Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Figure 11-10: Continuous system example 1 {ELIDED PINS} Figure 11-10: Continuous system example 1 {EXPLICIT PINS} Source OMG Systems Modeling Language (SysML) 1.6 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind INFO SysML keywords SysML specification figure Continuous «continuous» Previous snippet Full quote Figure 11-10 shows a simplified model of driving and braking in a car that has an automatic braking system. Next snippet Turning the key on has a duration constraint specifying that this action lasts no more than 0.1 seconds. Related snippets Related snippets (backlinks) Turning the key on has a duration constraint specifying that this action lasts no more than 0.1 seconds. Turning the key on starts two behaviors, Driving and Braking. These behaviors execute until the key is turned off, using streaming parameters to communicate with other behaviors. The Driving behavior outputs a brake pressure continuously to the Braking behavior while both are executing, as indicated by the «continuous» rate and streaming properties (streaming is a characteristic of UML behavior parameters that supports ... Brake pressure information also flows to a control operator that outputs a control value to enable or disable the Monitor Traction behavior. No pins are used on Monitor Traction, so once it is enabled, the continuously arriving enable control values from the control operator have no effect, per UML semantics. When the brake pressure goes to zero, disable control values are emitted from the control operator. The first one disables the monitor, and the rest have no effect. While the monitor is enabled, it outputs a modulation frequency for applying the brakes as determined by the ABS system. The rake notations on the control operator and Monitor Traction indicate they are further defined by activities, as shown in Figure 11-11 and Figure 11-12. An alternative notation for this activity decomposition is shown in Figure 11-13. Visit also Visit also (backlinks) Flags
