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检索条件"主题词=Computer algorithms"

共 3297 条记录，以下是1711-1720 订阅

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Dither Based Precise Position Control of Piezo Actuated Micro-Nano Manipulator

Dither Based Precise Position Control of Piezo Actuated Micr...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Saikat Kumar Shome Sourav Pradhan Arpita Mukherjee Uma Datta E & I Group CSIR-CMERI Dept of Electrical Engg National Institute of Technology Sr Scientist E & I Group CSIR-CMERI

ISBN: (纸本)9781479902255

This paper addresses the problem of hysteresis and presents a new control scheme for hysteresis compensation of piezo-electrically actuated micro-nano manipulators. The technology employs an Inverse Dahl model based feed-forward mechanism in combination with a feedback control algorithm along with simultaneous voltage and displacement dither strategy. The actuator performance is seen to improve as a function of injected noise level into the plant - a phenomenon known as dithering. The notion of stochastic resonance for nano positioning is studied to determine the optimal dither level for efficient plant performance. The efficacy of the proposed control scheme has been confirmed through rigorous simulations in terms of two specific tests - a) tracking error test and b) hysteresis curve area test. Results show an enhanced positioning precision of the manipulator with the proposed dither control than without it. Owing to its algorithmic simplicity, the proposed control genre can be extended to the parlance of other nano-scale applications.

关键词： Stochastic resonance Dahl model Feedback compensation Tracking error Nano positioning dithering Stochastic resonance feedback compensation follow error Position control delay compensation computer algorithms

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A Digital Charge-Mode Control Algorithm for Power Decoupling in a Flyback Microinverter

A Digital Charge-Mode Control Algorithm for Power Decoupling...

引用

IEEE Energy Conversion Congress and Exposition

作者： Shiladri Chakraborty Niharika Gupta Souvik Chattopadhyay Department of Electrical Engineering Indian Institute of Technology Kharagpur

ISBN: (纸本)9781479903375

This paper proposes a novel implementation scheme for the controller of a single-phase, grid-connected, flyback PV microinverter topology, which employs low-value film capacitors for achieving power decoupling. The proposed charge-balance criterion is used to develop a real-time controller which eliminates parameter-dependence, thereby improving the robustness of the system. A predictive algorithm is used to estimate the flyback transformer current in order to avoid inaccuracies arising from directly sensing the current. A stability analysis of the scheme is also presented, which reveals additional design restrictions on the minimum voltage of the decoupling capacitor. Simulation and experimental results validate the effectiveness of the approach.

关键词： Stability analysis flyback real-time controller DECOUPLING computer algorithms BALANCED CHARGE decoupling capacitor Controllers Power (Psychology) thin film capacitors Energy sources

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Position Regulation of Flexible-Joint Robots with Input/Output Constant Delays

Position Regulation of Flexible-Joint Robots with Input/Outp...

引用

IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Yen-Chen Liu Nikhil Chopra Department of Mechanical Engineering National Cheng Kung University Tainan 70101 Taiwan Department of Mechanical Engineering University of Maryland College Park 20742 MD USA

ISBN: (纸本)9781467363563

In this paper, the problem of set-point control for flexible-joint robotic manipulators with input/output time delays is investigated. By utilizing scattering transformation with an input-output passive controller, it is demonstrated that the flexible-joint robotic control system can be stabilized when there are time delays in the communication channels. Although stabilization is achieved, the flexible-joint robot cannot be regulated to the desired configuration when utilizing the scattering variables. Hence, a new control framework without scattering transformation is subsequently studied in this paper to guarantee both stability and position regulation provided that the control gain is appropriately selected based on a bound on the time delays. The proposed control algorithms are validated via numerical examples on a two-link flexible-joint robotic manipulator.

关键词： set point control Robot computer algorithms Standing Orders broadcasting Robot control articulated robot Robot Manipulator

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Rapid Turning at High-Speed: Inspirations from the Cheetah's Tail

Rapid Turning at High-Speed: Inspirations from the Cheetah's...

