simulink switch (for a single use)

Hi guys I am new with Simulink and igot a problem about switch block.

I want to pass a signal once it reaches a certain value and doesn't matter if it drops or exceeds further.

Let me give an example.

Let say i have two signals 'h' (altitude of an aircraft) and 'v' (speed of that air craft).

Let say i want to pass 'v' signal once my altitude reaches 10000 ft. It doesnt matter if my altitude drops or exceeds 10000ft after i reach 10000ft. Is there any way to do this ?

Answer 1

[Azzi Abdelmalek]

You can use Matlab function block with the code:

y=function(h,v)
persistent m
if isempty(m)
  m=0
end
if h<=1000 & m==0
 y=h
else
 m=2000
 y=v
end

[Brasco , D.]

Thank you very much. This solves my problem.