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Simulations can facilitate the analysis - not directly the synthesis - of control sys-
tems. Nevertheless, simulations can help developers in making judicious design deci-
sions. The purpose of model-based techniques is often to automate simple development
tasks. However, also within model-based development, real design decisions need to be
made by developers and this work can be eased with simulations. In our approach, we
use model-based techniques also for developing the simulation models. We thus aim to
enhance model-based development of control systems by widening the scope of model-
based techniques.
A future working direction of our approach is to shift towards safety functions which
share several similarities with interlocks. It is clear that also development of safety
functions could benefit from simulations; possibly also from the security point of view.
However, the development of safety related systems requires extensive documentation
of design and traceability between design artefacts. This is why we are currently work-
ing with the requirement sub-profile of UML AP. With this work, we not only support
the detailed definition of requirements but also documentation of information origi-
nating from risk and hazard analysis. The rationale is that the requirements of safety
functions are based on these analyses but the information is not always visible for, for
example, the software developers, which makes it difficult to judge the correctness and
completeness of design.
References
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