Betaflight 4.5 Filter Tuning

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Get my ENTIRE Betaflight 4.5 Tuning Guide covering Filters, PIDs, and Rates as a PDF here: www.patreon.com/collection/435076?view=expanded
Timestamps:
0:00 Intro
0:50 Blackbox Settings
2:30 Viewing Blackbox Logs
4:09 Filter Sections
4:47 Get the whole guide as a PDF
5:16 Expert Mode ENGAGED!
5:32 Gyro Filters
7:26 RPM Filtering
8:43 RPM Crossfading
10:25 RPM Filter Q Factor
11:41 Biblade vs Triblade
12:35 RPM Filter Dimming
14:07 Dynamic Notch Filter Count
16:19 Dynamic Notch Frequency
14:07 Dynamic Notch Q Factor
18:37 D Term Low pass filters
19:11 Default vs AOS D Term Tune
22:49 Karate D Term Tuning
23:20 AOS D Term Tuning
24:11 Dynamic Curve Expo
25:25 Yaw Lowpass Filter
26:33 Next Steps

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Опубликовано:

29 мар 2024

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Комментарии : 123

@TriMeX1987 3 дня назад

Just a suggestion what I kind of miss is what to do for a test flight... to get the gyro data. And maybe do this in the future with one of your friends/ patreons to start of with a less of a good build/quad. and take it step by step how to tune it to fly really good. For example for myself I run into this problem trying to tune a 2.5 inch qav frame wich is a whoop and needs to run in pretty warm weather.. can't use the hot motors. I do as allways enjoy the content and the way you explain it.

@TWEECH45 2 месяца назад

This is a great video! I’ve watched so much about filters but nobody dives as deep into what the numbers actually mean and how to adjust them.

@inCarsoNatedFPV Месяц назад

I’ve been consistently watching your videos the last couple of years. You’re not only very knowledgeable, you’re a great teacher as well. Anyway, this is the video that put me over the edge- guilt has overwhelmed me considering I’ve been receiving all this knowledge goodness for free and I haven’t given you anything in return. Today is the day I buy a year membership on your Pattern😎 Thank you again for all you do.

@jeffparisse4202 Месяц назад

This video was so good, I bought an AOS Hoodie! I’ll wear it in the Hawthorne Aerospace Corridor on a daily basis. SpaceX, Aerospace Corp, Lockheed Martin, Raytheon, Northrop Grumman and the LAAFB (home of GPS) are all within walking distance of my house.

@mrthingdudeman 27 дней назад

SouthBay represent. That is a big corridor, my man.

@jeffparisse4202 26 дней назад

@@mrthingdudeman Well I exaggerated a bit with SpaceX… it is 2.5 miles away at the Hawthorne Airport. 😇

@jacekkaczmarczyk_drones 2 месяца назад

Great video Chris, amazing work!!!!

@kmarlow1 2 месяца назад

Very detailed explanation! Much appreciated!

@Nemesishk 2 месяца назад

Appreciate these videos a lot, learned much from you. keep it up Chris

@MrPepyaker 2 месяца назад

Great video, with a very detailed explanation. Thank you a lot, Chris!

@jumpstartfpv 2 месяца назад

Superb timing. I was starting to wonder when you'll update this.

@yamasaur Месяц назад

Exactly the video I was looking for when trying to figure more out about tuning! Thanks for this great video!

@jimmyarroyo356 Месяц назад

An updated tuning guide... I'm gonna join your patreon right now.

@VasylDemianov Месяц назад

Just as I am about to start tuning my new quad, this video comes out! Perfect!)

@sebcbien263 Месяц назад

Amazing video, so knowledgeable and informative. Thanks a lot!

@moonraker814 Месяц назад

Thank you as always Chris! I'm following this series closely to dial in my AOS 3.5 V5.

@cineflight1171 20 дней назад

I love your work, thanks a lot for your effort👍💪🔥

@ronboFPV Месяц назад

Just re flashed all my Quads to 4.5 now to start tunning, thanks for the in depth video and information. Very nice work.

@johncgibson4720 Месяц назад

Just watched your episode about BMI and MPU gyro filters. Excellent work and presentation and tech prowess.

