Example of MoTeC data analysis

[TCSdisable]

I sure someone have problem track map and Wrong Lap time on Sierra and Suzuka (Maybe only issued on 2014).
The problems is produce by some beacons were place wrongly.

Found out the wrong beacons ID

Remove them from Tools > Lap editor to to correct Laps time of Telemetry.
Make sure at least one lap time telemetry could set up as "Trusted Lap" on "Laps" Tab > "Edit".

Them let the Track editor using the correct telemetry source to draw a map, and make sure kind of circuit, for Goodwood or any Point to point layout should pick as "Open Circuit", remember, no GPS data was recorded on GT6 MoTeC right now !

Them track map would be corrected.

 

[YZF]

If one man weighs on average 75kg at 21G he will have to hold 1575kg.
Now lie down on the ground sideways and I will put on you VW Golf which weighs only 1400kg for only one second,and if you are still alive I will believe you.

True, however some drivers during accidents have very high g forces, yet they survive...
"At the United States Grand Prix, Schumacher suffered serious injuries in an accident that occurred on the ninth lap of the race. The deceleration was measured at 78 g (765 m/s²), resulting in a concussion as well as two minor fractures to his spinal column. Schumacher was forced to miss the next six races."

http://en.wikipedia.org/wiki/Ralf_Schumacher

 

[cutmeamango]

Guys watch this video and tell me that 21G is not a mirage

There are four factors (This is a quick simplification, excluding all biomechanical and vehicular structure factors) for tolerance of acceleration:
- The onset of the acceleration, in this case the time it takes to reach peak acceleration (the jerk @Griffith500 mentioned).
- The duration, which is referred as sustained (linear acceleration over time).
- The vector, up/down (head<>foot), front/back and left/right, that can all happen concurrently.
- Acceleration magnitude.

---

What we have with the X2014 are two lat G scenarios:

1: High G onset (35G/s if I don't suck at math), high magnitude acceleration peak (21G), but low duration (~1.1s for the whole acceleration and deceleration).
= This jerk is somewhat similar to what it is experienced in some types of parachute opening, but laterally here. At the 2nd link at the bottom it says impact tests up to 21.6G (much higher onsets) didn't reach a tolerance threshold.
*edit* Adding: The whole section of decreasing jerks last 8secs, don't know if it would constitute a dangerous vibration. Could be the most dangerous part of it all though.

2: High avg. sustained acceleration (~9.8G during ~1.2s, repeatedly).
= Griffith pointed out this could be the troublesome scenario and it would probably be in the long run in terms of discomfort and muscular fatigue. At the first link at the bottom there's a graph about design guidelines of acceleration x time design limits/tolerance for those unconditioned, and this scenario is just slightly above the threshold.

---

Both cases are certainly much above what F1 drivers are exposed, but they are not above thresholds of tolerance (or injury), and that's without accounting the use of specialized designs of anti-G suits, HANS devices, seating and body restrainers for attenuation.

For those interested in better summaries, here and here. Cool article about how HANS work and seatbelts physics. You can too search for free fall survivability studies to see the physiological effects of really high acceleration impacts.

 

[ALB123]

The human body is capable of handling very high G loads for incredibly short periods of time. I'm talking fractions of a second.

 

[Elevenfive]

This is very cool! I need to try this out.

What would be the best track to use with the track overlay? I would like to see the exact line I'm taking, along with braking/ accelerating points.

I gather some tracks aren't as accurate as others for track overlay and require some tweaking?

 

[ALB123]

This is very cool! I need to try this out.

What would be the best track to use with the track overlay? I would like to see the exact line I'm taking, along with braking/ accelerating points.

I gather some tracks aren't as accurate as others for track overlay and require some tweaking?

The software uses precise GPS coordinates to map out the track. I don't think any tracks are going to be "more accurate" than others, however, I haven't even tried 10% of the layouts so I could be wrong.

 

[MatskiMonk]

GPS data only exists for some tracks, the track that the software creates is based on your racing line, not a pre-defined track map as such. I could be wrong about this.

 

[ALB123]

GPS data only exists for some tracks, the track that the software creates is based on your racing line, not a pre-defined track map as such. I could be wrong about this.

Well, there ya go! I stand corrected.

 

[MatskiMonk]

Back a few pages Example of MoTeC data analysis the screen caps I posted of Tsukuba show that it does have GPS data, but you can see from the track editor map how it only actually follows my line, hence the corners are smoothed out, and there's a kink in the line after the first hairpin...

 

[Elevenfive]

Back a few pages Example of MoTeC data analysis the screen caps I posted of Tsukuba show that it does have GPS data, but you can see from the track editor map how it only actually follows my line, hence the corners are smoothed out, and there's a kink in the line after the first hairpin...

I see thanks for the info, I need to play around with this software when I get a chance.


It would be great to see a track overlay on top of the GPS data, to visualize what line is faster or compare braking points etc

 

[YZF]

I see thanks for the info, I need to play around with this software when I get a chance.


It would be great to see a track overlay on top of the GPS data, to visualize what line is faster or compare braking points etc

To find out which line is faster, you use ghost of your own previous best time

 

[MatskiMonk]

I see thanks for the info, I need to play around with this software when I get a chance.


