How can I control the value of a "Parameter Variable" during the simulation?

I need to control a parameter variable during the simulation. For example, when a state variable exceeds 1, the specified "Parameter Variable" is 1. On the other hand, when the state variable is lower than 1, the specified "Parameter Variable" should be 0. Matlab Simulink and Adams Solver solutions are available for that.

0 Henrik.Skovbjerg over 2 years ago

A parameter variable is like a design variable in Adams View. It is always constant during the simulation.

What you describe can be done by using another state variable utilizing an IF function (or multiple STEP functions if transitions should be smooth).

IF function could be done like this:

"IF(VARVAL(other_state_variable)-1 : 0, 0, 1)"
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0 canpolatb20 over 2 years ago

Thank you for your answer.

Actually, I need to change translational stiffness and damping values of a bushing during the simulation.

Other way is to change a parameter variable to disable an existent part but it seems that it is not possible.

Therefore, can't I change these values even with the blocks in Matlab Simulink?
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0 Henrik.Skovbjerg over 2 years ago

A standard bushing can be changed from the acf-file. Have a look at the BUSHING command in the Adams Solver online help. (BUSHING (hexagonmi.com))

If you don't know the time when to change it, you will need to use a SENSOR to detect it.

I personally prefer not to use acf-commands, but rather put the logic into a function in an SFORCE or a GFORCE (BUSHING -> GFORCE. If you try this, you should probably not use IF functions but rather use STEP functions to make the transition smooth.
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