@lixxfpv Месяц назад

This Video comes in clutch, planned to tune my Quads today👌😊

@batdronefpv Месяц назад

THX for your great work 💥💥

@dukedblu Месяц назад

Thank you, explained very well

@RobertTheFriscoSchmid Месяц назад

This is the best FILTER TUNE video I have seen, and I watched a few walking away puzzled, even your older ones :-) ... THANKS

@fpvfanatic 19 дней назад

Great great video about filters. I've watched so many of them and this video here has finally made me understand what filter does what and how to properly use them. 🙇‍♂️ down to you Chris.

@Mad_Voyager Месяц назад

Great job! thank you sir!

@Mekanikern Месяц назад

Thanx Chris, very good video! I miss one thing though, RC filtering.

@alexdefelice2448 2 месяца назад

This is the video I was waiting for before "spring cleaning" and reflashing my quads.

@tootfpv Месяц назад

I’d pay for you to give lectures like this! Great video!

@mrthingdudeman 27 дней назад

I think this is the first video that I have watched on BF filters, where everything is explained and reasons are properly explained. Im very much interested in tuning quads, but it always seems it's a black art. It appears that everyone comes from this subject with a different perspective and this video seems to explain it such a way where I can filter my quad knowing if I see an issue, I have the knowledge to make the proper adjustment.

@johncgibson4720 Месяц назад

I use betaflight 4.3 for my helicopter that the main rotor spins at the fixed 50 Hz. Your previous episode inspired me to do the v-shape filter on 50Hz and cut out everything past 50Hz. I do vertical dives with the heli and the terminal velocity is where the problem kicks in.

@daan-the-maan Месяц назад

Thanks!

@theaman4005 Месяц назад

Nice video pal. So glad you confirmed the linear value of 5, for d term expo - I've noticed the "filter line" in black box explorer doesn't seem to change when you adjust the expo in betaflight.

@marinehm Месяц назад

Awesome! You were either reading my mind or saw a comment about this in one of the other videos. This is just what I needed to learn black box and get the information I needed to tune my quads PROPERLY! At 2:50 you mention BB Explorer will be a link to the latest version in the description below. The link is not there.

@Thomy_fpv Месяц назад

Thank you 🫵🏼🙏🏼

@MarcBergenthal007 Месяц назад

This is a great video! Many thanks. I have one question and I think it was not covered. How would loose parts make themselves visible on the chart? Would they appear as vertical lines linke the frame resonance or horizontal lines? I was also wondering if you could comment on the very faded horizontal lines that were hardly visible on your graph. Many thanks again! 😊

@demvlad2 Месяц назад

Thank You!

@cbrown3063 Месяц назад

I appreciate this. 'Just built a 'fiddly' UL7. Its gonna'be a very good tune

@DriftaholiC Месяц назад

Awesome, looks like a retune for 4.5

@inCarsoNatedFPV Месяц назад

2 things. 1- fantastic story teller! Thank you so much for sharing the experience. 2- Ya gotta visit Chili and or Argentina; your kind of geography😎

@user-yk1cw8im4h 2 месяца назад

Amazing work! Learned so much! (Just pretending I understand this video like everyone else, to be frank how many people actually understand this stuff unless they have a phd in EE?)

@ruirpm Месяц назад

What😮?

@ruirpm Месяц назад

What😮?

@sebastienboury Месяц назад

Always awesome video ! I have a question about the impact of the TPA breakpoint when you tune the filters?

@bawonohari7520 Месяц назад

Great, love that..

@kenimhof9333 2 месяца назад

Excellent information. Does this directly apply when using 3d bidirectional reversing motors.

@undeze Месяц назад

Thanks for the video. I've read elsewhere that BiQuad filters should be avoided, specifically in BF4.3, due to them being very consuming of resources. It was suggested to use PT1 filters instead. What are you thoughts on BiQuad vs. PT1 filters in BF4.5? Thanks.

