MATLAB SIMEVENTS RELEASE NOTES Guía de usuario descargar pdf (Pagina 57)

Build a Hybrid Model

2-35

Sensor Relative Slip Subsystem

The Sensor Relative Slip subsystem contains a Gain block where you can specify the

accuracy of the sensor in converting the actual relative slip to a measured value that

feeds back to the controller. A gain value of 1 simulates the ideal case of a sensor that

measures the slip with 100% accuracy.

Lesson 3: Add Event-Based Behavior

In this lesson, you’ll create the hybrid model by adding blocks from the SimEvents

library to the model introduced in “Lesson 1: Run the Time-Based Model” on page

2-30. To simplify the top-level view of the model, the SimEvents blocks are placed in

a subsystem. This subsystem models a communication delay between the ABS controller

and the braking system. The communication delay is a simple representation of the

delay effect that distributed components might experience when they communicate over

a heavily-loaded in-vehicle network. Each SimEvents entity in the delay subsystem

represents a data packet that conveys control signal information between the controller

and the braking system.

Top-Level View of Completed Hybrid Model

The completed model will look as shown in the preceding graphic. Both the ABS

Controller and Brake System Dynamics blocks are time-based systems. The Network

Delay subsystem block is an event-based system. In SimEvents, when signals transition

between the time-based domain and the event-based domain, or vice-versa, the blocks in

the Gateways block library manage this signal conversion.

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MATLAB SIMEVENTS RELEASE NOTES Guía de usuario Pagina 57