Loading a Simhydraulic Motor

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Andrew
Andrew 2012-6-8
I'm working on a system where I will want to put a load onto a hydraulic motor so that the system will develop pressure. In the SImHydraulics package there appear to be two hydraulic motors, "Hydraulic Motor" and "Variable Displacement Motor". Both of these include under their assumptions "No loading on the motor shaft, such as inertia, friction, spring, and so on, is considered." This would seem to indicate that it is not possible to load a hydraulic motor, which doesn't really make sense. Am I misunderstanding this statement or is it not at all possible to load one of these motors?
If I wanted to create back pressure using a hydraulic motor is there another approach I should take?
Thank you, -Andrew

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Guy Rouleau
Guy Rouleau 2012-6-8
The doc statement means that the Hydraulic motor itself does not include loads such mass spring and damping.
This means that you need to use blocks from the Mechanical section of the Simscape foundation to apply load, for example Torque Actuator, Rotational Spring, Inertia, etc...
See demos like "sh_hydraulic_transmission_secondary_control.mdl" or "sh_actuation_system_cartridge_valve.mdl" for example.

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