Flow rate vs pressure relationship in a hydraulic cylinder

AI Thread Summary
The relationship between flow rate and pressure in a hydraulic cylinder is primarily influenced by the load on the rod, which determines the pressure. Flow rate dictates the piston movement speed and remains largely independent of pressure, provided the system's pipes are adequately sized to prevent flow obstruction. Understanding this dynamic is crucial for accurate modeling in Simulink. Proper control strategies should consider these factors to optimize hydraulic system performance. Ultimately, the design and load conditions play a significant role in the flow rate and pressure relationship.
serbring
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Hi all,

I need to model an hydraulic cylinder with simulink and to control it according to some rules. What I don't understand is to find a relationship between the flow rate and pressure inside it. Any suggestion is appreciated.

Thanks
 
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A hydraulic system is designed so the pipes are large enough to not obstruct the flow. The pressure in the cylinder will be determined by the load connected to the rod.

The flow rate sets the rate of movement of the piston. It is independent of the pressure, except for the external mechanical components connected to the rod.
 

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