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MDO: Turning loads on/off automatically during a run?

titansfk1
1-Newbie

MDO: Turning loads on/off automatically during a run?


Hi,



I am trying to setup a simulate (sim) of a piston air compressor using

MDO. I am using a spring load to sim air compression. The problem is

how to turn off the spring force on the down stroke (intake) stroke, and

turn back on for the up stroke (compression) stroke. I tried turning

the force of after 180 deg (in Analysis def. Ext. load From:0 TO: .5), but it doesn't seem to care. I also have a

servo motor with a ramp position to rotate crank from 0-360.



Ultimately I want to add another piston 180 deg out of phase and then

look at the crankshaft torque requirements.





Thanks,



Steve krause

oakland, NJ



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