On 05-Sep-18 8:27, Keith Packard wrote:
Stewart Campbell <[email protected]> writes:
Hi,
I am using the extra four inputs on the TeleMega to provide logging
of my servo PWM commands on my Vertical Trajectory System. I was
wondering what filtering you have on those inputs and what the logging
rate is please?
It sounds like you're just using the extra pyro channels as inputs? Not
exactly what we designed it to do; but I can't see why it wouldn't work?
It works a treat. For the Vertical Trajectory System I feed the four
servo analog signals in. I can then compare that with the gyro values
etc from the TeleMega in real time on the graphs. When not flying the
VTS I couple the batteries from the other altimeters into the TeleMega
so I know what those supplies are like before launch.
I see there is no capacitor for filtering the input, just a voltage
divider, so I assume you are using an IIR filter (or Kalman?) of some
sort since the logging trace is quite clean :-)
No filtering at all. We log the raw data.
Great. Just how I like it!
. I am trying to figure
out if I should be able to see signals in the region of 2.5Hz (give or
take) or perhaps a little faster, or be able to estimate any attenuation
or phase shift I might be seeing.
Well, we sample at 100Hz, but only log once ever 32 samples. If you want
to hack up the firmware, you can get it to log at 100Hz quite easily.
Sounds like I need to set up a compile system :-)
_______________________________________________
altusmetrum mailing list
[email protected]
http://lists.gag.com/mailman/listinfo/altusmetrum
