I am using Matlab's simhydraulics to design a closed loop hydraulic circuit using a variable displacement pump and a gas charged accumulator to drive a rotary actuator. I need some help with the calculations. Can anyone recommend me a source where I can find some similar circuits for example. I also want the theory (equations used for sizing and other things) for the three components.

Are you trying to model existing components or are you designing each component from scratch?

Is your goal to develop controls or just qualify the ability to complete a task?

What is the application?

Are you planning on having the pump supplementing the accumulator during actuation or will there be valve control?

Torque output will be pressure dependant. The accumulator volume, pre charge pressure and operating temperature will affect the pressure and volume available from the accumulator. The cycling of the accumulator can affect the gas temperature which will affect the pressure to the actuator.

You may not be able to use the SimHydraulics accumulator model because of variations in operating temperatures or the cycling constraints.

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