SIMULINK How to connect gas charge accumulator to a pump/motor?
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greeneapps
on 23 Mar 2015
Edited: Sebastian Castro
on 24 Mar 2015
How can I simulate a reversible pump/motor that draws fluid from a gas charged accumulator and dispenses the fluid to a reservoir afterwards, and for the reverse so the pump uses a source of torque to draw fluid from the reservoir through the pump to the gas charged accumulator?
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Sebastian Castro
on 23 Mar 2015
SimHydraulics comes with blocks for all of those already: Pumps, gas-charged accumulator, tanks, valves, etc. A typical diagram could look as follows:
The real challenge is getting all the parameters right :)
- Sebastian
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Sebastian Castro
on 24 Mar 2015
Edited: Sebastian Castro
on 24 Mar 2015
Yeah, this is common when you have hydraulic components. The zero-crossings fired deal with rapid "mode switching" -- for example, if your accumulator is constantly switching between charging and discharging.
I like this blog's explanation of how you can deal with zero-crossings: http://blogs.mathworks.com/seth/2013/04/26/zero-crossing-detection-what-are-your-options/
Another approach which is particular to using Simscape/SimHydraulics/etc. is the use of the Local Solver , which prevents these small time-steps at the cost of (some) accuracy. You typically want to run your model with all those zero-crossings, and then enable local solver to see if your speed increases without sacrificing accuracy.
- Sebastian
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