@user-wz7ch1mq9h 2 месяца назад

Great Video Chris ! Are you going to release 4.5 Betaflight presets by any chance 🙏?I’m currently in the middle of an Aos 5.5 Evo built ,I would love the benefits of 4.5 eventually but might stick On 4.4 due to your presets & filters . As this is my 1st 6s build what would you do if me ? 😎👍

@antonmashko 6 дней назад

Thank you for a great video! Is there any way to backup filter settings using CLI?

@dabfpv 2 месяца назад

Good timing :) I just installed bf4.5 on my AOS 7

@PistiBala Месяц назад

Dear Chris! You are so clever, I think you can write a script that analyze the noises from blackbox and gives a recommendation for datas to write in the configurator. Do I think it right? 👍

@filipefrango1671 Месяц назад

Hey Chris, amazing video, thank you very much!!! got a quick Question, i have Speedbee F7 V3 witch has BMI270 at 3.20 kHz Gyro(due to BMI270) and 3.20 kHz PID loop, do i still need Gyro lowpass2 ON? thanks a lot

@suicidequad Месяц назад

chris your such a legend. can't believe this is free content. happy to be your patreon. learned alot of new things already on the first watch.

@ProjectMockingbird Месяц назад

Dude, really appreciate this video on filters and how 4.5 treats things. Gave me a great baseline to tackling Whoops and their unique noise profiles. Any benefit to using a PT3 filter on Gyro 2 for aliasing, or is PT1 still best?

@Renaissancedubois Месяц назад

Very interesting thank you 🙏 but something that I ask myself every time and which we don't hear much about is at what level of brightness / zoom the noise must absolutely be filtered because it would cause problems, white? because on some of my drones there remains light red everywhere after filtering but it flies well

@arpan.sarkar Месяц назад

Can you please do tuning stuffs for inav also. There are lots of tutorials on beta flight tuning but very less resources for inav. 😢

@larstobler6047 Месяц назад

Danke!

@props_in_view 26 дней назад

I'm unable to turn on the analyser display in the overlay menu. I've imported a log file, but when I click on "View/Hide analyser", nothing happens. However, I can toggle on/off the craft display and stick display. Have you come across this issue or am I missing something?

@tmsrc 26 дней назад

I was facing the same problem click the gear icon on the right of the black area to show the legend press graph setup add graph then select debug

@props_in_view 26 дней назад

@@tmsrc That's great - thanks a lot!

@tmsrc 25 дней назад

@@props_in_view your welcome it took me a week to figure it out 😂

@johncgibson4720 Месяц назад

4:35 The static notch filter is crucial for single rotor helicopter with RPM governors for fixed Hz noises. I hope betaflight never removes it.

@mgbfpv Месяц назад

Hi Chris. You don't talk about props (or I didn't get that part). What happens if I loose a blade after a crash and try to bring back the quad flying to my position? Are some pretty tight filters more prone to create issues with props damage than others? Can I push some filters to the limit without be worried of burn a motor if I fly with smashed props? As usual your videos are very helpful. Thanks.

@carterdavis5176 Месяц назад

2:46 the Blackbox explorer is not linked in the description as stated in the video.

@alshatti_fit Месяц назад

hey chris > How do I know whether the vibrations are from the curve or , the min, or the max frequency ?

@marcogreco892 3 дня назад

Hey @ChrisRosser do you know why Axisflying suggest on FC with BMI270 Gyro to activate lowpass Filter 2 with a 135Hz frequency and PT2 Type? If I look at your guide this setup have no sense

@sebastienboury Месяц назад

Why do you use a Biquad and not a PT3 for the D term filter ? Thanks

@InertiaFPV 21 день назад

Great video! However don't you think it is best to tune the PIDs before tuning the filters? The reason being is that if your PIDs have a bad tune then you're going to get majorly bad motor/frame osolations anyway. I think it makes more sense to tune the PIDs using the PIDtoolbox then coming into BF and tuning the filters to finely tune the kwad?

@danielnoname8352 26 дней назад

Hi, regarding Blackbox Explorer 3.6 - is there the JSON file for "base config" the same as UAVTECH published for 3.5? I am trying to look for it but found nothing and JSON for 3.5 is not loading for 3.6.

