design of a real coded ga based fuzzy controller for speed control of a brushless dc motor
A park like transformation for the study and the control of a nonsinusoidal brushless DC motor
... 111 PARK-LIKE TRANSFORMATION FOR NON-SINUSOIDAL BDCM Although an appropriate nonlinear coordinate transformation for motors with sinusoidal emf has been found (the so-called Park transformation), ... advantages as the Park transformation A Mathematical Model of the BDCM We suppose that the motor has the following typical features : - The airgap length is constant and large since the magnets are ... self-inductance and the mutualinductance of the stator coils Since we assume a constant airgap and no saturation, L, and M, are constant ara arb , and arc the rotor fluxes induced in the stator phases are...
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Direct torque control of brushless DC motor with non sinusoidal back EMF
... Ypr/ are obtained by taking the integral of both sides of Fig Actual and ideal (dashed-line) stator flux linkage trajectories, representation of two-phase voltage space vectors, and placement of ... change may vary with sampling time, dc- link voltage, hysteresis bandwidth, motor parameters especially the phase inductance, motor speed, snubber circuit, and the amount of load torque If a BLDC ... Proper A change in the torque can be achieved by keeping the amplitude of the stator flux linkage constant and increasing the rotational speed of the stator flux linkage as fast as possible This allows...
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Direct torque and indirect flux control of brushless DC motor with non sinusoidal back EMF without position sensor
... frame are not constant, therefore current wave shapes require very fast controllers in particular at high speed Classical bandwidth of the controller (such as proportional– integral) does not allow ... region ids was controlled as zero and in the flux-weakening region it was decreased for a certain amount depending on the operational speed to achieve maximum torque.The switching table for controlling ... three-phase conduction DTC of a BLDC motor drive when * is changed from A to -1 A under 0.5 N.m load torque, (a) d-axis r ids stator current, (b) stator flux locus Table Parameters of BLDC motor...
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Direct torque and indirect flux control of brushless DC motor
... line-to-line Clarke transformation from the balanced three-phase quantities is derived and, then the line-to-line Park transformation forming a × matrix instead of a × matrix for three-phase systems can ... line-to-line back EMF waveforms eba (θr e ) and eca (θr e ) are obtained of ine and converted to the ba–ca frame back EMF constants kba (θr e ) and kca (θr e ) The line-to-line Park transformation matrix ... [17] I J Ha and C I Kang, “Explicit characterization of all feedback linearizing controllers for a general type of brushless dc motor, ” IEEE Trans Autom Control, vol 39, no 3, pp 673–677, Mar 1994...
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Direct torque control of four switch brushless DC motor with non sinusoidal back EMF
... influence of the unexcited openphase back-EMF causes each straight side of the ideal hexagonal shape of the stator flux linkage locus to be curved and the actual stator flux linkage trajectory ... similar to the DTC of a PMSM drive Unlike BLDC motor, in PMSM since both – and –axis motor backEMFs are in sinusoidal shape, constant stator flux linkage amplitude is obtained However, for BLDC motor, ... to eliminate the low-frequency torque oscillations caused by the non-ideal trapezoidal shape of the actual back-EMF waveform of the BLDC motor, a pre-stored back-EMF versus electrical rotor position...
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FPGA BASED SVPWM CONTROLLER FOR THREE PHASE AC AC MATRIX CONVERTER
... 2004 [8] J Vadillo, J M Echeverria, A Galarza and L Fontan, “Modelling and Simulation of Space Vector Modulation Techniques for Matrix Converters: Analysis of different Switching Strategies” Proceedings ... casadei - G.gandi – G.serra – A. Tani, “Space vector control of matrix converters with unity input power factor and sinusoidal input/ouput waveforms” 1993 European Power Electronics Association [4] ... A Alesina, M Venturini, “Analysis and Design of OptimumAmplitude Nine-Switch Direct AC-AC Converters”, IEEE Transactions on Power Electronics, Vol 4, no 1, pp.101-112, January 1989 [3] D casadei...
