Gotowe bibliografie tematyczne / INDIRECT VECTOR CONTROL

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Gotowa bibliografia na temat „INDIRECT VECTOR CONTROL”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "INDIRECT VECTOR CONTROL"

Guru, Neelakantha, Santosh Kumar Mishra i B. Nayak. "Indirect Vector Control of Multi Cage Induction Motor". International Journal of Computer Applications 68, nr 2 (18.04.2013): 25–32. http://dx.doi.org/10.5120/11552-6829.

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Moore, Sean M., Elizabeth T. Borer i Parviez R. Hosseini. "Predators indirectly control vector-borne disease: linking predator–prey and host–pathogen models". Journal of The Royal Society Interface 7, nr 42 (27.05.2009): 161–76. http://dx.doi.org/10.1098/rsif.2009.0131.

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Pathogens transmitted by arthropod vectors are common in human populations, agricultural systems and natural communities. Transmission of these vector-borne pathogens depends on the population dynamics of the vector species as well as its interactions with other species within the community. In particular, predation may be sufficient to control pathogen prevalence indirectly via the vector. To examine the indirect effect of predators on vectored-pathogen dynamics, we developed a theoretical model that integrates predator–prey and host–pathogen theory. We used this model to determine whether predation can prevent pathogen persistence or alter the stability of host–pathogen dynamics. We found that, in the absence of predation, pathogen prevalence in the host increases with vector fecundity, whereas predation on the vector causes pathogen prevalence to decline, or even become extinct, with increasing vector fecundity. We also found that predation on a vector may drastically slow the initial spread of a pathogen. The predator can increase host abundance indirectly by reducing or eliminating infection in the host population. These results highlight the importance of studying interactions that, within the greater community, may alter our predictions when studying disease dynamics. From an applied perspective, these results also suggest situations where an introduced predator or the natural enemies of a vector may slow the rate of spread of an emerging vector-borne pathogen.

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Li, Guo Hua, i Ji Qiang Wang. "Speed Sensor-Less Indirect Vector Control System Based on a Novel Sliding Mode Control Speed Observer". Advanced Materials Research 383-390 (listopad 2011): 196–201. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.196.

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Vector control is one of the most popular control techniques of induction motors. Owing to its simplicity, the indirect vector control gains increasing popularity. This paper proposes a speed sensor-less indirect vector control system of induction motors based on a novel sliding mode control (SMC) speed observer. The observer uses the stator current difference of the estimated value and the actual value to calculate the rotor speed. The simulation results show that the method has a fast response and high accuracy, and it robust to parameter variations.

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Zerdani, Sara, Mohamed Larbi Elhafyani, Hicham Fadil i Smail Zouggar. "Newly fault-tolerant indirect vector control for traction inverter". International Journal of Power Electronics and Drive Systems (IJPEDS) 12, nr 3 (1.09.2021): 1576. http://dx.doi.org/10.11591/ijpeds.v12.i3.pp1576-1585.

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<p>The traction inverter is a crucial power device in the electric vehicle’s powertrain, and its failure is intolerable as it would considerably compromise the system’s safety. For more reliable driving, installing a traction inverter that is sufficiently resistant to electrical failure is inherent. Due to its compact size and the small number of switches incorporated in three-phase four-switch inverter, this modular topology was used to compensate for the open switch’s failure. However, it is known to have manifold weaknesses mainly distinguished in the low-frequency region. This paper introduces a new fault-tolerant indirect control that handles the IGBT’s failure constituting the traction inverter. The fault compensator is designed first based on the Proportional Integral regulator combined with the notch filter to mitigate the current imbalance and restore the DC voltage equilibrium.Furthermore, to conceive a comprehensive fault-tolerant control, there must therefore contain an accurate fault detector. In this regard, an uncomplicated fault diagnosis method based on the current spectral analysis has been performed. The effectiveness of the submitted controller was validated by simulation using Matlab.</p>

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Blaustein, Leon, Richard S. Ostfeld i Robert D. Holt. "A Community-Ecology Framework for Understanding Vector and Vector-Borne Disease Dynamics". Israel Journal of Ecology and Evolution 56, nr 3-4 (6.05.2010): 251–62. http://dx.doi.org/10.1560/ijee.56.3-4.251.

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The integration of community ecology into the understanding and management of vectors and vector-borne diseases has largely occurred only recently. This compendium examines a variety of community interactions that can affect vector or vector-borne disease dynamics. They include: the importance of risk of predation, risk of ectoparasatism, competition, interactions of competition with transgenic control, apparent competition mediated through vectors, indirect effects of pesticides, vector diversity, and parasite diversity within a vector. In this paper, we summarize these studies and introduce several additional important questions in need of further exploration.

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Khaliq, Arjmand, Syed Abdul Rahman Kashif, Fahad Ahmad, Muhammad Anwar, Qaisar Shaheen, Rizwan Akhtar, Muhammad Arif Shah i Abdelzahir Abdelmaboud. "Indirect Vector Control of Linear Induction Motors Using Space Vector Pulse Width Modulation". Computers, Materials & Continua 74, nr 3 (2023): 6263–87. http://dx.doi.org/10.32604/cmc.2023.033027.

