BMW GS 6-axis IMU Explained - Inertial Measurement Unit - Gyroscope and Accelerometer sensor 6-Axes
ฝัง
- เผยแพร่เมื่อ 2 ก.ค. 2024
- BMW R 1250GS - Motorbike / Motorcycle 6-Axis IMU “Inertial Measurement Unit” explained. The six degrees of freedom or also called The six degrees of movement.
What does an IMU do ?
What does an IMU measure ?
In this episode we explore Roll, Pitch and Yaw, plus Thrust, Heave and Sway. I use the BMW R 1250GS as an example in this episode to help you understand the 3-axis that the Gyroscope measures - Roll, Pitch and Yaw, and the 3-axis the Accelerometer measures - forward-backward, up-down and right-left directions, which is sometimes called Thrust, Heave and Sway. However, a lot of what I share will apply to many different motorcycles from a wide range of brands. BMW S1000RR or the Ducati Panigale for example.
It’s important to understand that some manufactures only use a limited selection of the sensor systems they install on a motorbike to control its movement. Just because a manufacturer has a 6-axis IMU doesn’t mean they all provide the same level of performance or control… There is in fact a huge difference between them and the safety features they offer.
For some of you that have been following the channel since it started (Thank-you), you will recall I explained the basics of the IMU back in episode 12B, but due to the number of questions I still get asked I decided to make one video that explained things in a simpler way including some examples of how the software development engineers can use the data received from these sensors.
My hope is that you will have a better understanding of the 6-axis IMU from this video.
If you have any questions, just leave me a comment and I will reply…
BUT:
If you would like a much more in-depth understanding, and if enough subscribers ask for it, I will make a longer video to help viewers understand more of the systems and the algorithms that the software designers use to help control our motorbikes and create the increasing number of ride modes and track modes.
Hopefully you enjoy the content I create, so by Subscribing you are letting me know, that you appreciate the effort and time I invest in creating these episodes, and it also helps to grow and develop the channel.
Best Wishes, Carl
00:00 Start
00:40 Ride Mode Chart
01:05 The IMU
01:56 3-Axis Accelerometer
02:56 3-Axis Gyroscope
05:51 The Speed of movement
08:22 The 4 Classes of IMU
10:41 Rode Mode
11:52 Dynamic Mode
12:45 Dyna-Pro Mode - ยานยนต์และพาหนะ
Thanks, Carl, I have really learned a lot. Your videos are really very good and very easy to understand.
Thank you 🙏 much appreciated 🙋🏻♂️
THIS is spot on. I have seen several videos describing various aspects of the IMU but this video is the IMU in a nutshell. Thank you. 😎
Thank you 🙏 have a great weekend ahead, Carl
Same principle as the Inertial Reference/Navigation Systems in aircraft. But you ( presumably not a pilot) have explained how one works better than any sim instructor at CAE or FlightSafety that I ever had!
No not a pilot 🧑✈️, but thank you for your feedback I try to keep things simple so all owners of all abilities can understand the basic concept.
Best wishes Carl
@@justthewayitis The stick and the tennis balls were genius!
🙏🙋🏻♂️ smile
Excellent video Carl, enjoyed it quite a lot.
Thanks Correy 🙏
IMU explanation very nicely explained. 👍. Pro mode is for user programmable input. I never use it as I’m not a stuntman 🤗🤣. Great video overall.
Hi William. Thank you 🙏 there is a lot more to it but at least it give owners an overview of its functions.
Have a great weekend with your Multistrada 🙋🏻♂️
Thanks Carl. I followed that perfectly because of the way you explained it. I'm a programmer and an electronics technician but that doesn't mean I disrespect the effort you have provided for increasing our understanding, or BMW's effort for providing the technology.
I'm not sure if this was an example, but I was rolling down a steep, mossy and slippery driveway. The bike (R1250GS) started to slip as I had both brakes applied, but it seemed to self correct and I continued as if there was no problem. The only time I've ever dropped her (my bike) was at a complete standstill due to a fail on my part with the foot stand. Thankful for the crash bars and only a single scrape under one crash bar which you would have to be underneath the bike to see. Always put crash bars on these beauties guys!
Hi Michael, thank you for leaving a message it’s nice to hear the videos I make are useful. Technically there is a lot more to it as I’m sure you are well aware, but I try to keep it simple and easy to follow and cover the basics so riders have a better understanding of the systems. Finding a balance between full detailed explanations and still engaging viewers is something I battle with while making each video, this particular one was originally much longer and in more depth but I decided to reduce it this time.
