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检索条件"主题词=Computer algorithms"

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Flame extinguishment by cooperation of two aerial extinguishers

Flame extinguishment by cooperation of two aerial extinguish...

引用

IEEE/SICE International Symposium on System Integration

作者： Yasushi Iwatani Hiroyuki Torikai Department of Science and Technology Hirosaki University

ISBN: (纸本)9781467372435

Fire extinguishment approaches with inert gas such as carbon dioxide (CO_2) or nitrogen (N_2) have several advantages compared with ones with water. On the other hand, they have low extinguishment performance and put lives at risk. To enhance the extinguishment performance and to reduce risk to life, the authors have proposed a robotic fire extinguishment approach with massive aerial extinguishers with inert gas. This paper proposes a control algorithm for multiple aerial extinguishers without any markers, while a single extinguisher with an easily extracted marker has been controlled in our previous work. This paper also demonstrates flight control of two extinguishers and flame extinguishment by cooperation with two extinguishers. The cooperative behavior in the flame extinguishment experiment is not explicitly programmed, and the two extinguishers are simply controlled by trajectory tracking using PID controllers.

关键词： EXTINGUISHERS(FIRE) Fire suppression computer algorithms Carbon Dioxide rare gases At-risk Aircraft control trajectory tracking Proportional Integral Derivative Control nitrogen fixation

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Predictive Controller Design for a Sensorless IPMSM Speed Control System

Predictive Controller Design for a Sensorless IPMSM Speed Co...

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Annual Conference on IEEE Industrial Electronics Society

作者： Jui-Ling Chen Tian-Hua Liu Department of Electrical Engineering National Taiwan University of Science and Technology

ISBN: (纸本)9781467324199

This paper proposes a predictive controller design for a sensorless interior permanent magnet synchronous motor drive system. The controllers include a current-loop predictive controller and a speed-loop predictive controller with an external load estimator. In addition, the estimated error of the rotor position estimator is reduced due to the using of the on-line tuning stator resistance and q-axis inductance. By using the proposed control algorithms, the closed-loop sensorless interior permanent magnet synchronous motor drive system can achieve fast transient responses, satisfactory load disturbance responses, and good tracking responses. A digital signal processor, TMS 320F2812, is used to perform the rotor position estimating algorithm and the predictive control algorithm. As a result, the hardware is very simple. Experimental results can validate the theoretical analysis and show that the predictive controllers have better performance than the PI controllers.

关键词： Predictive controllers computer algorithms drive train controller design PI control Sensors rotor position Permanent magnet synchronous machines stator resistance speed control system

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VOLTAGE REGULATION (MV) BY MEANS OF Q(U) - SIMULATION AND MEASUREMENT ON A 12 MVA PV POWER PLANT

VOLTAGE REGULATION (MV) BY MEANS OF Q(U) - SIMULATION AND ME...

引用

Workshop on Integration of Renewables into the Distribution Grid

作者： Adrian CONSTANTIN Radu Dan LAZAR Soren Baekhoj KJAER Danfoss Solar Inverters A/S

ISBN: (纸本)9781622763153

Open loop reactive power (Q) control function of the local voltage (U) measured at the inverter's terminals is one possibility to comply with the BDEW's MV grid regulations [1] in Germany, while other countries are considering to apply this solution as well. A better understanding of the stability limits for such a control algorithm is required when applying it to large PV plants or PV dominated grids. A dynamic RMS simulation model of a big PV plant including Q(U) control is developed. The model is compared with real life measurements in the PV plant and the local laboratory. Various study cases are further on performed in order to assess the voltage stability. An upper stability limit can be found depending on the grid connection parameters in the point of common coupling (PCC).

关键词： Polydnaviridae Qualified Unit stability limits Voltage regulation computer algorithms Power Plants Voltage stability point of common coupling MOTOR VEHICLE TRAFFIC ACCIDENTS

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Hierarchical Control of Combined Power Control Resources Mitigating Local Power Grid Fluctuations

Hierarchical Control of Combined Power Control Resources Mit...