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Tran, Hoan Quoc, Tien Manh Vu i Tuyen Dinh Nguyen. "Space-vector modulation for three-phase indirect matrix converters to reduce common-mode voltage". Science & Technology Development Journal - Engineering and Technology 4, nr 2 (10.04.2021): first. http://dx.doi.org/10.32508/stdjet.v4i2.797.

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This paper presents a space vector modulation strategy for a three-phase indirect matrix converter to reduce the common-mode voltage and maintain the output performance. To reduce the peak value of the common-mode voltage to 57.7% of the input phase voltage, three active voltage vectors are used to generate the desired output voltage with arbitrary amplitude and frequency, instead of using both active and zero voltage vectors as in the traditional space vector modulation strategy. Although the common-mode voltage is reduced, the output waveform quality of the three-phase indirect matrix converter deteriorates due to the absence of the zero voltage vectors. To overcome this problem, the proposed space vector modulation strategy is redesigned to control the rectifier stage of the indirect matrix converter by utilizing three active current vectors instead of two as usual. Consequently, the constant average dc-link voltage is achieved, which can improve the output performance in terms of the output voltage and current harmonic distortion. The simulation is implemented by PSIM software and experimental results are provided to verify the effectiveness of the proposed space vector modulation strategy.

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Nannapaneni, Lavanya, i M. Venu Gopala Rao. "Control of Indirect Matrix Converter by Using Improved SVM Method". Bulletin of Electrical Engineering and Informatics 4, nr 1 (1.03.2015): 26–31. http://dx.doi.org/10.11591/eei.v4i1.311.

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A novel space vector modulation (SVM) method for an indirect matrix converter (IMC) is used to reduce the common -mode voltage (CMV) in the output. The process of selecting required active vectors and to describe the switching sequence in the inverter stage of the IMC is explained in this paper. This novel SVM method used to decrease the peak -to-peak amplitude voltage of CMV without using any external hardware. The other advantage of this SVM method is to reduce the total harmonic distortion of line-to-line output voltage. This new modulation technique is easily implemented through simulation and its results are used to demonstrate the improved performance of the input/output waveforms.

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Alazrag, A., i L. Sbita. "Asynchronous Machine with Wind Turbine IRFO Control". WSEAS TRANSACTIONS ON POWER SYSTEMS 17 (30.06.2022): 141–54. http://dx.doi.org/10.37394/232016.2022.17.15.

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The paper deals with a squirrel cage induction generator connected to the grid through a back-to-back converter driven by vector control. The stator-side converter controls the generator torque by means of an indirect vector control scheme. In order to reduce the system dependence from the mechanical system behavior, a torque loop is used in the current reference calculations. The battery energy storage system (BESS) plays a fundamental role in controlling and improving the efficiency of renewable energy sources. Stochasticity of wind speed and reliability of the main system components are considered. The grid-side converter controls the DC bus voltage and the reactive power in order to accomplish the grid codes. Speed control using flow directional control, indirect conventionally uses proportional integral (PI) type current regulators, which achieve satisfactory objectives on torque and flow dynamics. The objective of this article is to present an indirect vector control strategy with oriented rotor flux using current regulators of the proportional integral (PI) type, applied to an asynchronous machine supplied by a voltage inverter, capable of supplying during restrictive stresses, more satisfactory torque and flux responses. The obtained simulation results upon simulation tests of the global system are developed under the MATLAB / Simulink environment and are satisfactory.

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Usynin, Yu S., Yu S. Smirnov, T. A. Kozina i A. V. Valov. "Pulse-vector control with indirect determination of rotor angular position". Russian Electrical Engineering 84, nr 10 (październik 2013): 566–71. http://dx.doi.org/10.3103/s1068371213100106.

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Rozprawy doktorskie na temat "INDIRECT VECTOR CONTROL"

Kanekal, Ramesh V. "Modeling, simulation and analysis of an indirect vector controlled induction motor drive". Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/76443.

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Vector control technique is being widely used in ac motors drives for precise dynamic control of torque, speed and position. The application of vector control scheme to the induction motor drive and the complete modeling, analysis and simulation of the drive system are presented in this thesis. State space models of the motor and the speed controller and the real time models of the inverter switches and the vector controller are integrated to model the drive. Performance differences due to the use of PWM and hysteresis current controllers are examined. Simulation results of the torque and speed drive systems are given. The drive system is linearised around an operating point and the small signal response is evaluated.
Master of Science

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Gulec, Mustafa Alpertunga. "Vector Controlled Elevator Drive". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607186/index.pdf.

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In this thesis, a practical vector controlled elevator drive is presented. Indirect vector control of induction machine is investigated in theory and then implemented. Control technique is compared with scalar control and induction machine is compared with dc motor. The operation of the system depends on induction machine parameters, so how to accurately and automatically obtaining of the parameters is also presented. Finally, the elevator system is introduced, the application of this control system to the elevator system is described and a basic elevator control system is simulated.

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Diniz, Ãber de Castro. "Use of three-phase induction motors in an articulated manipulator of 2-dof considering the strategies of vector control and slidnig mode control". Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10710.

