Projeto e simulação de um controle discreto para a plataforma multi-missão e sua migração para um sistema operacional de tempo real / Design and simulation of a discrete controller for the multi-mission platform and its migration to a real time operational system

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This work uses the concepts of visual modeling, automatic code generation and code migration to real time operational systems. As a study case, a three axis stabilized artificial satellite with fine pointing was used, in its nominal operational mode. The dominance of this kind of technology will make it possible to Brazil, through the National Institute of Space Research (INPE), to acquire the necessary knowledge to conduct new kinds of missons. To do this, the Multi-Mission Platform (PMM) project is now under development at INPE. Blocks diagram modeling and simulation of PMMs nominal operational mode was made respecting three axis stabilization requirements and pointing accuracy of this operational mode. Achieving a satisfactory behavior of PMMs Attitude Control System (ACS) the automatic generation code concept could be used for source code generation representing blocks diagram modeling. ACS and space enviroment code was generated in order to migrate them to a real time operational system and to obtain results for comparison with those obtained by simulation. Time characteristics were added to ACS generated code to make it the real time control software of PMMs nominal operational mode. Four computational environments were used for code migration (ACS and environment code), theirs operational systems were: Windows, Linux, RedHawk and RTEMS. Software migration characteristics were described for each of these four computational environments along with the comparison between migration and simulation of time and logical results. This work made possible to unite concepts of 1) visual modeling, 2) automatic code generation and 3) software migration to real time operational systems, in order to produce equivalent results of those obtained by simulation.

ASSUNTO(S)

controle tempo real instituto nacional de pesquisas espaciais attitude control multi-mission platform simulação sistema operacional space technology and engineering automatic coding real time operator national institute of space research engenharia e tecnologia spacial codificação automâtica plataforma multi-missão system simulation operating system

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