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Artificial neural network based adaptive controller for DC motors
... Σ ANN v*c(n) ref (n+1) a1 a2 Figure 3.1 Block diagram for the ANN based Adaptive Controller Artificial neural network based adaptive controller for DC motors 24 Chapter ANN based Adaptive Controller ... of Artificial neural network based adaptive controller for DC motors 28 Chapter ANN based Adaptive Controller weights and biases of the ANN, an adaptive learning rate is introduced in our ANN controller ... the information gathered Most adaptive controllers can be divided into two main classes: feedforward adaptive controllers and feedback adaptive controllers Artificial neural network based adaptive...
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Tài liệu Báo cáo khoa học: "DESIGN OF A KNOWLEDGE-BASED REPORT GENERATOR" doc
... nature of these grammar rules and their use of the lexicon, they may be viewed as a high-level variant of a lexical functional grammar The efficacy of a low-level functional grammar for text generation ... demonstrated that not only does naturally generated text disclose the lexicon and grammar of a sublanguage, but it also reveals the essential semantic classes and attributes of a domain of discourse, ... examples of control elements that are used for syntactic tailoring A syntactic form parameter may be preset at any value between and 11 by the system user A value of 8, for example, would result in an...
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Báo cáo hóa học: "Research Article Experimental Investigation of Cooperative Schemes on a Real-Time DSP-Based " docx
... should be the same as in a case where synchronisation had occurred in a dedicated synchronisation phase The air interface employed for payload data is the same as for AF and DF, that is, 48 symbols, ... channel estimation though), and therefore we can calculate the BER also based on this data When we calculate the duty cycle we assume that these symbols were actually carrying payload data The results ... all the available power can be used for this purpose, while payload data would be transmitted on multiple subcarriers using only a fraction of the total available power used for a given subcarrier...
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application of real coded genetic algorithm for ship hull surface fitting with a single non-uniform b-spline surface
... Chiyokura and Kimura (1984) As a result, boundary interpolating patch has several drawbacks for modification a large number of small surfaces that are bonded together to create a larger surface 2.2 ... the GA has been used as a major tool to search for optimal boundary curves and to fit a surface A preliminary hull surface is assumed to be a gene type The encoded design variables for surface ... the stations into a surface model and take advantage of the capabilities of hull surface modeling, compare it to the target offsets, and refine it as necessary until a satisfactory match is achieved...
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Design and performance evaluation of energy aware DVS based scheduling strategies for hard real time embedded multiprocessor systems
... medical and healthcare industry [6, 11], there are also applications that not only require hard real- time performance, but also low energy consumption as well For example, an implantable pacemaker ... compromising the performance Hard real- time applications have strict deadline requirements and any deadline misses may lead to total system failures For example, a nuclear control and monitoring system ... literature that considers task mapping, task ordering and voltage scaling at the same time Leung et al [40] formulate the whole problem of task mapping, task ordering and voltage scaling as a mixed...
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Brake-Based Wheel Speed Control Design of a Rear Wheel Open Differential Vehicle by Eli Jeon
... the surface actually decreases in a skid ABS was developed to prevent the occurrence of skidding situations The brakes of an ABS are applied in a manner that keeps the traction force at the most ... primary brakes of this system are a conventional setup of master and slave cylinders with a brake pedal that is actuated by the driver’s foot The conventional brakes are hooked up to the primary ... calculating the controllability matrix, C., it can be shown that the system states, in this case rear wheel speeds, are controllable According to control theory [4], the number of states that are controllable...
