31 Moscow Russia

ISBN: (纸本)9788494690921

Nowadays modelling of physical processes is very spread in all fields of physics. It is possible because of high capacity of computing powers and capability of parallel computing. We can observe a trend to more detailed description of simulated systems and growth of calculation schemes complexity. Scientists understand that the feedback of related physical processes occurring simultaneously could have significant impact on the results of modelling and should be solved in the scope of multiphysics. That kind of problems exists in reactor physics. It is vital to perform complex modelling of processes occurring in a fuel core of a nuclear reactor, especially during the design of the next generation nuclear power plants. It is not possible to justify safety of the power reactor without complex calculations. In this paper, we proposed a test case for precise coupled neutronics-thermal hydraulics calculation of VVER-1000 reactor using MCU, ATHLET and FLOWVISION codes. MCU is a general-purpose stochastic neutron-physical code based on the Monte-Carlo method and characterized by large time of calculation, as well as CFD codes. Because of that system code ATHLET was used as a fast thermal hydraulic solver in the iterative scheme. In the end of the calculation we propose to use CFD code FLOWVISION in order to enhance the precision and verify CFD model for the further complication of the geometry. The obtained results showed oscillations of power and fuel temperature profiles. Detailed discussion is given in the article. It is assumed that the test case will be used for simulation of VVER-1000 reactor in accident related regimes and for codes cross verification. The obtained experience and developed coupling program (PERL script) will be used to create coupled schemes for complex modelling of generation IV nuclear reactors involving different computer codes.

关键词： Monte-Carlo Coupled problems Multiphysics problems Engineering Computer modeling Iteration scheme Power oscillations

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About probabilistic risk prediction for system engineering. Models, applications, effects 5

About probabilistic risk prediction for system engineering. ...

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5th international conference on Actual problems of System and Software Engineering, APSSE 2017

作者： Kostogryzov, Andrey Federal Research Center Computer Science and Control of the Russian Academy of Sciences Main Scientific Research Test Center of the Russian Ministry of Defence Moscow Russia

The paper is concerned with the development and application of the original probabilistic models of risks prediction for complex systems. The practical examples demonstrate possibilities to decide the different proble... 详细信息

关键词： systems engineering

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Designed & Comparison of Reliability Analysis in 6T & 5T SRAM Cell

Designed & Comparison of Reliability Analysis in 6T & 5T SRA...

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international conference on Devices, Circuits and systems (ICDCS)

作者： Seelam Vasavi Sai Viswanada Prabhu Deva Kumar Shyam Akashe The NorthCap University Gurgaon Haryana IN ITM University Gwalior

Temporary reduction VLSI IC silicon technology is an important factor for the scale of reliability problems. The instability of the Negative Bias Temperature Instability (NBTI), Positive Bias Temperature Instability (PBTI), Hot-Carrier Injection (HCI) and different Models are particularly severe problem during operation of the electronic circuit. This document describes the impact mechanism and another NBTI, PBTI& HCI distribution coefficient that degrades NBTI, PBTI & HCI performance. The expression analysis of the Reliability models is based on various characteristics of the solution spread of the model developed by the researcher. For NBTI, PBTI, HCI and Models performance of 6T and 5T SRAM, this method can be used to counteract the effect of PMOS NBTI degradation, NMOS PBTI degradation and HCI on both which is described in more detail below.. Certain manufacturing processes can cause destruction inactivity leading to short circuit life. In research for NBTI PBTI and HCI degradation on 6T and 5T SRAM, the draft strategy provides the effect of improving the performance of 6T and 5T SRAM. This 6T and 5T SRAM is subject to temperature and pressure stress conditions, in particular degradation appears in the device parameters. In this paper we found the degradation of 6T and 5T SRAM up to 10 years and compared the results to find effectiveness in both SRAM's. The simulation work is done using 45nm technology in virtuoso cadence.

关键词： Integrated circuit modeling Random access memory Negative bias temperature instability Thermal variables control Human computer interaction MOSFET

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Noise Observer Based Sliding Mode control for Time-Varying Delay systems

Noise Observer Based Sliding Mode Control for Time-Varying D...