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International Conference on Information, Communication and Automation Technologies

作者： Cedric Bodet Anett Schulke NEC Laboratories Europe NEC Europe Ltd.

ISBN: (纸本)9781479904297

Power grid fluctuations are an increasing concern with the high penetration of intermittent generation sources. This paper describes a hierarchical control scheme defined by the dynamics of de-coupled power units over possibly different business domains into an integrated control scheme providing fluctuation mitigation. Specifically, a method built on the combination of charging control of a variable EV fleet and a small-scale energy storage system in a prioritized control hierarchy is investigated with its impacts on both domains. The control hierarchy uses the EV charging dynamics as prime resource for the mitigation of local generation fluctuations and accommodates the residual lack with local electric storage. The definition of a controllable power range for the charging stations allows for the EV charging infrastructure to serve as a power service. The underlying two-layer control algorithms is evaluated through simulations of the dynamics of a residential grid segment combining different grid resources. The results show significantly enhanced performance for effectively reducing the energy surplus-needs through the prime control layer (here: EV charging), but also the need for careful design of secondary power capacities (here: storage).

关键词： stepping controls control hierarchy Electric vehicles Power grids CHARGING(ACCOUNTTNG) charging computer algorithms dynamics combined dynamic battery energy storage system THERMAL ENERGY STORAGE SYSTEMS flywheel energy storage system fluctuations

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Learning-based Controller for Robotic Manipulators with Grey Learning Rate

Learning-based Controller for Robotic Manipulators with Grey...

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IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)

作者： Han-Pang Huang Shin-Wei Lin Jiu-Lou Yan Tzu-Hsin Kuo Yang-Lun Liu Department of Mechanical Engineering National Taiwan University Taipei Taiwan 10617 China Industrial Technology Research Institute Hsinchu Taiwan 31040 China

ISBN: (纸本)9781457708381

This paper is aimed to design a learning-based controller for robotic manipulators. A controller is proposed to estimate the nonlinear system dynamics and minimize tracking error in motion. In order to improve the learning speed and performance, a new CMAC (cerebellar model articulation controller) controller with grey learning rate is proposed. The grey learning rate, which is based on a grey relational analysis, is utilized to adjust the learning rate online. Real-time tracking control can be achieved with the proposed controller. To demonstrate the performance of the proposed controller, ADMAS and MATLAB/Simulink are used for simulation. The NI sbRIO-9642 is employed to realize the control algorithm on the NTU robot arm, which is developed by our laboratory. The simulation and experimental results show that the proposed learning-based controller can provide better tracking performance than the conventional ones.

关键词： Robot Manipulator learning rate Controllers computer algorithms System dynamics CMAC Manipulators grey

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Distributed Power Control for OFDMA based Spatial Multiplexing Multi-hop Systems

Distributed Power Control for OFDMA based Spatial Multiplexi...

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2009 3rd IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE 2009)

作者： Bin Fan Wenbo Wang Yicheng Lin Kan Zheng Wireless Signal Processing and Network Lab Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts & Telecommunications Beijing China

ISBN: (纸本)9781424440757;9781424440740

In this paper, a distributed power control algorithm is proposed to perform adaptive spatial multiplexing for the relay enhanced orthogonal frequency division multiple access (OFDMA) cellular systems. As the optimal spatial multiplexing problem is non-convex, we utilize the distributed iteration method to achieve its near-optimal solution. By determining the restriction on the transmit power for each subcarrier, the individual power allocation at the base station (BS) and the relay station (RS) can always converge to some desirable Nash Equilibriums with satisfying performance. Simulation results show that the proposed distributed power control algorithm provides significant gain in system transmit rate over the traditional iterative water-filling scheme.

关键词： Power control OFDMA space division multiplexing Transmitter power computer algorithms Orthogonal frequency division multiplexing relay Non-Convex Distribute Spread spectrum communication

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Implementation of an Asymmetric Relay Autotuner in a Sequential Control Language

Implementation of an Asymmetric Relay Autotuner in a Sequent...

