Yes that could be a problem in a controller.

Since this is a monitoring project it doesn't matter.

Good point!

Andy










Spehro Pefhany <speff@INTERLOG.COM> on 05/11/2000 02:07:29 PM

Please respond to pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>








 To:      PICLIST@MITVMA.MIT.EDU

 cc:      (bcc: Andrew Kunz/TDI_NOTES)



 Subject: Re: Square root (was: Pressure to MPH) [OT]








At 08:50 AM 5/11/00 -0700, you wrote:
>
>Andy can avoid the square root if he doesn't have to display airspeed. Just
>square the target speed and do the speed loop comparisons using the squared
>numbers.

Careful with this one, it results in nonlinear controller gain, which can
affect control stability if there is much range in the setpoint.

Best regards,
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=