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This paper presents a comparative study between two control solutions developed for a boost converter. The first one is a P.I. controller developed using a linear model for the converter and implemented in Matlab/Simulink. The second one is a fuzzy controller which takes into account the error between the reference voltage and converter's output and also the integral of this error. Fuzzy controller...
In this paper is presented a new mathematical model for the continuous conduction mode of the boost converter. There are taken into account the medium values for the currents and voltages in order to obtain a model useful for the design process of a controller for this converter. The obtained mathematical model is non-linear and it is linearized such that it permits to design a P.I.D. controller....
In this paper is presented the implementation in MULTISIM and numerical simulation analysis of a DC to DC boost converter with two parallel stages. For the boost converter with two stages in parallel implemented in this paper input voltage is 24 VDC and output voltage 48 VDC at a maximum power of 1.7 kW. The switching frequency was set about 10 kHz. The implementation scheme in Multisim has two stages...
This paper presents a combined boost converter solution which is made of two power stages in series. The first stage is a two interleaved stages boost converter with constant duty cycle and the second stage is a simple boost converter with variable duty cycle. The voltage controller of the second stage is P.I.D. DC to DC boost converter scheme was implemented in MULTISIM and numerically simulated...
In this paper is optimized by numerical simulations a dc to dc boost converter with two parallel stages using the interleaved command technique. A comparative study between three converter topologies — one stage, two parallel stages and two interleaved stages is presented. First, the interleaved command converter is modeled in MULTISIM and is tested under many output loads. For comparison, simulations...
In order to use dc to dc boost converter in combination with a fuel cell, for modern aircraft APU, it is important that the input current ripples to be very small. This paper presents a comparative analysis of a dc to dc boost converter with variable duty cycle and one with constant duty cycle. The Dc to dc boost converter proposed was modeled in Multisim, with a PID controller. After numerical simulations...
This paper presents an overview of several converter topologies used in practice and also their digital command. A special attention is given to digital control based on microcontroller. We choose this option because we can implement different strategies like fuzzy, neuro-fuzzy and sliding mode. Also, this kind of digital control can be integrated along with the converter into a computer controlled...
This paper presents a simulation model for a DC to DC boost converter. The simulation model was accomplished in MULTISIM 12 and represents in fact the electronic scheme which was manufactured experimentally in the Avionics Laboratory of our faculty. The converter amplifies the 24 VDC input to 48 VDC output, with a maximum power of 500 W. This converter can be used in the aero-spatial domain, on satellites,...
This article presents experimental tests made on a DC to DC Boost Converter of 24 V–48 V. The boost converter was first realized on a laboratory version, regarding it's utility as a voltage source for the E.I.A (Equipments and Installations for Aviation) laboratory of the University of Craiova, and also to be used in teaching activities and for research. During tests it was point out the performances...
As is well known, the airflow speed in a wind tunnel is proportional to the rotation speed of the wind tunnel fan. Thus, the development of an airflow control system to the wind tunnel requires the development of a device able to control the rotation speed of the wind tunnel fan.
This paper presents a comparison between the numerical simulations performed for an electro-hydraulic servo-actuator using two different mathematical models. One follows to show the differences between the results obtained in the two cases, in order to choose the appropriate model if it is necessary to simulate larger systems which contains such servo-actuators. The first of the mathematical models...
The paper presents two fuzzy logic controllers used for electro-hydraulic servo-actuators command. The first is a Mamdani proportional controller with seven membership functions both on input and output and the second is a Sugeno controller also with seven membership functions on input and output. One follows the possibility to obtain good performances for the servo-actuator with each fuzzy controller...
The paper presents a model for a flow controller used in hydraulic power systems. The functioning principle of this flow controller is a combination between a two ways flow controller and a three ways flow controller, widely known in literature. One mathematical model is obtained and numerical simulations are performed in order to put in evidence the qualities of this mechanic-hydraulic scheme.
This paper presents modeling, controller design and simulation study a Solid Oxide Fuel Cell SOFC system. The SOFC mathematical model is used for the fuzzy controller development to improve the system performance. A PD fuzzy logic controller is designed to analyzed the output response of the developed fuel cell can be used in distributed generation applications. Five membership functions are considered...
A PEBB based boost rectifier system is analyzed. This paper presents the modeling and control of boost rectifier. The boost rectifier converts three-phase input voltage to regulated DC link voltage. The average large signal model of boost rectifier is perturbed and linearized around an operating point to obtain the small signal modeling. The performance of boost rectifier is verified through simulation...
In this paper are presented modeling and analysis of the three-phase synchronous generator in closed-loop. The field winding voltage controller is modeled initial as a classical PI controller and then is modeled as a PI fuzzy controller. The performance of the system with fuzzy logic controller is compared with the system having classical controller PI. Simulation is performed on synchronous generator...
The paper presents a fuzzy logic based algorithm to reduce the noise of the miniaturized inertial sensors used in strap-down inertial navigation systems (SDINS) in linear redundant configurations. The algorithm idea is to establish a weight for each sensor from an SDINS axis (measuring acceleration or angular speed) as a function of the standard deviation of the last m samples acquired from it by...
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