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IEEE International Conference on Automation Science and Engineering

作者： Alfred Theorin Josefin Berner Department of Automatic Control Lund University

ISBN: (纸本)9781467381840

Control applications contain both logic, sequencing, and control algorithms. A holistic view of this is seldom presented in teaching and papers. One reason is the separation of communities - automation groups typically come from the Programmable Logic Controller (PLC) world while control engineers primarily come from the Distributed Control System (DCS) world. Both logic, sequencing, and control algorithms are, however, well integrated in today's control systems since DCS systems now contain logic and sequencing and PLCs now contain control algorithms. This paper shows that both logic, sequencing, and control algorithms can be integrated seamlessly in a sequential control language. The particular application considered is a PID controller with a relay autotuner. The presented autotuner implementation yields good controller parameters and is freely available.

关键词： computer algorithms sequential control Formal logic Proportional Integral Derivative Control relay Analyses, Sequence COMMAND AND CONTROL LANGUAGES Programmable logic controllers control engineering Language DC SYSTEMS Sequencing

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PRIMARY FREQUENCY RESPONSE IN THE GREAT BRITAIN POWER SYSTEM FROM DYNAMICALLY CONTROLLED REFRIGERATORS 22nd

PRIMARY FREQUENCY RESPONSE IN THE GREAT BRITAIN POWER SYSTEM...

引用

International Conference and Exhibition on Electricity Distribution

作者： Meng Cheng Jianzhong Wu Janaka Ekanayake Toby Coleman William Hung Nick Jenkins Cardiff Univ. Cardiff UK|c|

ISBN: (纸本)9781629931333

Primary frequency response from dynamically controlled refrigerators was investigated. A control algorithm was applied to a model of refrigerators to regulate their power consumption according to the deviation of system frequency. A model of a population of refrigerators equipped with such control was implemented in PowerFactory. A simplified Great Britain (GB) power system model was used to investigate primary frequency response from the refrigerators. Simulation results show that the refrigerators react effectively to the frequency variations by varying their power consumption.

关键词： Frequency variation Great Britain system frequency computer algorithms Power consumption refrigerator frequency response

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Control of High-speed Permanent Magnet Synchronous Machine

Control of High-speed Permanent Magnet Synchronous Machine

引用

Annual Conference on IEEE Industrial Electronics Society

作者： Jan Chysky Jaroslav Novak Martin Novak Czech Technical University in Prague Faculty of Mechanical Engineering Department of Instrumentation and Control Engineering

ISBN: (纸本)9781467324199

This paper presents results of the control algorithm development for vector control of permanent magnet synchronous machine realised on DSP TMS320F2812. Results of experiments and project of new control unit based on FPGA are presented. The setup was tested with permanent magnet motor up to 42000 RPM, nominal torque 1.2 Nm and nominal current 11 A.

关键词： Permanent magnet synchronous machines computer algorithms control unit Vector control Pest Control Standing Orders Field programmable gate arrays Nominal

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Two-Phase Interleaved Buck Converter with a new Digital Self-Oscillating Modulator

Two-Phase Interleaved Buck Converter with a new Digital Self...

引用

International Conference on Power Electronics

作者： Lars T. Jakobsen Michael A. E. Andersen Technical University of Denmark Oersted-Automation

ISBN: (纸本)9781424418718

This paper presents a new Digital Self-Oscillating Modulator (DiSOM) for DC/DC converters. The DiSOM modulator alllows the digital control algorithm to sample the output voltage at a sampling frequency higher than the converter switching frequency. This enables higher control loop bandwidth than for traditional digital PWM modulators given a certain switching frequency. A synchronised version of the DiSOM modulator is derived for interleaved converters. A prototype interleaved Buck converter for Point of Load applications has been designed and built to test the performance of DiSOM modulator. The DiSOM modulator and a digital control algorithm have been implemented in an FPGA. Experimental results show that the converter has a very fast transient response when a loadstep is applied to the output. For a loadstep of 50% of nominal output current the output voltage overshoot is less than 2.5% of the nominal output voltage and the settling time is just 8 switching periods.

关键词： output voltage Modulators Converters step-down converter computer algorithms nominal output setting time TRANSIENT RESPONSE Switching frequency

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