引用

IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Amir Patel M. Braae Department of Electrical Engineering University of Cape Town South Africa

ISBN: (纸本)9781467363563

Inspired by the cheetah, we present a novel tail control system for manoeuvring terrestrial robots at high speed. The mathematic model for a high-speed turn is derived and the model with a tail is shown to be more successful at rapid turns in simulation. We then built a high speed mobile platform with an actuated tail to experimentally validate the control algorithms. Further controller development is performed based on results of the initial simulations. Finally, we show that by rapidly swinging the tail, our system is capable of turning at much higher speeds than a tail-less version.

关键词： cheetahs High speed computer algorithms simulating

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Cardioresponsive Left Ventricular Assist Device

Cardioresponsive Left Ventricular Assist Device

引用

Annual Northeast Bioengineering Conference

作者： A. Abadeer M. Putnins J. Badach P. Kamdar M. Yang Department of Chemistry Chemical Biology and Biomedical Engineering Stevens Institute of Technology 1 Castle Point on Hudson Hoboken NJ 07030

ISBN: (纸本)9781467349284

A gradated cardioresponsive Left Ventricular Assist Device (LVAD) control algorithm was developed in order to improve cardiac reverse remodeling in patients who suffer from late to end-stage heart failure. This algorithm was created to improve physician control of the LVAD as well as improve awareness of the patient's condition. The control algorithm was validated using a mock circulatory system and simulated LVAD.

关键词： LVAD Cardioresponsive control algorithm Left Ventricular Assist Device computer algorithms Cardiovascular System Circulation systems Heart Failure Awareness

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Subcutaneous Neural Inverse Optimal Control for an Artificial Pancreas

Subcutaneous Neural Inverse Optimal Control for an Artificia...

引用

International Joint Conference on Neural Networks

作者： Blanca S. Leon Alma Y. Alanis Edgar N. Sanchez Fernando Ornelas-Tellez Eduardo Ruiz-Velazquez CINVESTAV Unidad Guadalajara Apartado Postal 31-438 Plaza La Luna Guadalajara Jalisco C.P. 45091 Mexico. CUCEI Universidad de Guadalajara Apartado Postal 51-71 Col. las aguilas C.P. 45080 Zapopan Jalisco Mexico Division de Estudios de Posgrado Facultad de Ingenieria Electrica UMSNH F.J. Mugica SN Ciudad Universitaria Morelia 58030 Mich. Mexico

ISBN: (纸本)9781467361279

Type 1 Diabetes mellitus (T1DM) is a chronic disease that occurs when the body cannot produce insulin. Since insulin was discovered in 1920, the way to keep T1DM patients blood glucose at normal levels has been insulin injections, via subcutaneous or intravenous paths. The efforts for an external infusion therapy have resulted in the so-called Artificial Pancreas. Such device attempts to integrate continuous insulin infusion, continuous glucose monitoring and an automatic control algorithm, which calculates the required insulin infusion. Considering all the problems related to T1DM, in this paper a neural model which captures the nonlinear behavior of the complex glucose-insulin dynamics is proposed;based on this model, a control algorithm is developed using the neural inverse optimal control via control lyapunov function (CLF) technique. Simulation results illustrate the applicability of the propounded scheme.

关键词： Artificial Pancreas T1DM CLF Artificial Pancreas chlorofibre computer algorithms insulin infusion Insulin Insulins Administration, Intravenous glucose monitoring Optimal control

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A Power Supply Reaching Titanium Level Efficiency for a Wide Range of Input Voltages

A Power Supply Reaching Titanium Level Efficiency for a Wide...

引用

IEEE Energy Conversion Congress and Exposition

作者： Werner Konrad Christian Rainer Gerald Deboy Annette Muetze Electric Drives and Machines Institute Graz University of Technology 8010 Graz Austria Infineon Technologies Austria AG Siemensstra?e 2 9500 Villach Austria

ISBN: (纸本)9781479903375

To achieve the highest possible grade for server or computer power supplies in terms of efficiency, various solutions for high line input already exist on the market. In this work a new topology is investigated closely in simulation, showing that the titanium grade may also be achievable at low line input and how the control can be done by utilizing low voltage MOSFETs. Currently the control algorithm is already implemented in real hardware and the prototype for one module is under developement.

