Analysis of WCET in an experimental satellite software development

Authors Jorge Garrido, Daniel Brosnan, Juan A. de la Puente, Alejandro Alonso, Juan Zamorano



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Author Details

Jorge Garrido
Daniel Brosnan
Juan A. de la Puente
Alejandro Alonso
Juan Zamorano

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Jorge Garrido, Daniel Brosnan, Juan A. de la Puente, Alejandro Alonso, and Juan Zamorano. Analysis of WCET in an experimental satellite software development. In 12th International Workshop on Worst-Case Execution Time Analysis. Open Access Series in Informatics (OASIcs), Volume 23, pp. 81-90, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2012) https://doi.org/10.4230/OASIcs.WCET.2012.81

Abstract

This paper describes a case study in WCET analysis of an on-board spacecraft software system. The attitude control system of UPMSat-2, an experimental micro-satellite which is scheduled to be launched in 2013, is used for an experiment on analysing the worst-case execution time of code automatically generated from a Simulink model. In order to properly test the code, a hardware-in-the-loop configuration with a simulation model of the spacecraft environment has been used as a test bench. The code has been analysed with RapiTime, with some modifications to the original instrumentation routines, in order to take into account the particularities of the test configuration. Results from the experiment are described and commented in the paper.

Subject Classification

Keywords
  • Real-time systems
  • embedded systems
  • timing analysis
  • WCET calculation

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