Block Authoring

Create custom queues and servers using discrete-event system objects

SimEvents^® library provides ready-to-use common design patterns that you can incorporate into your model. These patterns include models for random entity generation, random service time, and custom behavior for the Entity Gate block, the Discrete-Event Chart block, and the MATLAB Discrete-Event System block. For more information, see SimEvents Common Design Patterns.

If the provided patterns are not sufficient for your design, you can use MATLAB Discrete-Event System block which extends System objects to create custom SimEvents blocks in your model. This capability is useful for including algorithms. The Discrete-Event Chart block uses Stateflow^® charts and messages to create custom blocks in your model. This capability is useful for creating application-oriented blocks and add-on software. Examples of such software are real-time operating system schedules and communication networks. The block requires a Stateflow license. For information about block authoring and simulation integration in Simulink^®, see Block and Blockset Authoring.

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Featured Examples

Flush Entities from a Queue-Server

Use a Discrete-Event Chart block to model a queue-server that can flush entities when it receives a message on the "FlushCmd" port.

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Server with Pause/Continue

Use a MATLAB Discrete Event System block to model a single server that can pause service. The input port IN receives entities to be served. Additionally, the system may receive sporadic pause commands on port PauseCmd. If the message received on the PauseCmd port carries data=1, the system pauses. The system reschedules service for the current entity when it receives a continue message on this port, i.e. a message that carries data=0.

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Selection Server - Select Specific Entities from Server

Use the MATLAB Discrete Event System block to write a custom N-Server from which specific entities can be selected using a key lookup. Passengers enter from the IN port of the block and are stored in the block until a message arrives at the KEY port carrying a lookup key. Upon receiving this message, the system schedules an "Iterate" event during which it can visit every entity stored in it and output the one that matches the key.

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Simulation of a Medical Device

Conduct automated tests to model a medical device that analyzes biology samples.

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