The Concept Of Data Model

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Along with the system design, detailed numerical models (e.g. control models, mathematical models, data constraints) can be added into the analytical framework to decrease the uncertainty of simulation results. In this process, the qualitative models should be validated to ensure consistency with numerical models. During this process, the expressions of propositional logics and linear temporal logics are replaced by High Order Logics. An example of numerical model implementation is demonstrated in Fig 5; after specifying plant power, a form of proportional-integral-derivative (PID) control can be implemented and assigned to the software “Control Routine”. Note that the meaning and actual values of each parameter are gathered from the…show more content…
Faults should be classified by their cause, occurrence, propagation, and impact on functions. Table 2 includes the attributes considered for defining the necessary ontologies. Table 2 Ontologies defined for knowledge collection Component Ontology Functional Ontology Flow Ontology Fault Ontology • Static or dynamics properties; • Subcomponents; • Input/output flows; • States (Nominal, Faulty); • Behaviors in each state; • The achieved functions; • Severity of failures; • Sub-functions; • Inputs/outputs flows; • States (Operating, Degraded, Failed); • Realizing corresponding customer requirements; • Physical Variables, Latency, Carrier; • Objects to be delivered, such as material, signal; • States (Delayed or Blocked); • Behaviors in each state; • Origin, Occurrence, Time/Phase of Introduction and Discovery; • Involved components or flows; • States (Dormant, Activated, Terminated); • The functional failures impacted by the current fault; The use of ontologies can allow us to account for dependencies and relationships among components that would otherwise not be considered. Collecting supplemental information based on such ontologies requires several steps, including 1) Knowledge determination. This step recognizes the information to be acquired from external sources and determines the format (templates used) to record that information. For example, based on the component model created from a
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