.BondLib.Sources.expSf

Information

The step response flow source is an active OnePort element. It inherits the effort and flow variables from the active OnePort. The step response flow to be generated is modeled as a set of six parameters.

The flow source has its causality stroke at the source.


Potential variables:

 e:              Bondgraphic effort variable

 f:              Bondgraphic flow variable, normalized positive for flows out of the model


Parameters:

 f0:             Height of step response after infinite time (default value = 1)

 riseTime:       Rise time of step response to be generated (default value = 0.5)

 riseTimeConst:  Rise time constant of step response to be generated (default value = 0.1)

 fallTimeConst:  Fall time constant of step response to be generated (default value = riseTimeConst)

 offset:         Offset of step response to be generated (default value = 0)

 startTime:      Start time of step response to be generated (default value = 0)


Equations:

f_riseTime = f0*(1 - exp(-riseTime/riseTimeConst))
f = offset + (if (time < startTime) then 0 else if (time < (startTime + riseTime)) then f0*(1 - exp(-(time - startTime)/riseTimeConst)) else f_riseTime*exp(-(time - startTime - riseTime)/fallTimeConst));


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