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Sources and Sinks


There are three kinds of external connections and devices in an ACS:

Most source and sink components in an ACS must be designed and constructed independently from the models and transformations that interact with them. This is because, in general, there is a many-to-many relationship between devices and other components:

Design Steps

Separate device control from information flow by constructing Device Controllers. Sensor device controllers differ in most details from Effector device controllers. The control of inputs and outputs is generally device-specific, while the overall ACS Information Flow is generally estimate-specific. User interfaces and instruments are special kinds of input sensors and output effectors. (The design of user interfaces for avionics systems is not otherwise addressed in this set of patterns.)

Doug Lea
Tue Mar 28 08:50:41 EST 1995