Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content BDD: Figure 49: Total system (source to sink) blocks, ports, & component properties Source SysPhS-1.1 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind INFO UML keywords Port SysML keywords Real Unit ValueType::unit ValueType Keywords SysPhS signal processing Previous snippet In this example, ports are typed by RealSignalOutElement and RealSignalInElement from the signal flow library ... which both have a flow property rSig typed by Real, from SysML, as shown in Figure 49. Full quote This value type has no unit, reflecting that the signals are not measurements of physical quantities and do not follow conservation laws. Next snippet Related snippets A.3.2 System being modeled The signal processor and its testbed have a wave generator, an amplifier, high-pass and low-pass frequency filters, a mixer, and a signal sink, see Figure 46. Figure 47 and Figure 48 show the internal structure of blocks TestBed and SignalProcessor, respectively Part properties, typed by blocks ... represent the components of the system. They are connected through ports .. which represent signal outputs and inputs ... Signals pass through ports in the direction shown by the arrows. Item flows on connectors indicate that the signals are real numbers. Figure 47 connects a signal source to a signal processor, which it connects to a signal sink that displays the output. Figure 48 connects the signal processor input to an amplifier, the output of the amplifier to a high-pass filter in parallel with a low-pass filter, the outputs of the filters to a mixer, and the output of the mixer to the signal processor output. SysML initial values specify property values for components used in internal block diagrams. SysML initial values specify property values for components used in internal block diagrams. Figure 49-Figure 50 show block definitions for components of TestBed and SignalProcessor in Figure 47 and Figure 48, respectively. The output for SignalSource is named y and is typed by RealSignalOutElement, from the signal flow library ... The input for SignalSink is named u and is typed by RealSignalInElement, also from the library. The signal processor has an input and output, transforming the signal from the source and passing it to the sink. Mixers have inputs u1 and u2, and an output y. Each kind of component has its own behaviors, defined as constraints ... Signal flow is the movement of numbers between system components. These numbers might reflect physical quantities or not. In this example, they do not ... Signals flowing in and out of components are modeled by ports typed by interface blocks that have flow properties typed by numbers. In this example, ports are typed by RealSignalOutElement and RealSignalInElement from the signal flow library ... which both have a flow property rSig typed by Real, from SysML, as shown in Figure 49. Related snippets (backlinks) Visit also Visit also (backlinks) Flags
