Abstraction and Interfaces

goodinterfacedesignisthekeytodrawingblockdiagrams

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Unformatted text preview: ere: Sensor Computer Actuator Building thermostat Automobile cruise control R/C helicopter heading lock [switch to white board] 9 Interface The interface to a component is a specification describing what goes in and what comes out • It does not specify what happens inside (it’s abstract, remember?) Good interface design is the key to drawing block diagrams • It can take several tries to get it right What can go in and out? • Power, information, data, motion, force, water, electricity… electrical energy energy storage: battery mechanical energy energy conversion: motor mechanical energy energy transmission: gears physical force: rotor blade 10 Interface Consider our thermostat example • What are the most abstract way to represent what is on...
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