Lucian-Florentin Barbulescu

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The near-Earth space surveillance requires accurate and fast orbit predictions for the multitude of objects that are present around our planet. This prediction is performed by means of orbit propagators which offer solutions to the satellite equations of motion. Based on the method of computation those propagators are split into three categories:(More)
The Hansen coefficients are widely used in the semi-analytical methods of elliptic orbital propagation. The generation of those coefficients, in computer software, was usually performed by means of recursion formulas, but this approach has some time penalties mainly if not all values are required. We developed a linear approach, which uses polynomials, and(More)
The evolution of computer hardware and computer networks led to the evolution of the distributed software simulators which consist of several independent modules, with a light architecture, that communicate with each other in order to fulfill their required function. One such system, that can be used to create simulators for industrial installations,(More)
This paper presents an adaptive flight control system for a launch vehicle. The rocket has an in-line configuration with each stage on top to another and the payload placed atop the rocket. The driving is achieved through the reactive rocket engine gimbaled nozzle, by changing the orientation of the thrust force. Rocket rotation around roll axis is done(More)
DstriSimJ is framework, written in Java, which allows the user to build modular simulators and to deploy them on multiple machines in order to take advantage of their cumulated computation power. The framework is focused mainly on the functional part of the simulation and it offers only a limited support for building graphical user interfaces which have no(More)
The Hansen coefficients are one of the most important tools in the analytical or semi-analytical methods of celestial mechanics. The problem of efficient computation was investigated in detail in many papers, but this subject is still open and to date there are not standard algorithms to generate the Hansen coefficients with accuracy and good computation(More)
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