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This paper proposes the position control of an articulated manipulator of two degrees of freedom driven by induction motors with a controller in the current loop. The work includes the mechanical modeling of the handler that will be developed from the direct and inverse kinematics and position control of induction motors operating system and uncoupled allocated in the manipulator. Thus, we developed two strategies for control of manipulators with two degrees of freedom, one using the scheme for field-oriented vector control and other means of indirect sliding mode control (Sliding-Mode Control - SMC). These control strategies are applied to current loop of induction motors that drive the manipulator. The parameters of the position controller of manipulator are taken into account in calculating the controller parameters of the current control loop, in order to obtain satisfactory results in the positioning the degrees of freedom. In addition, we performed a comparative study between the indirect field-oriented vector control and sliding mode control applied to the current loop. The advantage of the SMC compared to the indirect field-oriented vector control due to the first had in its control law, developed in this thesis, the use of position degree of freedom manipulator applied directly in the control law, while the second acted only as a disturbed rejection controller for the position loop. The Proportional-Integral (PI) was used in the position and speed loops for both current control algorithms to provide a standard for comparison between. For the purpose of implementing the control system individually for each engine and motors coupled to the manipulator used a digital signal processor.
O presente trabalho propÃe o controle de posiÃÃo de um manipulador articulado de dois graus de liberdade acionado a partir de motores de induÃÃo trifÃsicos com um controlador na malha de corrente. O trabalho contempla a modelagem mecÃnica do manipulador que serÃ desenvolvida a partir das cinemÃticas direta e inversa e o controle de posiÃÃo dos motores de induÃÃo atuando desacoplados do sistema e alocados no manipulador. Deste modo, foram desenvolvidas duas estratÃgias de controle de manipuladores com dois graus de liberdade, uma utilizando o esquema por controle vetorial de campo orientado indireto e outra atravÃs de controle por modos deslizantes (Sliding Mode Control â SMC). Estas estratÃgias de controle sÃo aplicadas a malha de corrente dos motores de induÃÃo que acionam o manipulador. Os parÃmetros do controlador de posiÃÃo dos manipuladores sÃo levados em consideraÃÃo no cÃlculo dos parÃmetros do controlador da malha de controle de corrente, de modo a se obter resultados satisfatÃrios no posicionamento dos graus de liberdade. AlÃm disso, foi realizado um estudo comparativo entre o controle vetorial de campo orientado indireto e o controle de modos deslizantes aplicado na malha de corrente. A vantagem do SMC em relaÃÃo ao controle vetorial de campo orientado indireto deveu-se a que o primeiro possuÃa em sua lei de controle desenvolvida nesta tese a utilizaÃÃo direta da posiÃÃo do grau de liberdade do manipulador, enquanto que o segundo atuava somente como um controlador com rejeiÃÃo ao distÃrbio. O controlador Proporcional-Integral (PI) foi utilizado nas malhas de posiÃÃo e velocidade de modo a fornecer um padrÃo de comparaÃÃo confiÃvel entre os controladores de corrente. Com a finalidade de implementar o sistema de controle de cada motor individualmente e dos motores acoplados ao manipulador utilizou-se um processador digital de sinais.

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Polli, Horácio Beckert. "Controle vetorial indireto de um motor de indução com ligação Scott-T no estator utilizando o observador de modos deslizantes". Universidade do Estado de Santa Catarina, 2012. http://tede.udesc.br/handle/handle/1862.

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Made available in DSpace on 2016-12-12T17:38:32Z (GMT). No. of bitstreams: 1 Horacio B Polli.pdf: 1930439 bytes, checksum: e2cdd47fd6b93e6b07a2e903760c35a4 (MD5) Previous issue date: 2012-11-23
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In this work is shown the study of the modeling and control of a two-phase induction machine with a Scott-T conection in the stator. The proposal is to use this type of motor in setups that uses single-phase induction machines where better efficiency and variable speed are desirable, for example, in appliances. The mathematical model of the motor is dissed and a transformation is presented in order to obtain a symmetrical model of the motor. Following, the indirect vector control and a slide mode observer are discussed. Simulation and experimental results are obtained, and the proposed control technique is analyzed.
Neste trabalho é apresentado um estudo do modelamento e controle de um motor de indução bifásico com uma conexão Scott-T no estator. A proposta é utilizar esse tipo de motor em plataformas que utilizem motores monofásicos e se deseja a melhoria de eficiência e o uso de velocidade variável, como por exemplo, eletrodomésticos. O modelo matemático do motor é discutido e em seguida é apresentada uma transformação que faz com que o motor, a principio assimétrico, se torne simétrico. O controle vetorial indireto é discutido em sequência, assim como o observador de modos deslizantes para estimação de velocidade. Através de resultados de simulação e experimentais a técnica de controle proposta é analisada.

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Pavan, Rayana Siva. "Study of Induction Motor Drive With Indirect Vector Control Using Space Vector Pulse Width Modulation". Thesis, 2017. http://ethesis.nitrkl.ac.in/8946/1/2017_MT_RSPavan.pdf.

