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Hydraulic help

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PekkaNF:
Flow restrictor would be most simple method, but if elastic modulus of the material is high, very little volume=time will be on the measurement window....hmmm....what time resolution do you have on the force measurement loop?

I would use proportional pressure regulatin or restricting valve, you don't need great sophistication or accuracy, because you have load cell. Smallest possible valve for the flow (minimal) but you might need additional circuiry to set the rig - or patience and software to trigger from meaningfull load.

Pekka

David Jupp:
Many small hydraulic pumps are (fixed) positive displacement devices, so a flow restrictor won't actually achieve much unless there is somewhere else for the fluid to go.  If the pump is a variable displacement type, some fancier options may well be possible via the built in compensator - but it will depend how the pump is configured.

Operating the pump motor via a VFD may be an option, though performance might well be poor at very low speed.

Will be interesting to see what you end up doing.

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