@dand.1941 8 дней назад

What kind of movement should I do to get the blackbox information needed? Should I just slowly increase throttle until it reaches 100% or big punches ? Sorry if it is obvious

@ungravityfpv Месяц назад

BLESSS

@elmarirony5580 Месяц назад

Hello Chris! Just 1 question to You: The Filter Tuning/RPM-Filtering works only with Stm32-Esc or also with Standard ESC? Thanks / BR Elmar

@paparambo2557 Месяц назад

i just dont see harmonic motornoice of my motors on my 2 bladed quad. what gyro rpm filter should i use then?

@ADfpv Месяц назад

Tryd it on my cinelog 25 v2. Helpd with the flying but, now when throttle is at 0% quad rolls right and twich... any suggestions?

@divingfalconfpv4602 Месяц назад

Dont think i have any frame resonances. I dont remember seeing any vertical. I lowered min closer to min motor noise. 10" quad so seems to be like 75 to 80hz noise starts. But all look like motor noise not vertical. So i should just raise dynamic notch back up to save delay. Maybe remove a low pass filter for less delay.

@MactacFPV Месяц назад

Sometimes I find that I have wobble/vibration caused by the PID loop with non-standard builds. Without realizing this, I start setting the filters and end up being way too heavy on the filters, when it's really something weird in the PID loop. How do you set a "neutral" set of PIDs to tune the filters? Or is there an easy way to determine if an oscillation is due to the PID loop vs noise?

@AndyDreadFPV Месяц назад

With non-standard builds you're off the beaten path. If it's a bigger quad then I would lower the main PID slider just to get the thing flying stable if its a tiny quad then go in the opposite direction. in general If you have high power-to-weight ratio then lower the main PID slider if you have lower power-to-weight ratio then increase it.

@AndreasFelix Месяц назад

Would have loved to see how the Blackbox log flights were done.

@eisenverbieger82 Месяц назад

Why are you using the biquad filter instead of BT3? I read in several tutorials, that the filter of the type PT3 has a stronger filter effect and less delay compared to the biquad filter?

@benmintz3188 Месяц назад

Is there a good place to understand how to tune a 3" 3S toothpick?

@Mojohoojo187 Месяц назад

anyone knows why at @5:33 the slide says increase Gyro filter multiplier to 2.0 (Less filtering when we suppose to be filtering)?

@rgglenn150 Месяц назад

how do you record blackbox? flying? or just idling?

@OneTakeFPV Месяц назад

you will update your presets for 4.5 soon ?

@TabulaRasa001 Месяц назад

If you’re setting one of your rpm_filter_weights values for a tri-blade to zero wouldn’t it be better to reduce the number of harmonics from 3 to 2?

@christopherconkright1317 Месяц назад

23:59 what do oscillations sound like?

@maryjane136 2 месяца назад

Brilliant video, thank you. Why did not someone implement a function to read recorded raw gyro data from a UART to feed the PID loop and do a recording into the internal memory as usual? So I would be able to test filter settings on the bench.

@emtbbam2895 2 месяца назад

KarateBrot should do this.

@cinemoriahFPV Месяц назад

You can use cli commands to do that.

@emtbbam2895 Месяц назад

@@cinemoriahFPV Oh, okay. Can you tell how? Or give an advice which commands to use?

@maryjane136 Месяц назад

@@cinemoriahFPV I hope you understand this in the right way. You download the btfl_001.bbl and use the data in this file as a source for the simulation. Typically you do not have enough space in the internal flash memory for Blackbox log, so do you have to go the way with the file. The file contents will be feed the FC or a simulator with the same filter calculations. The output will be recorded as usual in the flash memory. Then you can analyze the new btfl_001.bbl like always. Instead of flying and gather the sensor data the data from the file are the source. And this could be done with CLI commands? No way.

@maryjane136 Месяц назад

@@cinemoriahFPV Sorry, but you didn't understand it. There are no CLI commands or any other solution.

@johnwalter6410 21 день назад

NONE of my graphs have this long white shape in the red. All the white is at the begining of the graph. and the colors only go to 60%. What am I doing wrong?

@christopherconkright1317 Месяц назад

Could you show how to do a test flight?

