Engineering Commons^™

Over Look To Genetic Algorithm, Ata Jahangir Moshayedi

Ata Jahangir Moshayedi

Over look to Genetic algorithm

Direct Power Control Of Dfigs Based Wind Energy Generation Systems Under Distorted Grid Voltage Conditions, Emad Gameil Shehata E. G. Shehata

Emad Gameil Shehata E. G. Shehata

This paper presents an improved direct power control (DPC) strategy of a wind turbine driven doubly fed induction generators (DFIGs) connected to distorted grid voltage conditions. A coordinate control strategy of the grid side converter (GSC) and rotor side converter (RSC) of the DFIG is designed to improve the overall scheme performance. The RSC is controlled based on a DPC principle to eliminate the electromagnetic torque and stator reactive power oscillations. The total active and reactive power oscillations are compensated by the GSC control to achieve constant active and reactive powers from the overall DFIG system. A current control scheme …

Fabricate A 2.4-Ghz Fractional-N Synthesizer, Hossein Ameri Mahabadi, Mahmoud Moghavvemi, A Attaran

Hossein Ameri Mahabadi

No abstract provided.

A 6-U Commercial Constellation For Space Solar Power Supply To Other Spacecraft, Corey Bergsrud, Jeremy Straub

Jeremy Straub

This poster presents early stage planning for a constellation

of 6-U CubeSats which will collect power from

the sun and supply it to other spacecraft in Earth orbit. Unlike

solar panels (which have a known decay rate), antenna

systems (such as would be required to receive microwavetransmitted

power) do not substantially decay over the

typical (or prospectively extended, under this model)

spacecraft lifetime. This allows a spacecraft to be built for

long-term operations (utilizing an electric propulsion technology

and/or a greater supply of conventional propellant)

and receive power from a lower-cost utility provider

spacecraft, which can be replaced on a …

Novel Three-Phase Asymmetrical Cascaded Multilevel Voltage Source Inverter, Saad Mekhilef

Saad Mekhilef

Series connection of power cells in asymmetrical cascaded configurations helps to cancel redundant output levels and maximise the number of different levels generated by the inverter. A new configuration of three-phase multilevel asymmetrical cascaded voltage source inverter is presented. This structure consists of series-connected sub-multilevel inverters blocks. The number of utilised switches, insulated gate driver circuits, voltage standing on switches, installation area and cost are considerably reduced. Cascaded-cell DC voltages in each inverter leg form an arithmetic sequence with common difference of E. With the selected inverter DC sources, high-frequency pulse-width modulation (PWM) control methods can be effectively applied without …

Optimal Control Of A Grid Connected Photovoltaic System With Constant Switching Frequency, Djamila Rekioua Pr

REKIOUA Djamila Dr

This paper presents maximum power point tracking (MPPT) algorithms for grid connected photovoltaic system. Due to the instantaneous changing of solar irradiance and temperature, it is desirable to determine the optimal voltage that ensures maximum energy yield. In order to optimize the photovoltaic energy generation, the MPPT is integrated in the inverter control. Perturb & Observ (P&O), Incremental Conductance (Inc Cond) techniques and fuzzy logic controller (FLC) are applied. A comparison shows the effectiveness of the FLC. The maximum power generated by the photovoltaic system is sent to the power grid to be consumed by the nearest customers. A constant …

At89c51 Microcontroller Based Control Model For Hybrid Assistive Limb (Knee ), Suresh L

suresh L

In this paper, a controlling system is implemented for a wearable walking supporting device so called as Hybrid Assistive Limb. The control circuit is implemented without considering the biological signals of the human body for the knee part, which is based on the knee joint moment from the human body model. The control and a driving circuit s are implemented to assistive the knee as for the requir ement of knee joint dynamics.

Determining Planck's Constant Using Leds, Zechariah Thurman

Zechariah Thurman

In this paper a value for Planck's constant is measured. The value found with this experiment is within two sigma of the accepted value, this constitutes reasonable agreement with theory for the purposes of this experiment.

Desarrollo De Modelos Adaptivos Para El Procesamiento Digital De Señales Multiespectrales De Percepción Remota Y Su Implementación Como Software De Alto Desempeño, Dr. Iván Esteban Villalón Turrubiates

Iván Esteban Villalón Turrubiates

El Objetivo General de este Proyecto es Investigar y desarrollar nuevos paradigmas computacionales (metodologías y algoritmos) para el procesamiento digital de señales obtenidas por sistemas multiespectrales de percepción remota, por medio de técnicas de inteligencia artificial y computación distribuida para obtener un diseño robusto y adaptivo que pueda ser implementado a nivel software y a nivel hardware.