New VBar "Ultra" Software

[Team-MAYHEM]

Download it here...

http://vstabi.de/download/setup3.6.16.exe

Ultra gives you improvements in:

- hovering
- more "crisp" cyclic
- less oscillations on cyclic during FFF

Gain on the main rotor can now be increased to 500 and AOF filters can be increased to compansate. I installed this and changed a few of the parameters on my heli...and...WOW! This thing flies like a dream no more dolphin effect when it's haulin ass, just smooth raw power.

Try it!

[fireup]

Cool :thumbup:. will try it out on my T500 this weekend and see if there's any improvements.

I translated the wiki from German to English using Babelfish and came out pretty good... except it don't know what "Kopfdämpung" mean:confused:



Introduction
In run the time was it shown, which gives it nevertheless a certain dependence of the flight characteristics of the sheets. Particularly with high-speed flies it shows up whether a sheet lies calmly in air, or to pumping bends. The cause for the different behavior is the structure of the sheet. Depending upon geometry and situation of the emphasis different agilities of the sheet result. That is nothing else as an inserted reinforcement of the instructions given by swash plate.

If one uses now sheets with a aggresiven tax behavior, one gets an additional reinforcement into the automatic control loop. One begenet with somewhat less reinforcement in the automatic controller.

The main work in the automatic control loop was taken over with the classical attitudes of the Hiller portion, what corresponds in principle to the mechanical model. The Hiller portion regulates relatively slowly, but however effectively. In the high-speed flight it can come by the Hiller portion to automatic controller rockers, which becomes apparent by pumps.

Ultra is different
The Ultra mode goes another way, which actually corresponds to more control engineering, by regarding the P portion as main controlled variable. The Hiller portion is then only responsible for slow Korrekturvorgägnge. The relationship is thus radically shifted.

In order to make possible, adjustments are necessary in the ranges of values. The parameters are not already longer available, like that a change in the firmware are necessary. Here the flexibility of the open concept shows up completely clearly.




Substantial components of the Ultra mode are
the main automatic controller (now P led)
the AOF filter, which makes extremely high P of portions at all possible
a limiter in the tax speed, which prevented that is destroyed the heli coil by tax movements.A careful attitude of the AOF is particularly important, in order to suppress a P oscillation. The attitude is dependent actually also of the adjusted P reinforcement. The AOF depth should be always somewhat less, than the half P portion.

An active oscillation suppression can function only correctly, if the position elements (Servos) are clearly faster, as the oscillation which can be suppressed. With larger Helis that is actually no problem, because the frequency of oscillation quite slow, is. With smaller Helis it becomes more critical, because dei Servos can keep up hardly still with the high frequency. Here one can arrange the Kopfdämpung somewhat softer, in order to lower so the natural frequency.

The result
In the result the Ultra mode offers actually only advantages. The only critical criterion is to be selected it the P portion in such a way, which still no P oscillations arise. In the basic adjustment fits completely well for most Helis of logo 400 up to 90's verb racers.




The following effects disappear thereby, or are strongly reduced:
Wobbeln in TIC Tocs
Rear up in roles
Jacks (pump) in the high-speed flight
Delfin effect when pitch giving in the high-speed flight
Eggs in Piruetten
Unrest when floating particularly with windActivate
Activating the Ultra mode effected exactly the same as the change-over of classical period on extends. There is entsprehcneden button, clicks, feritg! Only if the Setup should not fit, one needs to use the above hints and explanations.

The Ultra mode normally does not possess the characteristic (exactly as extended), a wrong trim “hides”, one notices it thus. Nevertheless it is to be particularly flown for clean Piruetten very importantly the trimtrim trim. Therefore a trim flight should nevertheless always take place in classical period the mode before one on Ultra scolded.

If the heli coil flies to classical period or if mode extends so far normally, one can go safely on Ultra.

[dahld]

Based on the context of the sentence, it probably means "head dampening". Just a guess.

[Panda]

Yes, you are right! 'Kopfdämpfung' is "head dampening!"!

[fireup]

Ok, the real translation is up. I try to update but it said that this current version software is not compatible with my vstabi.:confused:


Introduction

During testing and flying with VBar it turned out, that there is some depeny between blades and flight performance. Mainly in FFF blades make a big difference, some are very stable, others tend to fly in waves. This is mainly because of different aerodynamical gains aof the blades. Blades that are made to be agile do have more gain than bladse that are desiged for smooth flying.
Normally this is compensated by adjusting the gain settings of the control loop.
In the traditional setup method the main gain of the loop is maintained by the hiller amount (Integrator). Hiller does react slowly but permanently. If the hiller gain is too high, the control loop begins to oszillate slowly (about 1/sec).

Ultra is different

The Ultra mode does it on a different path, which is more the control theory than its mechanical counterpart. It uses the proportional gain as main parameter. Hiller gain is now for some slow long term corrections only. The parameters are radically different.
To enable this, some limits have to be changed to maintain enough proportional gain. The parameters are already there since long time so a change in firmware is not needed (Base 3.6 PL 16). This shows the power of an open concept where parameters are accessible and not hidden.



