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| Headspeed drops when changing flight modes with governor https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=1545 |
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| Author: | thestructured [ Mon 18. Jul 2016 8:02:23 ] |
| Post subject: | Headspeed drops when changing flight modes with governor |
I've been having some issues getting the governor to work well on my nitro. Some of the problems were not related to the spirit. First, my backplate sensor needed to be positioned at just the right distance, which I think I finally got right. And of course tuning comes into play as well. But two things that are happening are not related to tuning issues or sensor (as far as I know). 1) when switching between IU1 and IU2, the headspeed drastically drops and then climbs back to where it should be. It's almost as if it's soft starting from idle every time I switch headspeeds instead of just smoothly lowering or raising it. It's fine once I give it a few seconds to lock into the desired headspeed. 2) Often times when I switch between IU1 and IU2 nothing happens. The headspeed does not change at all. At first I thought maybe it was due to the sensor not giving a reading and the heli defaulting to my flat throttle curves, but that's not the case. Though the headspeed doesn't change, the governor keeps working and holding the current headspeed through maneuvers and flight. My curves are set so that if the sensor fails the throttle is only around 62%, so it's very obvious when the sensor isn't reading so I know that's not what's happening. 3) Also unrelated, my DSMX satellites are positioned about as well as they can possibly be with the active antennas completely off of any carbon fiber. On my first flight today, though I did not notice anything strange in flight, my log said it lost signal twice at the very end, with a low voltage warning. This was with a fresh off the charger RX pack that is very new. I did not appear to have any signal loss or related issues for the rest of the day, so it's possible that this was logged when I put my transmitter on the ground when I went to get my heli at the end of the flight. |
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| Author: | ZeXx86 [ Mon 18. Jul 2016 20:38:20 ] |
| Post subject: | Re: Headspeed drops when changing flight modes with governor |
Hello, great it is getting better. 1) Please verify if you can see Requested RPM with IU1. It look like TC is under 50% - if this is the case, then governor will be activated when IU2 is on. So this case cause what you have described. If Requested RPM is 0, then it mean governor will be Off 2) You can try to increase RPM sensor filter (in the Expert Settings window). If RPM readout is not very stable, governor can think it already reached requested RPM when switching TC, so then it will do nothing. Making it more stable should solve the issue. Yes, sensor distance is very important, especially for your sensor type. 3) If transmitter is turned off when the unit is still running, it will record it as a signal loss. Then when also battery is disconnected, you will see low voltage event. This is because unit cant know, if it was desired or not. So it is recorded to not loose any valuable information. If transmitter was on all the time, then the signal was really lost (at least few frames). It may be not visible, but it is not good. Maybe transmitter/signal path was covered by something. |
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| Author: | thestructured [ Mon 18. Jul 2016 21:11:46 ] |
| Post subject: | Re: Headspeed drops when changing flight modes with governor |
Thanks for the response. I have always checked the sensor is giving readings when spinning the motor with the starter. IU1 and IU2 are 62% and 67% so the governor should not be disengaging. Usually, it will end up at the correct headspeed, but only after it drastically drops and then creeps back up to speed which is strange. When it finally locks into a headspeed, there is no problem holding it constant so it seems the sensor readings are working. I will try increasing the rpm filter. I'm also curious on how autorotation bailout would work on nitro? I know that the throttle needs to read 12% in the unit and setting the throttle servo accordingly wouldn't be hard, but how would you set the spool up speed for bailout? Or does it go by the normal spool up speed that you set? Or does this only work with electric helicopters? |
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| Author: | ZeXx86 [ Fri 22. Jul 2016 8:07:54 ] |
| Post subject: | Re: Headspeed drops when changing flight modes with governor |
Great. Spoolup speed is configured automatically depending on rest of the configuration so that it should be good for your model, yet fast enough. It works with any helicopter - your TC just shouldn't drop under certain value (less than 12%). In this case spoolup will be much faster than the first time. |
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