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Open Embedded Control

Författare:
Publiceringsår: 1998
Språk: Engelska
Sidor: 325-343
Publikation/Tidskrift/Serie: Real-Time Systems
Volym: 14
Nummer: 3
Dokumenttyp: Artikel
Förlag: Springer Netherlands

Sammanfattning

Embedded control devices today usually allow parameter changes, and possibly activation of different pre-implemented algorithms. Full reprogramming using the complete source code is not allowed for safety, efficiency, and proprietary reasons. For these reasons, embedded regulators are quite rigid and closed concerning the control structure. In several applications, like industrial robots, there is a need to tailor the low level control to meet specific application demands. In order to meet the efficiency and safety demands, a way of building more generic and open regulators has been developed. The key idea is to use pieces of compiled executable code as functional operators, which in the simplest case may appear as ordinary control parameters. In an object oriented framework, this means that new methods can be added to controller objects after implementation of the basic control, even at run-time. The implementation was carried out in industrially well accepted languages such as C and C++. The dynamic binding at run-time differs from ordinary dynamic linking in that only a subset of the symbols can be used. This subset is defined by the fixed part of the system. The safety demands can therefore still be fulfilled. Encouraged by results from fully implemented test cases, we believe that extensive use of this concept will admit more open, still efficient, embedded systems.

Disputation

Nyckelord

  • Technology and Engineering
  • open systems
  • embedded systems
  • dynamic binding
  • real-time systems

Övriga

Published
Yes
  • ISSN: 0922-6443

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