<div dir="ltr"><br><div>> <span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">This is the online tool: </span><a href="http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi" target="_blank" style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi</a><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">.</span></div>
<div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif"><br></span></div><div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">damn, it says it cant load it here :P</span></div>
<div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif"><br></span></div><div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">but this seems like a simple formula to try out, from what you copied here. If that's all, and if I got what it means, I can see a patch coming right now :) let's see!</span></div>
<div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif"><br></span></div><div><span style="font-size:12.800000190734863px;font-family:arial,helvetica,sans-serif">thanks</span></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">2013/9/24 Funs Seelen <span dir="ltr"><<a href="mailto:funsseelen@gmail.com" target="_blank">funsseelen@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hi Alexandre,<br><br>This is the online tool: <a href="http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi" target="_blank">http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi</a>.<br>
<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">It starts with an example and every time you refresh the page it gives you a new one. If you scroll down there's a link that tells you how the coefficients were calculated, e.g.:<br>
<h3>2 zeros give 3 coefficients:</h3>
<b>a0</b> = G<br>
<b>a1</b> = -G(Z0 + Z1)<br>
<b>a2</b> = G(Z0*Z1)<br>
<br>
<h3>2 poles give 3 coefficients:</h3>
<b>b0</b> = 1<br>
<b>b1</b> = -(P0 + P1)<br>
<b>b2</b> = (P0*P1)<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">The linear difference equation is derived from these as you can see.<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Regards,<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">--Funs<br></div></div><div class="HOEnZb"><div class="h5">
<div class="gmail_extra">
<br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 7:36 AM, Alexandre Torres Porres <span dir="ltr"><<a href="mailto:porres@gmail.com" target="_blank">porres@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">for what i see, it's not some sort of straight formula, right? seems a bit more complicated than that. <div><br></div><div>cheers</div></div><div><div><div class="gmail_extra">
<br><br><div class="gmail_quote">2013/9/23 Funs Seelen <span dir="ltr"><<a href="mailto:funsseelen@gmail.com" target="_blank">funsseelen@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div>On Mon, Sep 23, 2013 at 5:35 PM, Alexandre Torres Porres <span dir="ltr"><<a href="mailto:porres@gmail.com" target="_blank">porres@gmail.com</a>></span> wrote:<br>
</div><div class="gmail_quote"><div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><br></div></div><div>thanks, here's a pic of what I have so far</div><br><div><a href="https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/11212_10151872996046683_1825736206_n.jpg" target="_blank">https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/11212_10151872996046683_1825736206_n.jpg</a><br>
</div></div></blockquote></div><div><br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">Cool.<br></div> </div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div>
</div><div><div><br></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px">> For extra inspiration you could have a look at PoZeTools</span><br></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px"><br>
</span></div></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px">It sure does look like what I need. Thanks. But extracting what I need to know about the math of converting from coordinates to coefficients was just over my head :P unfortunately, sorry.</span></div>
<div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px"><br></span></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px">I was hoping for something simpler, like just the operations needed. If the info is in code, I need it to more explicit. I'd really appreciate if anyone knows how to read from this and just points it out for me so I can put it in a patch. </span></div>
<div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px"><br></span></div><div><span style="font-family:arial,helvetica,sans-serif;font-size:12.727272033691406px">I'm assuming it's rather simple math</span></div>
</div></blockquote></div><div><br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I remember I once learned how to do this but never repeated the practice. If I find time to do that I would gladly try to figure it out again, but if someone more experienced feels the urge to chime in before that time I would be very happy too :).<br>
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