Сегодня знаменитый пилот Mirko Cesena, любезно ответил на мои вопросы.
Он также разрешил опубликовать данную переписку, но просил обатить ваше внимание, что это его собственное видение пилота, а не мнение Микадо!
Вся переписка приводится здесь "как есть", т.е. без изменений.
Надеюсь Вам также будет это интересно:
НиколайGood afternoon, Mirko!
I'm glad to meet you in Moscow this year. These were unforgettable days for us!
I'm asking for your help. We do not understand how to correctly choose the values of P lim +, Plim-, Integ of governer the NEO.
Information with VStabi and SmackTalk video is known to us, but it does not disclose this issue.
I ask you to share your experience in setting up governer the NEO.
We are confused and tired of arguing. All my friends asked me to write to you!
Thank you.
Untitled by
Nikolay Smirnov, on Flickr
Untitled by
Nikolay Smirnov, on Flickr
MirkoYou already red this?:
Proportional Limiter
This limits the maximal proportional value used. A limiter set to 0 will disable the p amount completely. The limiter is needed to avoid too quick throttle changes which overload the motor. In some cases its better to give up some headspeed, but to overload the motor. This is done with this limiter. The Headspeed wil change more if the limiter is reduced. The overall stability is better with a small limiter.
Mirkohttp://www.vstabi.info/en/node/2031Electric Gov Setup | VStabi
As there are some customers asking how to set up a eletric basically right - we want to explain some things here. Please mention that the most important setup values are "static" ones:
vstabi.info
НиколайWe studied this scheme! According to her logic, which of the two photos are true?
MirkoReferring to the graphic: the center bold red line is the speed you setter in the governor. Going to right or left, the speed increases to compensate the pitch variations. Above this red line the governor increases speed to compensate the speed reduction following a increased effort on the rotor, under the red line the governor reduces speed to compensate an effort reductions on the rotor.
MirkoP+ determines how fast the governor increases the motor speed during compensation, P- determines how fast the governor reduces the motor speed during compensation.
In practice: you set these parameters to 0 and will experiment speed reduction when effort increases on the rotor.
НиколайHowever, there is still such a question, are the values of P lim +, Plim- dimensionless (relative) or is it a dimensional value (for example,% of throttle)?
MirkoIncreasing the value you will see that this effect is reduced. When you feel few speed variations, this is the right value. Increasing too much means more stress for the motor.
According to me they must be a % of the throttle, because the governor compensation is a % or the throttle.
Of
If you run at 100 rpm, compensation may be +/- 10 rpm, if you run at 1000 rpm, compensation may be +/- 100 rpm
НиколайShow me an example of your values, please. I did not just send two photos. They have different logic.
MirkoYour pictures show a (1) different setting P+/P- or (2) the same setting
And different values.
Untitled by
Nikolay Smirnov, on Flickr
Николай1) Plim-=BasicTr 75 - 25= 55, Plim+=BasicTr 75+25= 75
Mirko 
Николай2) Plim- = 0 - 30 = 30, Plim+ = 0 + 30 = 30
0 - central relative importance in the second case and BasicThr in the first.
НиколайNow I understand more...
MirkoЗначок «Большой палец вверх»
Mirko НиколайFrom the scheme, which at VStabi, does not follow the information about the reference point (where 0 is located) for the values P+/P-
MirkoIt’s a personal feeling matter. May be that my setting isn’t the best for other pilots, but I feel good with this now. May be that I’ll change in future, because tastes normally changes.
For example, it’s like piloting a nitro, that has a lot of motor variations, but it’s the matter why pilots appreciate it ...
The scheme shows the amount of the variations, not the speed of the variations themselves
НиколайI understand
Thank you very much, Mirko! I took away your precious time, but we needed to know!
Do you mind if I post your answers on the forum of our club?
You, too, can write whatever you want, that we should know.
MirkoI’m not so expert, but what I understand is that the two segmented red lines are the P+ and P- limits. 0 means that these lines collapse on the bold red line.
I believe that increasing the limits will increase the speed of the variations, this is why Uli (the developer) write that the motor is more stressed with high P values.
Of course you can post. Keep care that this is my understanding of the P matter, not Mikado official ...
НиколайOf course, you do not have to worry about it.
MirkoIn synthesis: the bold red line are the desired RPM. The V shape is because a collective compensation is settled. When you increase collective, RPM increase of an amount proportional to collective variation.
When an increased effort affects the rotor, the governor compensates of an amount proportional to the effort increase.
To a fixed amount of effort, it corresponds a RPM governor compensation determined by P+. Viceversa, to a fixed reduction of rotor effort, it corresponds a governor RPM reduction that is determined by P-.
The result is no RPM variation, because the hypothetical RPM reduction due to the rotor effort increase is compensated by the governor RPM increase, at the same time.
If RPM hypothetical reduction goes over the P+ limit curve, the governor stops at P+, so RPM variation will happen.
This is my understanding of the graphic
НиколайWhat do you think, in which case can the values P+ and P- have different values? Why are they given two parameters in Expert menu the VControl ? They may not be symmetrical?
MirkoIn my opinion: normally when governor increases RPM give to the motor more current and increases the poles driving frequency. So the speed of increase is mainly determined by the electric behaviour of the motor (I.e. pole inductance). When governor reduces speed, it cuts out current and reduce the frequency driving of the poles, but the behaviour is more affected by inertial characteristics of the motor (outrunner weight). To obtain the same results in acceleration and deceleration may be that different P value are needed.
MirkoIt’s like accelerating or decelerating a car motor, the two processes have different behaviour
НиколайThank you for your answers. It was important for us!
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Hастройка Governer V-Bar
Тема: Hастройка Governer V-Bar (Прочитано 7677 раз)