From: Shane on
Hi Folks,

Can anybody help me I`m trying to derive the transfer function of a hydraulic pump for a college project. I`m using simulink with with the sim hydraulics toolbox. I have built a simple circuit but when I try the linmod command I get a 12th order system, I have also tried the tfestimate command and it plots the transfer function, and I dont know how to change it back to an equation, any help on how to calculate the transfer function of a hydraulic pump or how to change the welch transfer function estmiate plot to an actual equation would be great.

Thanking you in advance
Rgds Shane.
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