Thank you for leaving a comment 🙏
Kindest regards Carl
As usual a great video. Thank you, Carl!
Hi Michiel 🙏🙋🏻♂️
The physics and technology in this sensor is amazing.
The only issue is BMW should place a huge warning notice on it saying "don't touch"! I once had to advise a keen diy expert who had unscrewed the sensor and placed it under the rear cover unsecured in order to fit his ezcan 😮
Hi Nick greetings 🙋🏻♂️yes some folk do not understand what these devices are and move them. Glad you were able to assist this new rider, and saved him an accident.
Carl
Awesome as always Carl. We learn something every time!
Thanks Bruce 🙏
Well now, that was informative. I have exactly zero questions. Top job Carl.
Then my work is done 🙏. Thanks Bradley
But there’s a lot more to tell, perhaps in another video 😉
Thanks Carl!
really good explanation.
I really appreciate your videos. 👍
ciao!
👍🙋🏻♂️, thank you 🙏
Carl....you never cease to amaze me with your videos!!! Excellent explanation!!!!
Hi Fred, thank you 🙏 glad you enjoyed it. Carl 🙋🏻♂️
Same opinion, thank you carl, actually I tried the dynamic pro on a save spot, and the enduro pro in Hechlingen on a training. With those information, everything makes sense... by the way, both pro seetings are much fun 🙂
@DanieleImhof-mx7vc : Glad you enjoyed the episode and thank you for your feedback 🙋🏻♂️🙏
I believe that this kind of knowledge is as important as practicing on a bike in terms of safety riding.
Thank you 🙏
Thank you so much for this splendid explanation.
Hello RG500, thank you 🙏
Hi Carl, I’m sure you’re already aware but wanted to put it out to fellow GS/GSA riders that yesterday 19/04/24 Hex have updated software and firmware on gs911 so you can now turn off both front and rear running lights effectively concerting your 22/23/24 indicators back to 2021, just good old fashioned orange turn signals . I believe you can also adjust large rear light brightness for tail and brake light .
Sleep happy fellow GS/GSA riders . And thanks Hex for sorting such a dangerous lighting system out !!!
Hi Peter, good morning and thank you for letting me know about the update, a couple of subscribers have already highlighted this to me . Overall, I think its great news, but we also need to think about the bigger picture. If we as owners add an accessory or product to our motorbikes it does not generally affect warranty. BUT if we make ANY changes to the OEM coding or software that is installed on our motorbikes, we immediately invalidate any warranty.
So, although the GS-911 device can add additional screens and make changes to the OEM coding that affect our indicator functions, owners need to be fully aware that any change will immediately invalidate our warranty.
I have had this confirmed by two separate dealerships.
Providing owners are aware of this and are prepared to accept the responsibility then that’s great. But each of us individually, need to make this decision.
Thank you for reaching out to me, much appreciated, and I think this whole topic perhaps needs its own video.
kind regards Carl
Thank you. Very clear and concise information. You really know how to communicate well. I appreciate it 👍
Thank you Jeff 👍, glad you enjoyed it
Clever stuff thanks for the explanations. Nice to understand your bike and the technology 👍👍👍
Thank you 🙏 Andrew, yes I think it’s important we understand the technology we have on our motorbikes.
Regards Carl
Absolute top bloke! IMU explained perfectly 😊
🙋🏻♂️🙏 thank you
Well explained Carl, as always. Thank you
Cheers Fred 👍
Thanks for another great video! BTW, I believe the accelerometer also measures sideways g-forces in a turn. Good info when combined with lean angle. Thanks again!
Hi Kramer, thanks for the feedback 👍
Hi Kramer, thanks for the feedback 👍
Yes, the Accelerometer also measures G-force, we don’t see more than 1.0 to 1.1 on our motorbikes, sometimes a little more on race bikes.
Carl
wow. Excellent video. Thank you.
Hi Alaska, thank you 🙏
The more information, the better. Thanks for sharing Carl!
Glad you enjoyed it 👍 Edward
Excellent work.
Thank you 🙏
Another cracking video Carl. I’m going to send this to my son as he asked me what it does and I had no idea 😅😅
Hi Slip, thank you , and I hope your Son enjoys it too. Carl 👍
Great video, as usual
🙋🏻♂️ Hi Michael
Awesome video! Very informative and answered a lot of questions. Well done. Best!