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Induction motors are thee starting point to design an electrical drivee system which is widely used in many industrial applications. Inn modern control theory, different mathematical models describe induction motor according to thee employed control methods. Vector control strategy can bee applied to this electrical motor type inn symmetrical three phase version or in unsymmetrical two phase version. The operation of the induction motor can be analyzed similar to a DC motor through this control method. With the Joint progress of thee power electronics and numerical electronics it is possible today to deal with thee axis control with variable speed inn low power applications. With these technological projections, various command approaches have been developed by the scientific community to master inn real time, thee flux and thee torque of thee electrical machines, thee indirect vector control (IVC) scheme being one of the most recent steps in this direction. This scheme provides excellent properties of regulation without rotational speed feedback. Inn this control scheme thee electromagnetic torque and stator flux magnitude are estimated with only stator voltages and currents and this estimation does not depend on motor parameters except for thee stator resistance. Inn this dissertation report conventional IVC scheme has been described. Induction motor has been simulated inn stationary d-q reference frame and its free acceleration characteristics are drawn. Conventional IVC scheme has been simulated with a 50 HP, 460V, 50Hz induction motor. Literature review has been done to study the recent improvements inn IVC scheme which somehow is abe to overcome the drawbacks of conventional one. Thee space vector modulation technique (SVPWM) is applied to 2 level inverter control inn thee vector control based induction motor drivee system, thereby dramatically reducing thee torque ripple. Later inn this project space vector PWM technique will be applied to IVC drivee system to reduce thee torque ripple.

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KUMAR, PANKAJ. "DESIGN AND SIMULATION OF INDIRECT VECTOR CONTROL SCHEME FOR TRACTION MOTOR DRIVE". Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15010.

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Induction motor of large rating are used in traction. This work is focused on developing the effective control strategies and configuration for control of Traction Motor Drive. This work is extended to control the speed and torque of traction motor using current control hysteresis loop controller. The proposed control strategy is analyzed and confirmed by simulation studies of mathematical models used. This work is carried out on 220 kW Traction Motor. Further, indirect vector control for the control of speed of traction motor is used in the present study Much attention has been given to the motor torque and speed control. At the present time, the Vector control has widespread use in high performance traction motor drives. It allows, by means of a co-ordinate transformation, to decouple the electromagnetic torque from the rotor flux, and hence manage speed control of traction motor. The decoupling control between the flux and torque allows traction motor to achieve fast transient response. Field orientation control can be obtained using hysteresis current controller.

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Hwung, Hong-Rong, i 黃烘榮. "Optimal Position Control Of Induction Motor Using Aritificial Intelligence and Indirect Vector-control Techniques". Thesis, 1996. http://ndltd.ncl.edu.tw/handle/64404718390974769318.

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碩士
國立中正大學
電機工程學系
84
This thesis proposes a novel method using artificial intelligence and indirectvector-control techniques for position control of induction motor.The fuzzy phase-plane theory is employed for the design of the controllers.Five controllers are proposed, which are able to achieve good performance underchanges of operating conditions of wide range. The proposed controllers applythe method of genetic algorithms of evolutionary direction operator of improvementtype to requirement of exerting multifarious experiences of expert and proceduresof defuzziness, the controllers can attain more quick response than that of theconventonal fuzzy controllers. What is more, since the output signal of thecontrolls is operated by continues nonlinear function, it is in favor of thedesign of optimal control and the analysis of stability.The control technique using artificial intelligence and indirect vector- controlwere successfully explored and simulated. Simulation results show that theapproach is computationally efficient and has exceedingly good control performance.Furthermore, because of employing the fuzzy phase-plane technique, no transferfunction development is required for the implementation of the method. Thusethe proposed controllers have the advantages of easiness and flexibility fordesign.

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Karmazin, Max. "Simplified fuzzy logic controller based indirect vector control of an induction motor drive /". 2003.

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Patra, Nirupama. "Study of Induction motor drive with Direct Torque Control scheme and Indirect Field Oriented control scheme with Space Vector Modulation". Thesis, 2013. http://ethesis.nitrkl.ac.in/5162/1/211EE2136.pdf.

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Induction motors are the starting point to design an electrical drive system which is widely used in many industrial applications. In modern control theory, different mathematical models describe induction motor according to the employed control methods. Vector control strategy can be applied to this electrical motor type in symmetrical three phase version or in unsymmetrical two phase version. The operation of the induction motor can be analyzed similar to a DC motor through this control method. With the Joint progress of the power electronics and numerical electronics it is possible today to deal with the axis control with variable speed in low power applications. With these technological projections, various command approaches have been developed by the scientific community to master in real time, the flux and the torque of the electrical machines, the direct torque control (DTC) scheme being one of the most recent steps in this direction. This scheme provides excellent properties of regulation without rotational speed feedback. In this control scheme the electromagnetic torque and stator flux magnitude are estimated with only stator voltages and currents and this estimation does not depend on motor parameters except for the stator resistance. In this dissertation report conventional DTC scheme has been described. Induction motor has been simulated in stationary d-q reference frame and its free acceleration characteristics are drawn. Conventional DTC scheme has been simulated with a 50 HP, 460V, 60Hz induction motor. Literature review has been done to study the recent improvements in DTC scheme which somehow is able to overcome the drawbacks of conventional one. The space vector modulation technique (SVPWM) is applied to 2 level inverter control in the vector control based induction motor drive system, thereby dramatically reducing the torque ripple. Later in this project space vector PWM technique will be applied to DTC drive system to reduce the torque ripple. II

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Charanteja, Rongali. "Comparative Analysis of Hysteresis Current Control and SVPWM on FLC based Indirect Vector Controlled Induction Motor Drive". Thesis, 2018. http://ethesis.nitrkl.ac.in/9647/1/2018_MT_216EE4299_RCharanteja_Comparative.pdf.

