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2013 AASRI Conference on Intelligent systems and control（ISC 2013）

作者： N.M.A Ghani A.N.K Nasir M.A.H Hassan M.O Tokhi Automatic Control and System Engineering department

This paper focuses on the development of a control strategy of a compact stair climbing wheelchair to maintain stable and balance while negotiating staircases in confined spaces for the elderly and *** Visual Nastran 4D is used to develop a simulation models and linked with Matlab platform for control and visual assessment *** challenges are to control front and rear motors as well as tilt angle to ensure system stability and maintain smoothness of the climbing ***-Fuzzy controls are developed,tested and associated performances are assessed through intensive visual approach.

关键词： Stair climbing Climbing wheelchair Fuzzy logic Stability control

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Evaluation of the cost of using power plant reject heat in low-temperature district heating and cooling networks

Evaluation of the cost of using power plant reject heat in l...

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2016 World Congress on Sustainable Technologies, WCST 2016

作者： Santos, Antonio Colmenar Diez, David Borge Asensio, Enrique Rosales Sánchez, Patricia Sánchez Department of Electric Electronic and Control Engineering UNED Madrid28040 Spain Department of Electric System and Automatic Engineering Universidad de León León Spain

ISBN: (纸本)9781908320704

The purpose of this paper is to assess the economic impact following as a result of the conversion of conventional stations to cogeneration plants connected to a system for distributing heat and refrigeration. The analysis will be carried out through a financial evaluation in order to assess yearly variations of the whole scheme expenditure. In particular, yearly capital and operating costs of supplying cold and heat to urban areas that represent weather conditions in northern, central, and southern Europe were studied. In the base case scenario, today conditions are represented;they will be compared with alternative scenarios in which existing conventional thermal power stations will be converted into cogeneration plants. This research work contributes to the pool of existing knowledge by giving a (so far not addressed) weather centered system perspective. From the conducted evaluation, it was found that, in the case of deciding to convert the studied conventional thermal plants into cogeneration plants, investing in the necessary infrastructure associated means that yearly expenses for the power plants located in Oldenburg-Wilhelmshaven, Bristol, and Cartagena would decrease by 215, 89, and 192 million euros respectively, making this technology a highly attractive option from economic, energetic, and environmental perspectives. © 2016 Infonomics Society.

关键词： Cogeneration plants

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A robust wind turbine control using a neural network based wind speed estimator

A robust wind turbine control using a neural network based w...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 International Joint Conference on Neural Networks, IJCNN 2010

作者： Barambones, Oscar Department of Automatic Control and System Engineering University of the Basque Country EUI de Vitoria Nieves cano 12 01006 Vitoria Spain

ISBN: (纸本)9781424469178

Modern wind turbines are capable to work in variable speed operations. These wind turbines are provided with adjustable speed generators, like the double feed induction generator. One of the main advantage of adjustable speed generators is that they improve the system efficiency compared to fixed speed generators because turbine speed is adjusted as a function of wind speed to maximize output power. In this sense, to implement maximum wind power extraction, most controller designs of the variable-speed wind turbine generators employ anemometers to measure wind speed in order to obtain the desired optimal generator speed. In this paper a Neural Network based wind speed estimator for a wind turbine control is proposed. The design uses a feedforward Artificial Neural Network (ANN) to implement a wind speed estimator. In this work, a sliding mode control for variable speed wind turbines is also proposed. The stability analysis of the proposed controller is provided under disturbances and parameter uncertainties by using the Lyapunov stability theory. Finally simulated results show, on the one hand that the proposed control scheme using an ANN estimator provides high-performance dynamic characteristics, and on the other hand that this scheme is robust under uncertainties that usually appear in the real systems and under wind speed variations. © 2010 IEEE.

关键词： Neural networks

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Research of Adaptive Attitude control Method Considering Disturbance Compensation and Fuzzy Parameter Adjustment

Research of Adaptive Attitude Control Method Considering Dis...

