Simulink block to activate wheel brakes only below 200 mph

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Davieslad
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I have a system, setup to simulate the braking of a vehicle.

the vehicle decelerates from 400 mph to zero using a parachute, and conventional brakes

the parachute deploys at 400mph

to prevent the brakes from overheating they need to be used at a lower velocity

at present i have a simulink model which takes into account the parachute, the drag force off the car, and the wheel brakes, all from 400mph.

Simulink block diagram of a vehicle braking model: parachute, car drag and wheel brake force terms sum to deceleration, which integrates to velocity and then distance, with scopes for each.


does anyone know what sort of 'block' would be most appropriate to stop the constant 'wheelbrakes' having any effect until v=200mph?

cheers

ed
 

Discussion

as it turn out, it was! i used the embedded MATLAB function to write a simple if statement...

so simple whaen you know how..