关键词： Input Voltages real hardware already implemented Input Voltage Electric Power Source wide-range Titanium computer algorithms Servers

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Fast and Accurate Battery Model including Temperature Dependency

Fast and Accurate Battery Model including Temperature Depend...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Bernhard Schweighofer Manes Recheis Thomas Gallien Hannes Wegleiter Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology

ISBN: (纸本)9781479902255

The need to reduce fuel consumption, minimize emissions, and improve levels of safety, comfort, and reliability is expected to result in a much higher demand for electric power in future cars. In order to develop the needed control algorithms and to optimize the required components adequate simulation models are needed. In this paper, the authors present a battery model based on an equivalent electrical circuit able to describe the current-voltage behavior depending on the state of charge and temperature. Due to the simple structure of the model only a small computational effort is required. Nevertheless a good agreement between measurement and simulation is achieved.

关键词： Lithium-ion battery Dynamic model Transient response lithium ion battery TRANSIENT RESPONSE dynamic models Fasting Batteries CHARGE STATES computer algorithms simple structures Electric power electrical energy Fuel consumption Model structures Simulation models

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A Linear Equation Solution Space Based Control Algorithm for the Matrix Converter

A Linear Equation Solution Space Based Control Algorithm for...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Binxin Zhou Yueping Mo Wei Jiang Stephen. J. Finney Barry W. Williams School of Energy and Power Engineering Yangzhou University Department of Electronic & Electrical Engineering Strathclyde University

ISBN: (纸本)9781479902255

A novel algorithm is presented based on linear equation solution space theory to calculate the classic three-phase to three-phase matrix converter PWM duty cycles. It algebraically reveals an intrinsic two useful degrees of freedom in modulating the duty cycles;also discloses a general method of how to deal with distortion in the input voltage or output current whose form and harmonics quantity are not obvious. Derivation of the algorithm, its control techniques and potential are given;comparisons to the Venturini algorithm and the space vector modulation method are given, simulation and experimental results confirm the algorithm.

关键词： Converter Algorithm Matrix converter PWM matrix converters Pokeweed Mitogens Pulse width modulation Converters computer algorithms algorithms Input Voltage Solution space Linear equation DUTY CYCLE output current

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Autonomous Operation of Multiple Interconnected Microgrids with Self–Healing Capability

Autonomous Operation of Multiple Interconnected Microgrids w...

引用

IEEE Power and Energy Society General Meeting

作者： Farhad Shahnia Ruwan P.S. Chandrasena Sumedha Rajakaruna Arindam Ghosh Centre of Smart Grid and Sustainable Power Systems Electrical and Computer Engineering Department Curtin University Perth Australia School of Electrical Engineering and Computer Science Queensland University of Technology Brisbane Australia.

ISBN: (纸本)9781479913022

This paper shows how multiple interconnected microgrids can operate in autonomous mode in a self–healing medium voltage network. This is possible if based on network self– healing capability, the neighbour microgrids are interconnected and a surplus generation capacity is available in some of the Distributed Energy Resources (DERs) of the interconnected microgrids. This will reduce or prevent load shedding within the microgrids with less generation capacity. Therefore, DERs in a microgrid are controlled such that they share the local load within that microgrid as well as the loads in other interconnected microgrids. Different control algorithms are proposed to manage the DERs at different operating conditions. On the other hand, a Distribution Static Compensator (DSTATCOM) is employed to regulate the voltage. The efficacy of the proposed power control, sharing and management among DERs in multiple interconnected microgrids is validated through extensive simulation studies using PSCAD/EMTDC.

关键词： Autonomous Operation Multiple Interconnected Microgrids Self–Healing Capability MICRO-GRID autonomous operation PLANT CAPACITY Density estimation robust algorithm partial load load shedding computer algorithms medium-voltage network Operating conditions LOAD

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