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Over the years,Induction motors (IM) are widely used in many industrial applications as workhorse, because of its advantages such as simple and robust in construction, highly reliable and capability of working in extreme conditions. However, as compared to DC motor speed control of IM is complex due to coupling between flux and torque components of currents. Speed of IM controlled either by scalar control technique or by vector control technique. Scalar control technique is preferred in many applications for speed control of IM due to its simplicity. In scalar control, speed control of IM obtained by regulating magnitudes of stator voltage and frequency. However, this technique suffers with poor dynamic response. To enhance dynamic response, vector control technique preferred for speed control of IM. With vector control technique, IM behaves like a separately controlled DC motor. However, this technique employs coordination transformations, modulation techniques and current controllers. Vector control technique classified into two categories based on unit vector generation named as direct vector control and indirect vector control. In direct vector control technique, unit vector estimated using hall sensors. However, placing these sensors on stator poles is difficult. Indirect vector control overcomes these drawbacks. Proportional-Integral (PI) controller used in indirect vector controlled IM drive to control speed. However, this PI controller requires accurate gain values for better performance. As operating conditions changes, tuning of PI controller gains required for high performance IMD. Moreover, PI controller is unable perform satisfactorily with load torque and speed changes. Therefore, fuzzy logic controller (FLC) used to replace PI speed controller. FLC is simple to implement without any mathematical equations. Modulation techniques required to produce gating pulses for inverter switches. Modulation techniques broadly classified into two categories such as voltage and current control methods. Voltage control again subdivided as sinusoidal pulse width modulation (SVPWM), space vector pulse width modulation (SVPWM) techniques. Similarly, current control divided into hysteresis and delta control. Among all these techniques, SVPWM and Hysteresis control techniques are preferred in high power applications. Hysteresis control is simple and can give fast response but it suffered with variable operating switching frequency. SVPWM technique can give good steady state response with fixed switching frequency.

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Książki na temat "INDIRECT VECTOR CONTROL"

Prussing, John E. Optimal Trajectories. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198811084.003.0005.

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Optimal trajectories are analysed, covering both constant- and variable-specific-impulse cases. Primer vector is defined and illustrated. The first-order necessary conditions for an optimal constant-specific-impulse (CSI) trajectory were first derived by Lawden using classical Calculus of Variations. Variable-specific-impulse rocket engines are discussed with the cost functional for a VSI engine. In the derivation that follows, an Optimal Control Theory formulation is used, but the derivation is similar to that of Lawden. One difference is that the mass is not defined as a state variable, but is kept track of indirectly.

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Części książek na temat "INDIRECT VECTOR CONTROL"

Joshi, Girisha, i Pinto Pius A J. "Fuzzy Logic Controller for Indirect Vector Control of Induction Motor". W Lecture Notes in Electrical Engineering, 519–34. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0626-0_40.

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Imtiyaz, Tanzeel, Anupama Prakash, Farhad Ilahi Bakhsh i Anjali Jain. "Modelling and Analysis of Indirect Field-Oriented Vector Control of Induction Motor (IM)". W Lecture Notes in Electrical Engineering, 215–28. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7393-1_18.

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Venu Gopal, B. T., E. G. Shivakumar i H. R. Ramesh. "An Experimental Setup for Implementation of Fuzzy Logic Control for Indirect Vector-Controlled Induction Motor Drive". W Lecture Notes in Electrical Engineering, 193–203. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4676-1_18.

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Wang, Kang, Qingzhang Chen i Zhengyi Wang. "Simulation Analysis of Rotor Indirect Field Oriented Vector Control System for AC Induction Motor in Low Speed Electric Vehicles". W Lecture Notes in Electrical Engineering, 391–404. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5768-7_42.

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Chetouani, Elmostafa, Youssef Errami, Abdellatif Obbadi i Smail Sahnoun. "Backstepping and Indirect Vector Control for Rotor Side Converter of Doubly Fed-Induction Generator with Maximum Power Point Tracking". W Digital Technologies and Applications, 1711–23. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73882-2_155.

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Ryan, Sadie J., Catherine A. Lippi, Kevin L. Bardosh, Erika F. Frydenlund, Holly D. Gaff, Naveed Heydari, Anthony J. Wilson i Anna M. Stewart-Ibarra. "Direct and Indirect Social Drivers and Impacts of Vector-Borne Diseases". W Population Biology of Vector-Borne Diseases, 247–66. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198853244.003.0014.

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Vector borne diseases (VBDs) are often seen by the highly developed nations of the world as an issue of poor tropical countries. While framing the problem this way—through the paradigm of a poverty-trap—may leverage aid and motivate political will toward disease control, it misses a wide range of socio-political contexts both driving, and driven by, vector borne diseases. In this chapter, we present a series of global vignettes, to illustrate different facets of the broad remit of social drivers and interactions with VBDs. We approach the urban social-ecological context in Latin America and the Caribbean, impacts and aftermath of natural disasters such as earthquakes and tropical storms, struggles with trust in intervention implementation in Haiti, and drivers and impacts of ruminant arbovirus emergence events in Europe. We conclude that incorporating an understanding of social context, including political history and cultural perceptions, is a key part of VBD research and intervention practice.

