Use LCNC as dynomometer control ?

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16 Nov 2023 02:05 #285563 by smc.collins
has anyone ever done this ? i'd be interested in the pros/cons versus Codesys or NI labview etc.

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20 Nov 2023 18:17 #286074 by andypugh
I haven't done it, but it ought to work.
I designed dynamometers for a time, and have operated them too.
If the PDP-11s that ran the ones at Ford until 2018 could do it, then LinuxCNC can too.

I would imagine running three (?) parallel PID controllers and switching between them.

The process variables are throttle position (called alpha, for some reason), dyno/engine speed, dyno current (or pressure, or whatever) and dyno torque.

One setup would be a PID controlling engine speed using dyno current. Then you could map alpha to measured torque, or set to 100% alpha and ramp the speed setpoint whilst logging the torque.

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21 Nov 2023 01:46 #286134 by smc.collins
was thinking about it. Looking at Codesys, but for the cost , I can write a halcomponent and use a custom gladevcp interface. I used to own a nice dynomemter, looking to build with Eddycurrent load cells.

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