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

共 12182 条记录，以下是4931-4940 订阅

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Ontological Framework for Constructing Hybrid Prognoses and Risk Assessment of Critical Conditions of Patients

Ontological Framework for Constructing Hybrid Prognoses and ...

引用

2023 international Russian Smart Industry conference, SmartIndustryCon 2023

作者： Gribova, Valeriya Shalfeeva, Elena Institute of Automation and Control Processes FEB RAS Vladivostok Russia Far Eastern Federal University Vladivostok Russia

ISBN: (纸本)9781665464291

The paper describes a cloud-based ontological framework for designing hybrid cloud software systems and services for predicting patient conditions and assessing the risk of critical conditions and events. The proposed solution is based on integrated semantic models for the formation of knowledge, documents, hypotheses and reasoned decisions in medicine. These complexes combine several types of sources for the formation of knowledge bases and various methods and approaches to solving such problems (mathematical modeling, machine learning, and knowledge engineering). For a group of diseases or a section of medicine, knowledge bases are formed about diseases that have passed the verification procedure or that doctors are ready to trust a priori. The means of declarative description of the rules of interpretation of knowledge about the dynamics of the development of diseases and numerical values from predictive models are provided. © 2023 IEEE.

关键词： Decision support systems

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Optimization of distributed inertial sensors system for measuring the motion parameters of flexible construction 14

Optimization of distributed inertial sensors system for meas...

引用

14th Saint Petersburg international conference on Integrated Navigation systems, ICINS 2007

作者： Brodsky, S.A. Nebylov, A.V. Panferov, A.I. International Institute for Advanced Aerospace Technologies State University of Aerospace Instrumentation Bolshaya Morskaya 67 Saint-Petersburg Russia

ISBN: (纸本)9785900780672

Solving the problem of measuring the parameters of movement of the complicated flexible constructions is suggested. Choosing setting points of inertial sensors and the processing techniques of the measurements is optimized, allowing the evaluation of existing elastic strains. The problem is solved step-by-step. In the beginning of investigation there may not be present a detailed information on construction, properties of substances of details, methods of their machining and joint. In this case it is suggested to use algorithm of account of shapes and angles of the elastic deformation, based on outcomes of full-scale, model or computer experiment. On the basis of this information advisories on installation of sensors on a construction are stated. Algorithms of selection of the information on evolution of separate modes of elastic oscillations in service are offered. Summation of these modes allows evaluating stress-strain curves of construction in real time. As an example outcomes of probes of strains for a complex aerospace construction are given.

关键词： Elastic construction Experimental data processing Inertial sensors Optimization

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control Strategy for Islanded DC Distribution Network with High PV Penetration 10

Control Strategy for Islanded DC Distribution Network with H...

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10th international conference on Power and Energy systems, ICPES 2020

作者： Liu, Hongzhi Li, Qing Han, Pingping Li, Yan Fan, Yiwen Tian, Xinshou China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China Hefei University of Technology School of Electrical Engineering and Automation Hefei China

ISBN: (纸本)9781665404945

The extensive emerging of distributed PV power generation and DC loads accelerates the development of DC distribution network. In a DC distribution network, the intermittence of generation of distributed PV causes power fluctuation and the relatively large power load ratio weakens the PV utilization rate. In this paper, a control strategy for DC distribution network is proposed to solve the problems. The DC distribution network is connected to the main AC distribution network via a voltage source converter (VSC), and a battery storage system is employed to smooth the power fluctuation. In the grid-connected operation, the battery stabilizes the voltage of the DC distribution network while the VSC outputs constant power to the AC network. In the islanded operation, the battery controls the DC network voltage according to its state of charge (SOC) level. A new load shedding strategy is developed based on the DC voltage level to assure the power supply to the critical loads as long as possible. PSCAD/EMTDC is used for modeling and simulation. The simulation results verified the effectiveness of the proposed control strategy. © 2020 IEEE.

关键词： Charging (batteries)

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In-network Stochastic Consensus for WSN Surveillance Applications 9

In-network Stochastic Consensus for WSN Surveillance Applica...