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2022 Chinese Automation Congress, CAC 2022

作者： Liu, Xiaodong Zhang, Yu Lin, Yuye Mo, Jiaxuan Zhao, JiKang Beijing Aerospace Automatic Control Institute Beijing China China Academy of Launch Vehicle Technology System Engineering Department Beijing China

ISBN: (纸本)9781665465335

Be directed against the characteristics with respect to faster change of aircraft parameters, higher uncertainty and stronger channel coupling, a robust adaptive design method of aircraft attitude controller is proposed. According to the attitude motion equations during unpowered flight, a nonlinear design model facing for attitude control is first established. Then, according to the as-built design model, a robust dynamic inversion control method based on adaptive multi-variable linear extended state observer is proposed, and it is applied to the design of aircraft full-channel attitude controller through dynamic surface control theory. At the same time, a fuzzy parameter adjustment strategy is proposed to adjust the gain coefficient real-timely along with the margin of the present control ability, which can ensure the matching relationship between control parameters and control ability. Through the analysis on the simulation results, in comparison with one conventional controller, the controller proposed in this research ensures that the aircraft can track the attitude angle command faster and more accurately, and it has strong robust characteristics against time-varying uncertainty. © 2022 IEEE.

关键词： controllers

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PID control of knee extension for FES-assisted walking with spring brake orthosis

PID control of knee extension for FES-assisted walking with ...

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Asia Modelling Symposium 2010: 4th International Conference on Mathematical Modelling and Computer Simulation, AMS2010

作者： Jailani, R. Tokhi, M.O. Gharooni, S.C. Hussain, Z. Department of Automatic Control and System Engineering University of Sheffield United Kingdom Faculty of Electrical Engineering Universiti Teknologi MARA 40450 Shah Alam Malaysia

ISBN: (纸本)9780769540627

This paper presents a simulation of bipedal locomotion to control the stimulation pulses of functional electrical stimulation (FES) for activating muscles for paraplegic walking with spring brake orthosis (SBO). The work is a first effort towards restoring natural like swing phase in paraplegic gait through a new hybrid orthosis, referred to as spring brake orthosis (SBO). This mechanism simplifies the control task and results in smooth motion and more-natural like trajectory produced by the flexion reflex for gait in spinal cord injured subjects. The study is carried out with a model of humanoid with wheel walker using the Visual Nastran (Vn4D) dynamic simulation software. Stimulated muscle model of quadriceps is developed for knee extension. Proportional integral derivative (PID) control is developed in Matlab/Simulink to regulate the muscle stimulation pulse-width required to drive FES-assisted walking gait and the computed motion is visualised in graphic animation from Vn4D. The results show that SBO can reduce torque and stimulation pulses required for FES-assisted paraplegic walking with wheel walker and PID control is found to be appropriate controller for the leg extension. © 2010 IEEE.

关键词： Three term control systems

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Cogeneration and district heating networks: Measures to remove institutional and financial barriers that restrict their joint use in the EU-28

Cogeneration and district heating networks: Measures to remo...

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2016 World Congress on Sustainable Technologies, WCST 2016

ISBN: (纸本)9781908320704

The aim of this research is to identify actions that dissipate the institutional and financial barriers that are faced by those energy projects which comprise the joint use of district heating networks and cogeneration in the EU-28. From this evaluation, institutional and financial barriers were identified, which included: distinctive competence, fuel price volatility, and much of the current regulatory framework. In order to achieve an effective removal of these barriers, and apart from generic and common actions to all the schemes, such as creating anchor loads, adopting an active marketing strategy by the local authorities, or the proposition of updating some communitarian directives on energy issues;it is also necessary to adopt those actions that respond to the casuistry of each Member State. Such actions will ultimately represent the most effective way to get a generalised implementation of energy projects that include a joint use of district heating networks and cogeneration. © 2016 Infonomics Society.

