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implement a discrete-event system object™ using matlab discrete-event system block

you can extend the existing functionality of simevents^® by authoring new blocks to model behaviors that are not provided with a simevents built-in solution. to create custom functionality in simevents models, you can use the matlab discrete-event system block that allows you to implement a discrete-event system object written in matlab^® language.

to implement a custom discrete-event system object, inherit class. link the system object to a simevents model by using a block. the linked matlab discrete-event system block exhibits the desired custom behavior during simulation.

blocks

matlab discrete-event system

classes

base class for discrete-event system objects

methods

events

	create a resource acquisition event
	create entity destroy event
	create entity forward event
	create entity generate event
	create entity iterate event
	create an event to release previously acquired resources
	create an event to release all resources acquired by an entity
	create an event to indicate that the acceptance policy for the storage has changed and the storage retests arriving entities
	create entity timer event
	initialize event array
	initialize a resource specification array

event actions

	event action when entity forward fails
	event action upon entity destruction
	event action when entity enters storage element
	event action before entity exit from storage
	event action upon entity creation
	event action when entity iterates
	event action upon entity modification by the entity find block
	event action upon successful resource acquisition
	event action upon successful resource release
	event action to accept or refuse entity
	event action when timer completes

cancelling events

	cancel previously scheduled resource acquisition event
	cancel previously scheduled entity destroy event
	cancel previously scheduled forward events
	cancel previously scheduled entity generation event
	cancel previously scheduled iterate event
	cancel previously scheduled timer event

storage, entity, and resource specification

	define entity type
	define input ports and output ports of discrete-event system
	define entity storage elements of discrete-event system
	define entity types of discrete-event system
	define resource pools from which to acquire resources
	define first-in first-out (fifo) queue storage
	define last-in last-out (lifo) stack storage
	define priority queue storage
	define system priority queue storage
	create specifications for a resource acquisition or a resource release event
	specify an entity type and the name of the resources to be acquired by the specified entity
	initialize entity generation events

topics

the simevents library provides design patterns that you can refer to while modeling.
author discrete-event system object by defining entity types, ports, storage, and events.
- step 1:
- step 2:
- step 3:
- step 4:
- step 5: build a custom block with multiple storages
- step 6:
use the matlab.discreteeventsystem class to implement a discrete-event system object.
configure matlab discrete-event system block.
define and work with events in custom discrete-event systems.
call simulink^® function from a matlab discrete-event system block.
this example shows how to model resource scheduling using data exchange between the matlab discrete-event system block and the data store memory block.