The main components of the Ultra mode are:
main controller (now mainly proportional)
the AOF, which enables extreme high proportional settings
a limiter, thats avoids destroying the heli with stick commandsIts very important to set up the AOF correctly, to supress proportional oszillations. This type of oszillation tends to be faster, about 5/sec or more. As a rule of thumb, the AOF gain shall be less than half of the proportional gain value.
An active anti oszillation system only can work, if the actuators are faster than the oszillation that is to be supressed. This is no problem on bigger helis, but can be difficult on smaller ones. To shift down the self oszillation frequency, it is useful to make the head dampening a bit softer.

The Result




There are a lot advantages to the Ultra mode. The only limitation is the maximal maintainable proportional gain value. The basic settings are designed to fit helis starting from logo 400 size up to .90 size ic helis. The followig effects are supressed or at least improoved:
tic toc wobble
balloning effect in rolls
slow oszillations if FFF
delfin effect
wobbeling in piruettes
instability at hover on external influencesActivation

Its the same like switching from classic to extended, Click the Ultra button. Thats all. The above may be helpful if you get problems with these settings. The Ultra mode hides an off spot trim settings, same as the extended mode. But its important to have a good trim, at least to get leveled piruettes. To maintain this, do a trim flight to check and correct the trim settings before switching to ultra. Trim flights have to be done in classic mode. If the Heli is set up in the classic or extended mode, its save to switch to ultra.

[Eyon]

going to try it out today. i have DJ's latest setup, should fly really well i hope

[rscamp]

Ok, the real translation is up. I try to update but it said that this current version software is not compatible with my vstabi.:confused:

I had the same issue. Go to Online Update under the file menu to update to 16.

Rob

[fireup]

I had the same issue. Go to Online Update under the file menu to update to 16.

Rob

Yep, figured it out after I played around with the software.

[Eyon]

anybody get it to work with the old serial version of the v-bar

[fireup]

anybody get it to work with the old serial version of the v-bar
Did you use "Online Update.." under the File menu?

[markjj]

Ian- you can chose Standard or serial, so I guess it'll work with both.

Just downloaded and ready to go but the darn weather is pants- heavy rain and blowing a gale....

Anyone tell any difference in flight?


Cheers.

[rscamp]

It feels like the cyclic is better controlled to me. This makes sense given the higher proportional gain.

Two thumbs up here.

[OICU812]

I tried it today, its an improvement imho on the low stuff, I like extended better for the FFF however. As per John R, I upped the Aileron to 200 gain and Ail AOF to 2/60, that works well for sure. Other then that I left the converted file of my original alone.

[Eyon]

tried it too last night. needs a bit of tinkering, but it did feel great. was in a small space, when the wind dies down, ill try flying it properly, see how the new elevator control fairs in fast backwards, especially tail slides, it never liked big ones of them

Ian

[fireup]

First flight without checking gain didn't go so well. The heli started oscillating very fast in FFF and boom strike in the air about 150 ft. high up. Fell to the ground and boom landed about 50ft away.

Fixed it back up in about 40 min. and turn down the gain and flew a lot better after that.

http://www.helifreak.com/attachment.php?attachmentid=54143&d=1215477791

[th3tick]

First flight without checking gain didn't go so well. The heli started oscillating very fast in FFF and boom strike in the air about 150 ft. high up. Fell to the ground and boom landed about 50ft away.

Fixed it back up in about 40 min. and turn down the gain and flew a lot better after that.

Which gain do you mean?

TIA,
John

[fireup]

Which gain do you mean?

TIA,
John

When I updated the softare and switched from Extended to Ultra, The Proportional Gain for the cyclic range changed from 0 - 120 to 0 - 500. It also try to re-scale my old gain value but it was too high. I had to lower it to about 250 for it to fly without osillation.

[OICU812]

Man that sucks Kevin!!! Sorry to hear that dude! Yea trhe range is very different to say least, I started at 100 and went up slowly and left elevator at default, for my heli the 6003D it seems 200 on aileron is good and much more starts doing strange things...

[Eyon]

just a small tip, make sure the aileron gain is HIGH, it makes cracking awesome :D

[th3tick]

For mine, I copied bank 0 to 1, and made it Ultra on the new copy. That scaled my 105 Main Rotor gain to 300, but no oscillations. This is on my Logo 500.

Confusingly, on the Cyclic page, the Cyclic Gain shows 100. So 300=100?

I'm still not seeing any aileron gain...

Sorry to hear about the boom strike. I now feel a bit lucky that my 300 didn't cause any issues.

John

[hamslice]

For mine, I copied bank 0 to 1, and made it Ultra on the new copy. That scaled my 105 Main Rotor gain to 300, but no oscillations. This is on my Logo 500.

Confusingly, on the Cyclic page, the Cyclic Gain shows 100. So 300=100?

I'm still not seeing any aileron gain...

Sorry to hear about the boom strike. I now feel a bit lucky that my 300 didn't cause any issues.

John

i too do not see an ail gain?

[fireup]

For mine, I copied bank 0 to 1, and made it Ultra on the new copy. That scaled my 105 Main Rotor gain to 300, but no oscillations. This is on my Logo 500.

Confusingly, on the Cyclic page, the Cyclic Gain shows 100. So 300=100?

I'm still not seeing any aileron gain...

Sorry to hear about the boom strike. I now feel a bit lucky that my 300 didn't cause any issues.

John

"Cyclic Gain" in the Cyclic tab is not the same as "Main Rotor Gain" on the Fit Parameters tab. "Main Rotor Gain" is actually "Elevator Proportional"

The aileron gain part is the "Aileron Proportional"

[hamslice]

ok, i did not know that.

thanks