MATLAB: Can SimHydraulics do full transient analysis and not just quasi-steady state analysis
hydraulicssimSimscape Fluids
I would like to know if SimHydraulics can perform a full transient analysis.
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This bug has been fixed in Release 2007a (R2007a). For previous product releases, read below for any possible workarounds:
SimHydraulics performs transient analysis. You may be able to use the higher-level library blocks, or you may need to build your actuators out of the lower-level library blocks. We ship numerous demonstration models which can be used as a basis for building custom blocks.
A quick overview of the capabilities and limitations of SimHydraulics follows:
SimHydraulics was specifically developed to cover modeling scenarios with hydraulic actuators as part of a control system. It is also appropriate for systems that allow consideration in lumped parameters.
SimHydraulics 1.0 (R2006a+) does not have the capability to model some types of systems:
1. Fluid transportation
2. Water supply and sewer systems
3. Distributed parameters systems
Also, the following assumption is made in SimHydraulics:
SimHydraulics is based on the assumption that fluid temperature remains constant during simulated time interval, and this temperature must be set as a parameter together with the relative amount of entrapped air.
You can model the Water Hammer effect by ensuring there are Fluid Inertia blocks in your model. The simplest way to do this is with theSegmented Pipeline orSegmented Pipeline LP blocks, which can be configured to create a finite-element pipeline model with several inertia elements.
The "LP" means low-pressure, which in turn means that you can also account for pipeline elevation in this block. I'm guessing that for deep-water applications the elevation changes would be non-negligible, so that may be your best bet.
There are also a few examples that show exactly this water hammer effect.
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