@SeverSevernui-xp7gh Месяц назад

Is something changed in pid tuning process comparing to your btfl 4.3 tuning series?? Those are 2 year old videos. Should I go through them, or they became irrelevant?????

@shotgun2063 Месяц назад

I wonder if I'm doing something wrong, because my graphs never look anything like that.

@cervellimatteo 25 дней назад

I don’t have the black box in my fc on squirt cinewhoop

@christopherconkright1317 Месяц назад

The link for blackbox isn't listed

@Abarovic Месяц назад

I'm following your videos very closely, however I think there is a step missing - how to verify that the applied filters are working? Like, I do the test flight, open the log, see the noise, adjust the filter settings in Betaflight, do another flight, open the log and I see the same noise graph... Do I understand this correctly that Gyro scaled [roll] is the pre-filtered noise graph? If so, then Gyro [roll] is post-filter noise graph? Basically - how to verify that my adjusted filter settings are actually working?

@Renauldo-hy2up Месяц назад

Compare Debug gyro scaled [roll] to Gyro [roll] the Gyro [Roll] should show no noise frequency after 50hz compared to the prefiltered Gyro scaled [Roll]! If you see noise in the Gyro [roll] then either your applied settings aren’t enough or you’re just messing everything up!

@Renauldo-hy2up Месяц назад

If you need help! Send me the pre and post gyro [roll] and your filter settings and I’ll walk you through it! I just tuned my quad and it’s a beast! I have no noise frequency in the Gyro [Roll]

@plop386 Месяц назад

2:55 no link in decription :)

@TaseenAli 2 месяца назад

Anyone else having issues with BF 5 ? on some cases bf is deselecting settings that's already been setup ! happened to me 4-5 times now so far! like uarts would be deselected or rx protocol or presets! and its always random.

@schwarzflieger Месяц назад

so, when BF4.5 will be officially released?

@christopherconkright1317 27 дней назад

If i am doing a 3.6in quad and I don't have the flair upwards what's that mean?

@ChrisRosser 27 дней назад

It likely means you are looking at the filtered rather than raw gyro signal

@christopherconkright1317 27 дней назад

@@ChrisRosser If it is filtered does that mean my current filters are okay?

@christopherconkright1317 27 дней назад

@@ChrisRosser It says max motor noise is 102hz I will rerun the test today but I don't know what to do. I have Newbee flow 3100k motors

@kuldar. Месяц назад

Someone who flies Betafpv Meteor85 and has set up the filter, PID and rates according to this channel, please wrote me. I am new to fpv and would like to try your CLI.

@shotbyarian Месяц назад

i didn't get the raw qyro data with debuq mode = NONE for anyone interested or having the same issue

@Stix0501 Месяц назад

Same, I don't have that option either

@Cloud1242 2 месяца назад

I havent even watched yet, just excited for a Chris Rossed filter refresh.

@alperenozgur Месяц назад

where is new videos 😩

@mlentsch 2 месяца назад

where's 4.5?? I only see 4.4.3

@JLfpv 2 месяца назад

Gotta choose release and release candidates in build option

@sten6537 Месяц назад

I build a quad. Put a preset on it. If it flies good.. great! If it doesn't... well bye bye quad. 😂

@mikenomatter 2 месяца назад

I'm sure your rpm crossfade explanation a bit wrong

@matrodmedia Месяц назад

Soo when you say something like that you’re kinda supposed to explain why

@theaman4005 Месяц назад

I'm pretty sure he was correct. He mentioned starting frequency and fade range - what was your doubt?

@mikenomatter Месяц назад

@@theaman4005 the reason why we need it. it is not because we have less noise in low rmps, it's because in low rpm all harmonics have close frequencies and we get all notches on one frequency that gives huge delay and could cause oscilations

@califpv Месяц назад

Never understood why people want to upgrade to the newest Firmware every time when their builds are flying.... 🤷🏻

@PerceptionFPV Месяц назад

To make them fly better

@suicidequad Месяц назад

whats your opinion on the PT3 filter for D-term lowpass 1? according to the betaflight doc its recommended over both filters youve discussed. i learned alot from this video, thanks a bunch.

@ronboFPV Месяц назад

Thanks!