关键词： District heating

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A new neurofuzzy network for selforganizing control 15th

A new neurofuzzy network for selforganizing control

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15th World Congress of the International Federation of automatic control, 2002

作者： Constantin, Nicolae Automatic Control and System Engineering Department University Politehnica Bucharest Spl. Independentei nr. 313 Bucharest77206 Romania

ISBN: (纸本)9783902661746

In this paper a novel neural fuzzy inference network (NFIN) it is proposed. The NFIN represent a modified Takagi-Sugeno-Kang (TSK) type fuzzy rule based model with neural network learning ability. The rules in the NFIN are created and adapted in an on-line learning algorithm. The structure learning together with the parameter learning forms the learning algorithms for the neural fuzzy network. It is proved that NFIN can greatly reduce the training time, avoid the overtuned phenomenon and has perfect regulation ability. Copyright © 2002 IFAC.

关键词： Learning algorithms

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A multi-agent approach for leather processing monitoring and quality control

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2015年第3 3期77 77卷 17-30页

作者： Guţʇ, Sergiu-Adrian Dumitrache, Ioan Dept. of Automatic Control and System Engineering University POLITEHNICA of Bucharest Romania Automatic Control and System Engineering Department Automatic Control and Computers Faculty University POLITEHNICA of Bucharest Romania

Currently there is no reliable mechanism available to allow continuous monitoring of all process conditions and leather characteristics inside the closed reactors during leather processing, so no real control. Conditions inside the reactors can only be monitored by stopping the reactor to sample the solution and leather. The automation systems for leather industry rely on stale centralised architecture, a critical point of failure imposing operational bottleneck. To improve the efficiency of leather manufacturing process the paper proposes a multi-agent system (MAS) architecture that is fault tolerant, and that provides high flexibility and agility needed by the turbulent environment of leather industry.

关键词： Multi agent systems

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A simulation based decision tool to coordinate emergency services in a road accident

A simulation based decision tool to coordinate emergency ser...

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Summer Computer Simulation Conference 2006, SCSC 2006, Part of the 2006 Summer Simulation Multiconference, SummerSim 2006

作者： Guimarans, D. Ramos, J.J. Piera, M.A. Guasch, A. Department of Telecommunication and System Engineering LogiSim Universitat Autònoma de Barcelona 08193 Bellaterra Spain Department of System Engineering and Automatic Control LogiSim Universitat Politecnica de Catalunya 08028 Barcelona Spain

ISBN: (纸本)9781622763528

The coordination of emergency services in road accidents is essential to ensure a quick intervention in critical situations. The number and kind of resources assigned must be determined dynamically, as not all the accident variables are known when an alert is received. In addition, some decisions can only be token at the accident scene and may affect emergency service's distribution. This paper presents the model and the laboratory environment that is being developed for the design of real-time decision tools for the coordination of emergency services. Furthermore, it describes the major characteristics of an optimization algorithm proposed to tackle the emergency services coordination problem. This algorithm combines heuristic methods and Constraint Satisfaction Problem techniques in a two interactive phases procedure.

关键词： Emergency services

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A Hybrid Temporal-Magnitude Based Sampling for Event-Based control 3

A Hybrid Temporal-Magnitude Based Sampling for Event-Based C...

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3rd IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2024

作者： Miguel-Escrig, Oscar Sanchez-Moreno, Jose Romero-Perez, Julio-Ariel Dormido-Bencomo, Sebastian Universitat Jaume I Department of System Engineering and Design Castelló de la Plana Spain Department of Computer Science and Automatic Control Madrid Spain

ISBN: (纸本)9798331540319

In the current industrial environment, which is shifting towards an event-based control prone paradigm, sampling strategies in use must be revisited. Both temporal and magnitude dependent sampling strategies have been demonstrated to be suitable for control systems, reporting benefits in different categories. However, these sampling strategies also present some drawbacks, discussed in this contribution. Aiming to address some of these drawbacks, a new sampling strategy is proposed gathering characteristics of both predecessors. © 2024 IEEE.

关键词： Decentralized control

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