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9th international conference on Electronics, Computers and Artificial Intelligence (ECAI)

作者： Dragana, Cristian Mihai, Viorel Stamatescu, Grigore Popescu, Dan Univ Politehn Bucuresti Dept Automat Control & Ind Informat Bucharest 060042 Romania

ISBN: (纸本)9781509064588

Surveillance applications require reliable monitoring system architectures and cost-efficient in-network data processing mechanisms able to provide effective information extraction for event tracking. Wireless Sensor Networks (WSNs) appear to be the most suitable technology due to some well known benefits and the rapid development of embedded devices. Current research is mostly focused on improving and developing new decentralized sensor fusion schemes able to overcome the limitations introduced by the battery operated sensor nodes, but most of the time evaluating the proposed algorithms is performed with a serious lack of precise channel modeling. To close this gap, we provide a stochastic consensus implementation for lossy wireless networks comprising fixed and mobile sensor nodes, as a heterogeneous surveillance system based on ground sensor nodes and UAVs (Unmanned Aerial Vehicles). We developed a simulation framework tailored for fixed and mobile sensor nodes and we are able to evaluate the performance of consensus algorithms from a comparative standpoint, considering deterministic and probabilistic packet propagation models described by common models such as Free Space and Nakagami models. In this paper, we consider a complex in-network adaptive estimation using the distributed least-mean square algorithm tailored for WSN. We perform a mean-square error (MSE) performance analysis for both deterministic and probabilistic propagation models.

关键词： consensus WSN stochastic monitoring systems probabilistic models

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Maximum power point tracking control of photovoltaic system using neural network

Maximum power point tracking control of photovoltaic system ...

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2010 international conference on Electrical Machines and systems, ICEMS2010

作者： Jung, Woo Baek Jae, Sub Ko Jung, Sik Choi Sung, Jun Kang Dong, Hwa Chung Dept. of Electric Control Engineering Sunchon National University South Korea

This paper presents an application of a Neural Network for maximum power point tracking(MPPT) of PV supplied DC motor. A variation of solar radiation is most important factor in the MPPT of PV system. That is nonlinear, aperiodic and complicated. NN was widely used due to easily solving a complex math problem. The paper consists of solar radiation source, DC-DC converter, DC motor and load. NN algorithm applies to DC-DC converter through an adaptive control of neural network and calculates converter-chopping ratio using an adaptive control of NN. The results of an adaptive control of NN compared with the results of converter-chopping ratio which are calculated mathematical modeling and evaluate the proposed algorithm. The experimental data show that an adequacy of the algorithm was established through the compared data.

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international Joint conference on 9th international conference on Soft Computing Models in Industrial and Environmental Applications, SOCO 2014 with 7th international conference on Computational Intelligence in Security for Information systems, CISIS 2014 and 5th international conference on EUropean Transnational Education, ICEUTE 2014

International Joint Conference on 9th International Conferen...

引用

international Joint conference on 9th international conference on Soft Computing Models in Industrial and Environmental Applications, SOCO 2014 with 7th international conference on Computational Intelligence in Security for Information systems, CISIS 2014 and 5th international conference on EUropean Transnational Education, ICEUTE 2014

ISBN: (纸本)9783319079943

The proceedings contain 58 papers. The special focus in this conference is on Evolutionary computation and optimization, Intelligent systems, Applications, Classification and clustering methods, Soft computing methods in manufacturing and management systems, Applications of intelligent methods for security and Infrastructure and network security. The topics include: A strength pareto approach and a novel formulation in the reporting cells planning;a new iterative approach for finding nearest neighbors using space-filling curves for fast graphs visualization;classification via nearest prototype classifier utilizing artificial bee colony on CUDA;a proposal of good practice in the formulation and comparison of meta-heuristics for solving routing problems;soft computing meta models for the failure prediction of T-stub bolted connections;an overall performance comparative of GA-PARSIMONY methodology with regression algorithms;evolutionary simulation of complex networks’ structures with specific functional properties;inventory routing problem with stochastic demand and lead time;hybrid evolutionary workflow scheduling algorithm for dynamic heterogeneous distributed computational environment;a bi-objective harmony search approach for deploying cost-effective multi-hop communications over large-area wildfires;hyperspectral image analysis based on quad tree decomposition;gaussian process-based inferential control system and effect of initial conditioning of reinforcement learning agents on feedback control tasks over continuous state and action spaces.

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ASME 2012 11th Biennial conference on Engineering systems Design and Analysis, ESDA 2012

ASME 2012 11th Biennial Conference on Engineering Systems De...

