نتایج جستجو برای: Formation flight problem

تعداد نتایج: 1427401  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

This paper presents a tuned behavior-based guidance algorithm for formation flight of quadrotors. The behavior-based approach provides the basis for the simultaneous realization of different behaviors such as leader following and obstacle avoidance for a group of agents; in our case they are quadcopters. In this paper optimization techniques are utilized to tune the parameters of a behavior-bas...

M. A. Dehghani1 M. Azimi M. B Menhaj,

This paper deals with the leader-follower formation control problem while communication constraint in data transmitting is considered. From a practical point of view, we study the case in which unmanned vehicles are subject to the limited sensing, and communication is of a particular interest. A three-dimensional formation flight of multi-unmanned aerial vehicles with leader-follower configurat...

Journal: :علوم و فناوری فضایی 0
r zardashti m bagherian

in this paper a new guidance technique for ballistic missiles and launch vehicles is proposed. generally the lambert guidance is used to generate missile nominal (correlated) parameters through powered flight to put it in a ballistic flight path. because of uncertainties and undesired factors, the nominal position and velocity obtained by lambert technique need to be followed in actual flight. ...

2008
Hyo-Sang Shin Tae-Hun Kim Tae-Won Hwang

Many formation guidance laws have been proposed for UAV formation flight. Since most autonomous formation flight methods require various active communication links between the vehicles to know motion information of other vehicles, damage to the receiver or the transmitter and communication delay are critical problem to achieve a given formation flight mission. Therefore, in this point of view, ...

In this paper, an approximate solution of sensitivity matrix of required velocity with final velocity constraint is derived using a piecewise linear gravity assumption. The total flight time is also fixed for the problem. Simulation results show the accuracy of the method. Increasing the midway points for linearization, increases the accuracy of the solution, which this, in turn, depends on the...

2017
Linghang Meng Yifei Zhao Xiaohao Xu Zengxian Geng

The continued increasing air traffic demand and the corresponding fuel consumption urge the innovations of technologies and operating modes in commercial aviation community. Formation flight, due to its potential for reducing fuel use, are widely recognized as one of the most effective ways to improve aviation fuel saving. This study addresses the commercial formation coalition problem under in...

Journal: :International Journal of Aerospace Engineering 2011

Journal: :Transportation Planning and Technology 2004

ژورنال: طب کار 2011
صادق نیت حقیقی, خسرو, یزدی, زهره,

Abstract Introduction:Excessive daytime sleepiness and other sleep disorders are receiving much attention as a cause of work accidents. Sleep disorders can disturb sleep and waking alertness. While the pilots and other flight crews suffer from sleep disorders, they will be unable to monitor airplane systems. This will reduce the safety of the flight. The aim of this study is assessment and ana...

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