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"Indirect Power Control (IDPC) of DFIG Using Classical & Adaptive Controllers Under MPPT Strategy". W Improved Indirect Power Control (IDPC) of Wind Energy Conversion Systems (WECS), redaktorzy Fayssal Amrane i Azeddine Chaiba, 26–85. BENTHAM SCIENCE PUBLISHERS, 2019. http://dx.doi.org/10.2174/9789811412677119010005.

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In this chapter, we present a comparative study of conventional Indirect Power Control (IDPC) algorithm of DFIG-Wind turbine in grid-connection mode, using PI and PID controllers via Maximum power point tracking (MPPT) strategy. Firstly, the conventional IDPC based on PI controllers will be described using simplified model of DFIG through stator flux orientation and wind-turbine model. The MPPT strategy is developed using Matlab/Simulink® with two wind speed profiles in order to ensure the robustness of wind-system by maintaining the Power coefficient (Cp) at maximum value and reactive power at zero level; regardless unexpectedF wind speed variation. Secondly, the rotor side converter (RSC) and Grid side converter (GSC) are illustrated and developed using Space vector modulation (SVM) in order to minimize the stress and the harmonics and to have a fixed switching frequency. In this context, the switching frequency generated by IDPC to control the six IGBTs of the inverter (RSC), and this control algorithm works under both Sub- and Supersynchronous operation modes and depending to the wind speed profiles. The quadrants operation modes of the DFIG are described in details using real DFIG to show the power flow under both modes (motor and generator in the four (04) quadrants. Finally, the conventional IDPC have several drawbacks as: response time, power error and overshoot. In this context, the PID and MRAC (adaptive regulator) controllers are proposed instead of the PI to improve the wind-system performances via MPPT strategy with/without robustness tests. The obtained simulation results under Matlab/Simulink® show high performances (in terms of power error, power tracking and response time) in steady and transient states despite sudden wind speed variation, whereas big power error and remarkable overshoot are noted using robustness tests, so the proposed IDPC can not offer big improvement under parameter variation.

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Dabour, Sherif, Mohamed Hussien, Ahmed Aboushady i Mohamed E. Farrag. "Sensorless Speed Observer for Industrial Drives based Induction Motors with Low Complexity". W Induction Motors - Recent Advances, New Perspectives and Applications [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1001150.

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This chapter presents a simple method to efficiently predict the rotor speed for a sensorless vector control technique applied to induction motors (IMs). The motor is supplied by a Simplified Split-Source Inverter (S3I), which provides dc-boosting and ac-inversion processes during input voltage sag. It also has a wider modulation range and a lower harmonic content than conventional boosting inverters. With this contribution, it is possible to efficiently estimate the rotor position directly without needing a PI controller with fluctuated supply voltage. The proposed strategy can be divided into three parts. The first uses a dual-loop controller to obtain the reference DC-boosted voltage of the SSI and regulate the input current. The second is the suggested observer for speed detection, which is derived from the principles of phase axis relations of the adopted machine currents and the indirect rotor flux orientation control (IRFOC) approach. With a newly developed space vector modulation, the third part will generate the switching pulses of the inverter switches. A complete analysis has been conducted to ensure the observability of the proposed technique. A series of PLECS simulations were conducted to verify the concept. The obtained results validate the proposed strategy with the S3I topology.

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Rosario Cruz, Rodrigo, Delia Inés Domínguez García, Saúl López Silva i Fernando Rosario Domínguez. "Integrated Management of the Cattle Tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) and the Acaricide Resistance Mitigation". W Insecticides [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.100015.

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Resistance to insecticides is one of the major obstacles to the control of agricultural pests, as well as species important to human and veterinary health. The World Health Organization has called insecticide resistance “the great little obstacle against vector-borne diseases”. Rhipicephalus (Boophilus) microplus is one of the most important vector, transmitting diseases to cattle such as anaplasmosis and babesiosis. These diseases cause great economic losses that significantly increased because of the appearance of tick populations resistant to acaricides, as a result of the intensive use of pesticides. Resistance to ixodicides in Latin America is a growing problem, since control of disease-transmitting ticks, depends heavily on the use of pesticides. In Mexico, the resistance of R. microplus to organophosphate compounds, pyrethroids, and recently amidines, has been detected in some areas, affected by multiple acaricide resistance to the three families of ixodicides. The cattle tick R. microplus in addition to the great ecological impact represents the most expensive pest for livestock in Mexico, since the producers are directly affected by this tick, due to the decrease in the production of meat, milk and damage to the skin, as well as the indirect damage, such as the transmission of diseases, including Anaplasmosis and Babesiosis, which, in turn, represents a serious limitation for the introduction of specialized cattle in endemic areas. Therefore, the use of integrated management programs is a mandatory issue that should be implemented in all those areas affected by this parasite.

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Petersen, Wesley, i Peter Arbenz. "SIMD, Single Instruction Multiple Data". W Introduction to Parallel Computing. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198515760.003.0008.