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Novel design of a compacted micro-structured air-breathing PEM fuel cell as a power source for mobile phones
... can be seen that for a high nominal current density, a high fraction of the current is generated at the catalyst layer near the air inlet area, leading to under-utilization of the catalyst at ... performance and design of air-breathing PEM fuel cells Litster and Djilali [1] developed a single-phase one-dimensional semi-analytical model of the membrane electrode assembly (MEA) of planar air-breathing ... However, these fuel cell designs have generally relied on traditional planar MEA architecture Because the majority of PEM fuel cell designs are based on planar plate and frame architecture, their...
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Optimal design of PEM fuel cells to generate maximum power: A CFD study
... The material parameters, cell design, and cell operating conditions that give optimal performance depend on the application area Stationary, portable, and transportation applications all have ... model has been performed and discussed in detail The study quantifies and analyses the impact of operating, design, and material parameters on fuel cell performance and get an optimal design for ... power at various operating conditions is compared at constant nominal current density The performance characteristics of the fuel cell based on a certain parameter can be obtained by varying that...
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Novel design of a disk-shaped compacted micro-structured air-breathing PEM fuel cell
... distribution patterns of activation overpotentials are similar, with higher values at the catalyst layer near the air inlet area It can be seen that the activation overpotential profile correlates with ... performance and design of air-breathing PEM fuel cells Litster and Djilali [1] developed a single-phase one-dimensional semi-analytical model of the membrane electrode assembly (MEA) of planar air-breathing ... However, these fuel cell designs have generally relied on traditional planar MEA architecture Because the majority of PEM fuel cell designs are based on planar plate and frame architecture, their...
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Tài liệu Design of a USB Device Driver ppt
... Driver USB Host Data Packet IN Token Data Packet Data Buffer ACK Data Packet IN Token Data Packet ACK 36 18 Control Read ? Call USBRead( EP0 ) to read a Setup Packet USBRead( –Read from EP0 OUT ... DATA SET OUT T/O NAK STALL Idle Handshake ACK ACK DATA0/ DATA0/ DATA1 DATA1 NAK DATA0 T/O STALL T/O ACK Idle Host Function There are Four Types of USB Transactions ? Isochronous (Audio, telephony ... –First packet in any transaction –Specifies function address, endpoint –Specifies data direction ? Data - DATA0, DATA1 –0 - 1023 bytes ? Handshake - ACK, NAK, STALL –Report status of data transaction...
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Tài liệu Design Of Fuzzy Controllers doc
... realisations of fuzzy controllers are described: a table -based controller, an input-output mapping and a Takagi-Sugeno type controller A short section summarises the main design choices in a simple ... which translate into unrealistically small magnitudes of the gain factors in order to guarantee stability Another possibility is to approximate the fuzzy controller with a linear controller, and ... Disturbance F Fuzzy compensator Deviation + + Sum C Controller u Figure 2: Feedforward control Controller parameters Fuzzy gain schedule Ref Controller Process Figure 3: Fuzzy parameter adaptive control...
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Tài liệu Design of a Powerline Home Automation System pdf
... to ground, neutral to live and neutral to ground Neutral to ground has the advantage of safety, but also the disadvantage of the fact that neutral is usually grounded at the transformer, so no ... important to understand the channel well, as it is a harsh environment for signals to propagate in In a medium that carries any amount of noise, it is possible to transmit data reliably (that is, ... basic limitation that noise causes in a communication channel is not on the reliability of communication, but on the speed of communication.” The channel capacity of an additive white Gaussian...
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- design of a program
- design of a usb device driver
- the design of a computer language
- design of a machine
- design of a knowledgebased
- design of a simple machine
- brushless dc motor speed control circuit design
- design of a knowledge based system
- a framework for the design of web service based clinical management systems to support inter and intra organizational patient journeys
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- 2 barker r m pucket j a design of highway bridges based on aashto lrfd bridge design specifications 2007
- design of a fuzzy temperature controller
- drive via a fuzzy logic controller for speed regulation
- type approval requirements for beacons based on design of a type approved 406 mhz distress beacon
- hiv aids a structure based approach to the design of new therapeutics
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