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ASME 2012 11th Biennial conference on Engineering systems Design and Analysis, ESDA 2012

ISBN: (纸本)9780791844861

The proceedings contain 386 papers and 1 PowerPoint presentation. The topics discussed include: crack initiation and propagation as part of engineering design;heavy truck 5th wheel modeling techniques in finite element and their effect on stress distribution;modelling local dynamic pressure within inflatable sports balls;first steps in the space separated representation of models defined in complex domains;numerical simulation on the flow pattern in forebay of pumping station;a numerical simulation approach for atmospheric pollution evolution at urban scale to help traffic control decision making;fractal orifices for flowmetering;numerical implementation of higher-order homogenization problems and computation of gradient elasticity coefficients;micromechanical based simulation and experimental approaches in the thermal conductivities assessment of hybrid polymeric composite materials;laser sintering process analysis: application to chromium-cobalt alloys for dental prosthesis production;and knowledge-based automated programming of welding robots for lot-size one products.

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Synthesis of UAV Motion control Algorithms along a Given Trajectory

Synthesis of UAV Motion Control Algorithms along a Given Tra...

引用

2022 international Russian Automation conference, RusAutoCon 2022

作者： Kreerenko, O.D. Moscow Aviation Institute Moscow Russia

ISBN: (数字)9781665466554

ISBN: (纸本)9781665466554

Unmanned aerial vehicles (UAVs) are increasingly entering various spheres of human life. They are used in agriculture, to protect forests from fires, to ensure road safety, to monitor the condition of oil and gas pipelines, and so on. The scope of the UAV is constantly expanding. The range of tasks they solve becomes more complicated. This leads to the complication of the UAV as a control object (CO). Therefore, the control systems of such objects are also facing more and more serious problems, the requirements for accuracy and speed of their functioning are becoming more stringent. Thus, for the synthesis of UAV control algorithms, new approaches are required that will allow solving the problem in a fairly general form based on the mathematical model of the object, taking into account the natural physical properties of controlled processes. Such an approach is the synergetic approach in control theory. In this paper, we consider the procedure for the synergistic synthesis of UAV control algorithms when moving along a predetermined trajectory at a given speed. When modeling transient processes, the dynamic properties of the resulting closed system 'UAV - autopilot' were investigated. It is shown that the synthesized control algorithms ensure the asymptotic stability of a closed nonlinear system in the entire admissible range of phase coordinates. The exact fulfillment of the goals of management has been demonstrated. In addition, the influence of external disturbances on the functioning of the closed system 'UAV-autopilot' is considered. © 2022 IEEE.

关键词： Asymptotic stability

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MODAL PARAMETER IDENTIFICATION OF controlLED FLEXIBLE SPACE STRUCTURES 2

MODAL PARAMETER IDENTIFICATION OF CONTROLLED FLEXIBLE SPACE ...

引用

2nd European conference on Smart Structures and Materials

作者： KASAI, T KOMATSU, K SANO, M NATL AEROSP LAB CHOFUTOKYO 182JAPAN

ISBN: (纸本)0819417009

A method for using the extended Kalman filter to identify the modal parameters of vibration controlled structures has been developed and demonstrated. The closed-loop structural vibration system is excited by a known of unknown excitation signal and the resulting time histories of the closed-loop systems response are analyzed. The present method has the advantage that the physical parameters of the system are directly estimated. The numerical examples showed excellent results and it is expected that the present method can be applied to the on-orbit modal testing of controlled space structures.

关键词： Filtering (signal processing) Performance modeling Smart materials Stochastic processes complex systems Finite element methods Matrices Numerical simulations Aerospace engineering control systems

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Research on Structure Design and control Method of Underwater Exploration Robot 7

Research on Structure Design and Control Method of Underwate...

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7th international conference on Intelligent, Interactive systems and Applications, IISA2022

作者： Cao, Lijing Kong, Tengguang Zhou, Mei Shandong Xiehe University Shandong Province Jinan250109 China Shandong Jianzhu University Shandong Province Jinan250101 China

For the sake of complete the detection of complex underwater environment in the engineering construction, this paper designs the structure of the underwater exploration robot according to the actual requirements of the project, and proposes a control method of the underwater exploration robot using neural network to improve the PID control ***, the overall structure and control system layout of underwater exploration robot are designed and planned according to the design ***, aiming at the problems of complex parameter setting and poor real-time performance of system parameters in traditional control methods, the automatic learning characteristics of feedforward neural network and PID controller are combined to realize the online alter of PID control unit ***, according to the above method, a PID controller with automatic learning characteristics is designed to control the underwater exploration robot, which can achieve the optimal parameter combination of the underwater exploration robot's motion control, and improve its poor adaptability in underwater motion. © 2022 The Authors. Published by Elsevier B.V.

关键词： Three term control systems

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