TECS log file entries explained

[chris-s]

Is there a guide or can anybody provide a definition for the TECS data flash log items?

I’ve taken a guess on some of them…

h - actual altitude
dh - actual rate of altitude change
h_dem - altitude demanded
dh_dem - demanded rate of altitude change
sp_dem - airspeed demanded
sp - actual airspeed
dsp - actual change in speed
ith - something to do with throttle, rate of change?
iph - pitch related?
th - actual throttle output
ph - something to do with pitch?
dsp_dem - change in speed demanded

Chris

[chris-s]

OK, so sort of answering a bit more of this for myself after looking thru the source…

h Integrator state 3 - actual altitude

dh Integrator state 2 - actual change rate in altitude

h_dem Altitude demanded

dh_dem Altitude change rate demanded

sp_dem Speed demand after application of rate limiting, tracked by the TECS control loops.

sp Integrator state 5 - actual airspeed

dsp Rate of change of speed along X axis

ith Integrator state 6 - throttle integrator

iph Integrator state 7 - pitch integrator

th throttle demand in the range from 0.0 to 1.0

ph pitch angle demand in radians

dsp_dem Speed rate demand after application of rate limiting, tracked by the TECS control loops. I think this is the demanded acceleration/de-acceleration?

… just not clear on what ‘throttle integrator’ and ‘pitch integrator’ actually represent?

Chris