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international conference on Life System modeling and Simulation (LSMS) / international conference on Intelligent Computing for Sustainable Energy and Environment (ICSEE)

作者： Cui, Yanliang Shi, Guangtian Xu, Lanlan Zhang, Xiaoan Li, Xue Lanzhou Jiaotong Univ Sch Mech Engn Lanzhou 730070 Gansu Peoples R China Lanzhou Jiaotong Univ Sch Civil Engn Lanzhou 730070 Gansu Peoples R China

ISBN: (纸本)9789811063732;9789811063725

This paper investigates the control issue for noise-perturbed time-varying delay systems. A novel state and noise observer (SNO) based sliding mode control (SMC) law is designed, meanwhile, a weighted energy-to-energy performance (WEEP) is proposed for reducing the negative influence of the observer-induced complex exogenous noises. By a novel free-weight matrix method, the stability condition is conveniently obtained. By the proposed method, the exponential stability of close-loop system can be guaranteed while a WEEP is simultaneously achieved, moreover, the exponential convergence rate can be pre-specified. Numerical examples are provided to demonstrate the effectiveness of the proposed methods.

关键词： Noise observer Integral sliding mode control Time-varying delay Energy-to-energy performance

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A Gaussian Process Approach for Extended Object Tracking with Random Shapes and for Dealing with Intractable Likelihoods 22

A Gaussian Process Approach for Extended Object Tracking wit...

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2017 22nd international conference on Digital Signal Processing (DSP)

作者： Aftab, Waqas De Freitas, Allan Arvaneh, Mahnaz Mihaylova, Lyudmila Univ Sheffield Dept Automat Control & Syst Engn Sheffield S1 3JD S Yorkshire England

ISBN: (纸本)9781538618950

Tracking of arbitrarily shaped extended objects is a complex task due to the intractable analytical expression of measurement to object associations. The presence of sensor noise and clutter worsens the situation. Although a significant work has been done on the extended object tracking (EOT) problems, most of the developed methods are restricted by assumptions on the shape of the object such as stick, circle, or other axis-symmetric properties etc. This paper proposes a novel Gaussian process approach for tracking an extended object using a convolution particle filter (CPF). The new approach is shown to track irregularly shaped objects efficiently in presence of measurement noise and clutter. The mean recall and precision values for the shape, calculated by the proposed method on simulated data are around 0.9, respectively, by using 1000 particles.

关键词： Kernel Shape Atmospheric measurements Particle measurements Kinematics Time measurement Target tracking

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Design of Universal PCIe Interface Module Based on Vs

Design of Universal PCIe Interface Module Based on Vs

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2018 2nd international conference on Aerospace Technology, Communications and Energy systems (ATCES 2018)

作者： Tingting Du Qingzhong Jia Key Ministry Education Laboratory of Dynamics and Control of Flight Vehicle Beijing Institute of TechnologyBIT

Due to wide variety of interfaces and complex bus protocols, the general detection system has problems such as high bus usage threshold and poor portability of the host computer software, which greatly reduces the user's development efficiency of the detection system. In response to the issue, this paper designs a universal interface module for PCIe based on vs. The module provides unified functional interfaces, through which the data transmission of all bus devices can be easily and reliably controlled. In this paper, the design idea of the universal interface module is explained. Finally, the module is illustrated and the result shows that the designed scheme is feasible.

关键词： Design of Universal PCIe Interface Module Based on Vs

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Rapid State Machine Assembly for Modular Robot control using Meta-Scripting, Templating and Code Generation 17

Rapid State Machine Assembly for Modular Robot Control using...

