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Turcanu D.,Polytechnic University of Bucharest | Nicola I.,Polytechnic University of Bucharest | Prisecaru T.,Polytechnic University of Bucharest | Predoi C.,Polytechnic University of Bucharest | And 2 more authors.
Materiale Plastice | Year: 2015

The paper presents, from a comparative point of view, methods to increase the controllability of a drone. An important step in increasing the controllability is using light weight and resistant materials for the rotating parts of the drone. Also, the controllability can be increased by studying the structure of the propeller in order to reduce its moment of inertia.


Cosereanu L.,Military Equipment And Technology Research Agency | Cristian A.,Military Equipment And Technology Research Agency | Codrea S.,Military Equipment And Technology Research Agency
Applied Mechanics and Materials | Year: 2013

The work paper presents the auto-pilot solution adopted for an unconventional unmanned air vehicle (EADFP - unmanned aerial hybrid baloon-copter system) based on a simplified algorithm implemented on a micro-controller hardware configuration. © (2013) Trans Tech Publications, Switzerland.


Guzulescu N.,Military Equipment and Technology Research Agency | Todirica C.,Military Equipment and Technology Research Agency | Lapadat D.,Military Equipment and Technology Research Agency
Applied Mechanics and Materials | Year: 2014

A distortion aberration free optical system forms an orthoscopic image mean that is similar to original object, undeformed. Naturally imply that most optical systems are designed so that the image distortion is minimal, not to cause inconvenience to the user about either the object appearance - when it comes to a camera or camcorder, or the deformities that may cause measurement errors - when it comes to optical measurement and control equipment. However there are situations when distortion is desired to improve some performances of the observation optical system. In this article we present how distortion is used to increase the field of view, and also how distortion is used to optimize the field of view - resolution compromise. © (2014) Trans Tech Publications, Switzerland.


Turtoi P.,Military Equipment and Technology Research Agency | Turcanu D.E.,Military Equipment and Technology Research Agency | Predoi C.,Military Equipment and Technology Research Agency
Applied Mechanics and Materials | Year: 2014

Image fusion is an intensively used method in applications which require reduction the quantity of information and increase the quality of generated images. This paper presents aspects related to subjective quality assessment for images generated by fusion systems used for observation and surveillance. Subjective assessment is based on the expertise of human operators. © (2014) Trans Tech Publications, Switzerland.


Nicola I.,Polytechnic University of Bucharest | Prisecaru T.,Polytechnic University of Bucharest | Turcanu D.,Polytechnic University of Bucharest | Todirica C.,Military Equipment and Technology Research Agency
Journal of Optoelectronics and Advanced Materials | Year: 2015

In the study of the atmosphere, one main task is not to influence the phenomena. This can be done by using optical methods. One of these optical methods is laser Doppler. One application that can benefit from the advantages of laser Doppler method is to determine the velocity of atmospheric flow around aircrafts. The objective of this paper is to study the influence of a laser Doppler system on the process of velocity measurements and on the measurement precision in order to optimize the system for the use in atmospheric applications. The theoretical aspects were used to simulate the phenomena and the simulations were compared with experimental determination of velocities around and aerodynamic profile using laser Doppler method. The optimization of laser Doppler systems used in atmospheric applications is necessary because if the velocity is more precisely measured than the collected environmental data can be correctly calibrated.


Plesa C.,Military Equipment and Technology Research Agency | Turcanu D.,Military Equipment and Technology Research Agency | Todirica C.,Military Equipment and Technology Research Agency | Nicola I.,Military Equipment and Technology Research Agency
Chalcogenide Letters | Year: 2015

The modern night vision technology uses the advantages of both the image intensifiers technology and infrared sensors technology, namely a clear image, very good resolution, very good target identification probability - for image intensification and ability to see, practically, under any environmental conditions - for infrared sensors. Chalcogenides may represent an alternative for night vision systems objectives because high transmission quality is guaranteed across a wide range of the infrared spectrum images and offer images with nearly similar quality with that given by classical optical glass materials which are operating in the infrared spectrum. The paper presents how the Ge30As13Se32Te25 influences the image quality when it is used as a combination of lenses. © 2015 National Institute R and D of Materials Physics. All rights reserved.

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