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The single instruction, multiple data (SIMD) mode is the simplest method of parallelism and now becoming the most common. In most cases this SIMD mode means the same as vectorization. Ten years ago, ve ctor computers were expensive but reasonably simple to program. Today, encouraged by multimedia applications, vector hardware is now commonly available in Intel Pentium III and Pentium 4 PCs, and Apple/Motorola G-4 machines. In this chapter, we will cover both old and new and find that the old paradigms for programming were simpler because CMOS or ECL memories permitted easy non-unit stride memory access. Most of the ideas are the same, so the simpler programming methodology makes it easy to understand the concepts. As PC and Mac compilers improve, perhaps automatic vectorization will become as effective as on the older non-cache machines. In the meantime, on PCs and Macs we will often need to use intrinsics ([23, 22, 51]). It seems at first that the intrinsics keep a programmer close to the hardware, which is not a bad thing, but this is somewhat misleading. Hardware control in this method of programming is only indirect. Actual register assignments are made by the compiler and may not be quite what the programmer wants. The SSE2 or Altivec programming serves to illustrate a form of instruction level parallelism we wish to emphasize. This form, SIMD or vectorization, has single instructions which operate on multiple data. There are variants on this theme which use templates or macros which consist of multiple instructions carefully scheduled to accomplish the same objective, but are not strictly speaking SIMD, for example see Section 1.2.2.1. Intrinsics are C macros which contain one or more SIMD instructions to execute certain operations on multiple data, usually 4-words/time in our case. Data are explicitly declared mm128 datatypes in the Intel SSE case and vector variables using the G-4 Altivec. Our examples will show you how this works. Four basic concepts are important: Consistent with our notion that examples are the best way to learn, several will be illustrated: • from linear algebra, the Level 1 basic linear algebra subprograms (BLAS) — vector updates (-axpy) — reduction operations and linear searches • recurrence formulae and polynomial evaluations • uniform random number generation.

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Streszczenia konferencji na temat "INDIRECT VECTOR CONTROL"

Osorio, Joycer, Pedro Ponce i Arturo Molina. "Electric Vehicle Powertrain Control with Fuzzy Indirect Vector Control". W 2012 11th Mexican International Conference on Artificial Intelligence (MICAI). IEEE, 2012. http://dx.doi.org/10.1109/micai.2012.33.

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Wade, S. "Comparison of stochastic and deterministic parameter identification algorithms for indirect vector control". W IEE Colloquium on Vector Control and Direct Torque Control of Induction Motors. IEE, 1995. http://dx.doi.org/10.1049/ic:19951109.

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Beran, Leos, i Martin Diblik. "Indirect torque measurement using industrial vector control frequency converter". W 2016 17th International Carpathian Control Conference (ICCC). IEEE, 2016. http://dx.doi.org/10.1109/carpathiancc.2016.7501065.

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Kumari, Rajni, i Ratna Dahiya. "Speed control of solar water pumping with indirect vector control technique". W 2018 2nd International Conference on Inventive Systems and Control (ICISC). IEEE, 2018. http://dx.doi.org/10.1109/icisc.2018.8399039.

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Arya, S., i G. K. Nisha. "Indirect Space Vector Modulation Based Three Phase Matrix Converter". W 2018 International CET Conference on Control, Communication, and Computing (IC4). IEEE, 2018. http://dx.doi.org/10.1109/cetic4.2018.8531014.

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Zeb, Kamran, Ayesha, Aun Haider, Waqar Uddin, M. Bilal Qureshi, C. A. Mehmood, Ahmad Jazlan i Victor Sreeram. "Indirect Vector Control of Induction Motor using Adaptive Sliding Mode Controller". W 2016 Australian Control Conference (AuCC). IEEE, 2016. http://dx.doi.org/10.1109/aucc.2016.7868216.

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Kar, Biranchi Narayan, K. B. Mohanty i Madhu Singh. "Indirect vector control of induction motor using fuzzy logic controller". W 2011 10th International Conference on Environment and Electrical Engineering (EEEIC). IEEE, 2011. http://dx.doi.org/10.1109/eeeic.2011.5874782.

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Motlagh, Shila, i Seyed Saeed Fazel. "Indirect vector control of linear induction motor considering end effect". W 2012 3rd Power Electronics, Drive Systems & Technologies Conference (PEDSTC). IEEE, 2012. http://dx.doi.org/10.1109/pedstc.2012.6183324.

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Kar, B. N., S. Choudhury, K. B. Mohanty i M. Singh. "Indirect vector control of induction motor using sliding-mode controller". W International Conference on Sustainable Energy and Intelligent Systems (SEISCON 2011). IET, 2011. http://dx.doi.org/10.1049/cp.2011.0415.

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Ranga, K. Pandu, G. Durga Sukumar, B. Pakkiraiah i M. Subba Rao. "Neuro fuzzy based indirect vector control doubly fed induction generator". W 2016 7th India International Conference on Power Electronics (IICPE). IEEE, 2016. http://dx.doi.org/10.1109/iicpe.2016.8079393.

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Raporty organizacyjne na temat "INDIRECT VECTOR CONTROL"

Gottlieb, Yuval, Bradley Mullens i Richard Stouthamer. investigation of the role of bacterial symbionts in regulating the biology and vector competence of Culicoides vectors of animal viruses. United States Department of Agriculture, czerwiec 2015. http://dx.doi.org/10.32747/2015.7699865.bard.