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IEEE-RAS 17th international conference on Humanoid Robotics (Humanoids)

作者： Ridge, Barry Gaspar, Timotej Ude, Ales Jozef Stefan Inst Humanoid & Cognit Robot Lab Dept Automat Biocybernet & Robot Jamova 39 Ljubljana 1000 Slovenia

ISBN: (纸本)9781538646786

As robotic systems have become more and more complex and difficult to manage, various software architectures, libraries and programming paradigms have been introduced aimed at high-level control and integration of their constituent parts. The Robot Operating System (ROS) has, for many, become the de facto software framework for communication standardisation and hardware interface abstraction, and various packages within its ecosystem have come to the fore as being reliable design choices for dictating control flow. ROS-based software packages that use state machines as their core methodology to bridge the gap between low-level imperative task scripting and higher-level task planning have proven particularly popular. However, while they provide much in terms of power and flexibility, their overall task-level simplicity can often be obfuscated at the script-level by boilerplate code, intricate structure and lack of code reuse between state machine prototypes. In this paper, we aim to address this deficit by proposing a code generation, templating and meta-scripting methodology for state machine assembly, as well as an accompanying application programming interface (API), for the rapid, modular development of robot control programs. The API has been developed to function effectively as either a front-end for concise scripting or a back-end for code generation for visual programming systems. Its capabilities are demonstrated in an experiment using a simulated humanoid robot platform.

关键词： Libraries Programming Generators Load modeling Robot sensing systems

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6th Computer Science On-line conference, CSOC 2017

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6th Computer Science On-line conference, CSOC 2017

ISBN: (纸本)9783319572635

The proceedings contain 43 papers. The special focus in this conference is on Cybernetics and Mathematics Applications in Intelligent systems. The topics include: Cost-effective computational modeling of fault tolerant optimization of FinFET -based SRAM cells;application of risk theory approach to fuzzy abduction;enhanced TDS stability analysis method via characteristic quasipolynomial polynomization;dissipativity of multistep Runge–Kutta methods for nonlinear neutral delay integro differential equations with constrained grid;exploiting model continuity in agent-based cyber-physical systems;design of processor in memory with RISC-modified memory-centric architecture;a novel modeling of combinatorial approach for radiological image compression;torque characteristics of antagonistic pneumatic muscle actuator with an oval cam;adaptive control system of a robot manipulator based on a decentralized position-dependent PID controller;possibilities of process modeling in pedagogical cybernetics based on control system-theory approaches;calibration of low-cost three axis magnetometer with differential evolution;the technique of multi-criteria decision-making in the study of semi-structured problems;the parameters list for multihop wireless networks cross layer routing metric;control theory application to complex technical objects scheduling problem solving;protective correction of the flow in mechanical transport system;control of time-delay systems with parametric uncertainty via two feedback controllers;large networks of diameter two based on cayley graphs;simulation of a single component system using the trajectories method taking into account the scheduling preventive maintenance and the experience of building cognitive user interfaces of multidomain information systems based on the mental model of users.

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Modelling access control for CIM based graph model in Smart Grids

Modelling access control for CIM based graph model in Smart ...

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international conference on Signal Processing and Information Security (ICSPIS)

作者： Ivana Kovačević Aleksandar Erdeljan Miroslav Zarić Nikola Dalčeković Imre Lendak Faculty of Technical Sciences University of Novi Sad Novi Sad Serbia

ISBN: (纸本)9781538665824;9781728102573

Consumption of electricity has grown, and that tendency will continue according to Energy Information Administration (EIA). Most modern distribution networks, evolving into Smart Grids, are managed through sophisticated software, such as advanced distribution management systems (ADMS). Their operations are based on gathering, analysis and transformation of data coming from the different devices in distribution network. Data volume in Smart Grids is increasing rapidly. Therefore, handling that growing amount of data may pose significant challenges for relational databases in the future, as they may struggle with demand for execution of complex queries. In some cases, like in modeling power system network, the data model is naturally represented by a graph, hence graph databases could provide viable, more efficient alternative. The paper is proposing an approach to include sensitive data access permissions in a graph oriented database - enabling us to decide who can access the sensitive data and who cannot. We have performed analysis on security controls to limit the access to personal data using a realistic data model derived from an existing network model of power distribution utility based in Europe, but described approach is also applicable to other sensitive data. We concluded that the proposed approach would provide ability for implementing access management security controls, while each approach would differently affect the levels of overall system performances.

关键词： Data models Access control Smart grids Relational databases Ciphers

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