# about Filtering simulator

**URL:** https://forum.deltamotion.com/t/about-filtering-simulator/284
**Category:** Motion System Design
**Created:** [February 25, 2014, 10:04am UTC](https://forum.deltamotion.com/t/about-filtering-simulator/284 "2014-02-25T10:04:50Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![mars\_bruce\_lee](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/m/a587f6/32.png) [@mars\_bruce\_lee](https://forum.deltamotion.com/u/mars_bruce_lee)
#### Post date: [February 25, 2014, 10:04am UTC](https://forum.deltamotion.com/t/about-filtering-simulator/284/1 "2014-02-25T10:04:50Z")

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There are Several fliter mode in the rmc。  
I want to simulator the filter。  
E.g.  
STEP=5 mode=low pass, Filter=10HZ  
i want the result by simulator. What math soft should i select.  
Like the attachment.  
 ![Filter mode.JPG](https://forum.deltamotion.com/uploads/default/original/1X/2187718bd60e1f48633d6cdd62805d7e54304ff2.jpeg)

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### Author: ![Peter\_Nachtwey](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/p/f17d59/32.png) [@Peter\_Nachtwey](https://forum.deltamotion.com/u/Peter_Nachtwey)
#### Post date: [February 25, 2014, 7:09pm UTC](https://forum.deltamotion.com/t/about-filtering-simulator/284/2 "2014-02-25T19:09:34Z")

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This is basically how we do it. This is a linear simulation.  
[deltamotion.com/peter/Mathcad/Ma … %20ODE.pdf](http://deltamotion.com/peter/Mathcad/Mathcad%20-%20T1C1%20PID2%20simple%20ODE.pdf)  
However, there are practical limitations that you will run into.  
In other words it works well in a simulation but it real life more is required.

This is a much more detailed and hydraulically accurate simulation. Notice that the load increases at 0.8 seconds and we can simulate how the controller will react to the change in load.  
[deltamotion.com/peter/Mathcad/Ma … linder.pdf](http://deltamotion.com/peter/Mathcad/Mathcad%20-%20Hydraulic%20Cylinder.pdf)  
This kind of simulation is much better for sizing pumps, accumulators, valves etc.

There is a lot of good stuff in this directory  
[deltamotion.com/peter/Mathcad/](http://deltamotion.com/peter/Mathcad/)