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Symbiotic bacteria have been shown to influence host reproduction and defense against biotic and abiotic stressors, and this relates to possible development of a symbiont-based control strategy. This project was based on the hypothesis that symbionts have a significant impact on Culicoides fitness and vector competence for animal viruses. The original objectives in our proposal were: 1. Molecular identification and localization of the newly-discovered symbiotic bacteria within C. imicola and C. schultzei in Israel and C. sonorensis in California. 2. Determination of the prevalence of symbiotic bacteria within different vector Culicoides populations. 3. Documentation of specific symbiont effects on vector reproduction and defense: 3a) test for cytoplasmic incompatibility in Cardinium-infected species; 3b) experimentally evaluate the role of the symbiont on infection or parasitism by key Culicoides natural enemies (iridescent virus and mermithid nematode). 4. Testing the role(s) of the symbionts in possible protection against infection of vector Culicoides by BTV. According to preliminary findings and difficulties in performing experimental procedures performed in other insect symbiosis systems where insect host cultures are easily maintained, we modified the last two objectives as follows: Obj. 3, we tested how symbionts affected general fitness of Israeli Culicoides species, and thoroughly described and evaluated the correlation between American Culicoides and their bacterial communities in the field. We also tried alternative methods to test symbiont-Culicoides interactions and launched studies to characterize low-temperature stress tolerances of the main US vector, which may be related to symbionts. Obj. 4, we tested the correlation between EHDV (instead of BTV) aquisition and Cardinium infection. Culicoides-bornearboviral diseases are emerging or re-emerging worldwide, causing direct and indirect economic losses as well as reduction in animal welfare. One novel strategy to reduce insects’ vectorial capacity is by manipulating specific symbionts to affect vector fitness or performance of the disease agent within. Little was known on the bacterial tenants occupying various Culicoides species, and thus, this project was initiated with the above aims. During this project, we were able to describe the symbiont Cardinium and whole bacterial communities in Israeli and American Culicoides species respectively. We showed that Cardinium infection prevalence is determined by land surface temperature, and this may be important to the larval stage. We also showed no patent significant effect of Cardinium on adult fitness parameters. We showed that the bacterial community in C. sonorensis varies significantly with the host’s developmental stage, but it varies little across multiple wastewater pond environments. This may indicate some specific biological interactions and allowed us to describe a “core microbiome” for C. sonorensis. The final set of analyses that include habitat sample is currently done, in order to separate the more intimately-associated bacteria from those inhabiting the gut contents or cuticle surface (which also could be important). We were also able to carefully study other biological aspects of Culicoides and were able to discriminate two species in C. schultzei group in Israel, and to investigate low temperature tolerances of C. sonorensis that may be related to symbionts. Scientific implications include the establishment of bacterial identification and interactions in Culicoides (our work is cited in other bacteria-Culicoides studies), the development molecular identification of C. schultzei group, and the detailed description of the microbiome of the immature and matched adult stages of C. sonorensis. Agricultural implications include understanding of intrinsic factors that govern Culicoides biology and population regulation, which may be relevant for vector control or reduction in pathogen transmission. Being able to precisely identify Culicoides species is central to understanding Culicoides borne disease epidemiology.

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Lopez Boo, Florencia, Laura Goyeneche, Marta Rubio-Codina i William D. Savedoff. Abierta configuration options El COVID-19 en los niños menores de 18 años. Inter-American Development Bank, czerwiec 2022. http://dx.doi.org/10.18235/0004279.

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sta nota resume la evidencia sobre el impacto directo e indirecto del COVID-19 en los niños menores de 18 años. En primer lugar, se proveen cifras actualizadas para América Latina y el Caribe sobre la tasa de contagio y su severidad en esta población. Luego, se muestran las tasas de vacunación pediátrica actuales, así cómo y con qué vacunas se recomienda vacunar. Por último, se analiza el impacto de la pandemia en la salud, desarrollo físico, mental, socioemocional y el aprendizaje. A nivel global, el contagio en niños y adolescentes ha sido menor que en adultos, incluso para las nuevas variantes más transmisibles del virus. Lo mismo ha ocurrido con las tasas de morbilidad, incluso de largo plazo, hospitalización y mortalidad. Si bien la evidencia a la fecha no es concluyente en torno al rol de niños y adolescentes como vectores de transmisión, existe cada vez mayor consenso sobre la eficacia de las vacunas limitar su sintomatología, con niveles de efectividad similares a los de los adultos. La vacunación pediátrica recién se lanza en algunos países de la región, pero otros ya han vacunado una buena proporción de esta población. Esto tiene implicancias importantes para la operación de centros de desarrollo infantil, prescolares y escuelas. Su cierre fue una de las primeras medidas de control que muchos países tomaron para evitar la propagación del virus. En buena parte de la región, estos cierres han sido los más largos del planeta. La evidencia compilada sugiere que estos cierres prolongados no han sido una medida particularmente eficaz para controlar la transmisión del virus. Esto, combinado con sus nefastos impactos en el desarrollo, el aprendizaje y la salud socioemocional de los niños urgen a la pronta remediación de las pérdidas de aprendizaje y de salud mental.

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