Thank you Creed. 👍
Hi Carl, again, a very interesting & well prepared episode! Finally began my riding season with my GS 1250 🥳 Thanks, Marc, Quebec 😉🏍
Hi Marc, greetings to you and your wife, we hope you have a great season ahead 🙏👍
A well explained video.
Cheers Simon 👍
Great stuff Bro.
Its amazing how much these modes do.
Turn it all off and I promise you the 1250 will 12 oclock with one little crack of the throttle.
I wish BMW could work out how to skyhook us. Keeping us flat and the suspension doing all the work instead of bouncing us around everywhere.
That would be cool! and a great idea Craig, the new 1300 is closer to that, but still not quite there. 👍
did you notice i kept it short this time !!! smile
Cheers mate. A great explanation and easily understood! 👍🏻
Hi Ben, thank you 🙏
Glad you enjoyed it 👍, Carl
@@justthewayitis I did :). Nothing wrong with long form Carl though.
Absolutely fascinating! Despite riding bikes for the last 45yrs I still get nervous about apply the brakes when wet….but it’s great to know that when I do someone has engineered the bike to initiate the most appropriate response!
One quick question though? Towards the end you mentioned that the algorithm used the performance of the tyres as part of the equation. This being the case, is it safe to assume therefore that the difference in tyre brands when considering traction/adhesion is relatively small or is it that the tyre performance characteristics don’t have a significant “priority weighting” in the overall algorithm?
Keep up the great work!
Hi great question, years ago when you and I started riding motorbikes, there was a lot a difference between tyre brands, some good and some horrible 😉, but now things are very different and they are all pretty good. The testing and breakaway point for tyres would have been set using standard tyres that bmw supplied on the bike from new plus a little extra margin so doubt any of us mere mortals would exceed the limits set during testing. Although I personally would not want to test that with full off-road tyres but I’m sure the testers did.
But then again bmw do state that when using Enduro Pro to only full off road tyres should be used, so I would imagine the abs setting is different in that mode.
Hope that helps
Kind regards Carl
Hi Carl, god you know your stuff and explain it so well .
I think the electronics in my 1250 GSA are some of the best , the bike just gives me so much confidence you have to think the bike really is working everything out for me so i look and feel like a top rider .
Do you agree that bmw seem to be class leading in electronics department ?
Hi Peter, thank you for your feedback 🙏, all the manufacturers are doing well, but possibly BMW and Ducati are currently at the top of there game with regard to electronics and system control.
I would imagine the guys who take their bikes on track would say Ducati for system control.
Best wishes Carl
Another first class explanation, thank you! Any chance of a download of that spreadsheet?
Hi Tim, thank you 🙏 send me an email the address is found on the channel pages. Regards Carl
Hi I’m from El Salvador, Central America, I always find your videos extremely helpful! And have shared a lot of them. Can you please share your riding modes chart as an image or the excel link. It’s very useful but when you capture it as a screenshot it is legible…
Thanks
Francisco
*not legible
Hi Francisco, send me an email, address is on my channel
I’m looking forward to seeing your video on the R1300GS, I think it’s been delayed because of bad weather. Can you say when it’s likely to be available?
Many thanks.
Hi Chris, good morning, I do have the first comparison video up on the channel. However I currently do have the second R1300GS TB version here at the moment on test from BMW and I am in the middle of making 3 new episodes for it.
The first episode is going to be about suspension and what the new EVO upgrade brings and understanding the importance of choosing the right options. I hope to have that up on the channel within 10 days ish.
Kindest regards Carl
Great Video and explanation, maybe a "stupid" question, but would those systems help you if you run into diesel on the road for example? Thanks !
Yes, I would like to know that? With all the complex electronics makes you wonder how any rider ever drops their GS etc.
At the back of my mind I’m thinking so much clever electronics, all likely to go wrong eventually, expensive to troubleshoot and replace, aware of diagnostic tool. Now I know why I’ve been advised never let a new bmw go out of warranty.
Hi Guzziman, sadly no system can predict a sudden loss of surface traction, like Diesel or Oil, we still need to be careful and aware while riding. Thank you for your feedback 👍🙏
Hi Jean, these electronic components are actually fairly reliable and robust. Yes occasionally they fail, but in general they will last for many years giving great service.
You would probably crash but with less wheelspin...
@nikoscosmos 😊