It would be great to see a track overlay on top of the GPS data, to visualize what line is faster or compare braking points etc

In game data logger is probably best for this, as it will sync up to comparative laps, and display the racing liners over the ingame track map, you can then look at the brake pedal trace, the steering angle trace, and the speed trace, on the entry, apex, and exit of the corner respectively, for two laps at the same time. You might be able to do this in the MoTeC software too, but it still doesn't have a track map that will show you two lines that you used against an actual map of the track.

 

[Johnnypenso]

To find out which line is faster, you use ghost of your own previous best time

You know what's a great tool, simple to make, wouldn't cost more than a day's worth of programming and would be hands down, without a doubt, the single most effective hotlapping tool? A session delta app. I found it in Assetto Corsa and it simply tracks in real time, the gap between your current lap and your fastest lap. So if you enter a corner say 0.300 down on your fastest lap and you want to experiment with late braking and a late apex, you do your stuff, and as you exit the corner you glance at the counter and see which way it's going and where you end up entering the next corner. No need for a ghost to interfere with your vision or concentration and of course a ghost isn't effective if it's behind you or you fall a second or two behind after an error. It's been absolutely invaluable for me and tells me in real time, the exact effect of my driving inputs down to the millisecond. I'm watching it sometimes and getting mad because I lose 1/10th between corners!!

 

[YZF]

You know what's a great tool, simple to make, wouldn't cost more than a day's worth of programming and would be hands down, without a doubt, the single most effective hotlapping tool? A session delta app. I found it in Assetto Corsa and it simply tracks in real time, the gap between your current lap and your fastest lap. So if you enter a corner say 0.300 down on your fastest lap and you want to experiment with late braking and a late apex, you do your stuff, and as you exit the corner you glance at the counter and see which way it's going and where you end up entering the next corner. No need for a ghost to interfere with your vision or concentration and of course a ghost isn't effective if it's behind you or you fall a second or two behind after an error. It's been absolutely invaluable for me and tells me in real time, the exact effect of my driving inputs down to the millisecond. I'm watching it sometimes and getting mad because I lose 1/10th between corners!!

Yes, indeed. F1 drivers (IRL) have this kind of system. I have noticed it when watching onboard videos. This should be really invaluable for hotlapping

 

[Elevenfive]

To find out which line is faster, you use ghost of your own previous best time

I'm aware of the ghost and use it, but I'd still like something that I can analyze and look at while not in the middle of driving, something that I can go back to and compare each lap

Something like the attached picture, I think would be helpful, for me at least

 

[yuc2002]

Does this do overlays?

 

[Dyemonic]

Here's a few resources that may help you guys out:


This is a video I made last year for my school's FSAE team. It's long and covers more stuff than what GT6 generates.


MoTeC's video tutorial. Much shorter, but having not watched it I don't know what it covers and what it doesn't.

And attached is a pdf seminar.

 

[azidahaka]

I saved a race replay to see how a certain someone was way too fast >_>

and... wait a second, the export just shows your own datas?

Please someone tell me i'm an idiot and that there's a way to compare a race's best laps from different drivers :/

 

[Elevenfive]

Here's a few resources that may help you guys out:

Thanks for this, your video helped me to figure out how to get the view I wanted

 

[Elevenfive]

I saved a race replay to see how a certain someone was way too fast >_>

and... wait a second, the export just shows your own datas?

Please someone tell me i'm an idiot and that there's a way to compare a race's best laps from different drivers :/

I believe it only records your data not other drivers data

 

[azidahaka]

Damn i feared this... It lowers usefulness a lot :/

 

[Griffith500]

Data recorded from online opponents is very low resolution anyway, and the physical movement of online cars is produced differently. So the data would have gaps and discontinuities, as well as lots of unrealities inherent to the latency compensation mechanisms and low bandwidth requirement for peer to peer communications.

I'm not sure what practical benefit analysing the AI's driving would bring, but it would be fascinating.

 

[ALB123]

Damn i feared this... It lowers usefulness a lot :/

You would have to ask the person you're interested in analyzing for a copy of his MoTeC i2 data files. Then you can open up HIS log file in addition to YOUR log file in the same project and overlay the data.

Of course, if the person forgot to save his replay file or refuses to give you the files then that is a moot point.

 

[azidahaka]

Yup, would have been great for cheaters spotting and finding out show some guys are that fast...

You would have to ask the person you're interested in analyzing for a copy of his MoTeC i2 data files. Then you can open up HIS log file in addition to YOUR log file in the same project and overlay the data.

Of course, if the person forgot to save his replay file or refuses to give you the files then that is a moot point.

 

[Noname0529]

Ok, so this is a thread about GT6 and the MoTeC i2 pro tool.
Post your laps, compare with others, and have fun.
Download link and Steps are here: http://www.motec.com.au/gt6/gt6downloads/
Also if you're gonna post your laps, make sure to include the name of the car and the track.
Here's mine:
Vehicle: Honda RAYBRIG HSV-010 '12
Track: Red Bull Ring Short Track

 

[nuerphil]

This is the thread I looked for! In the next weeks I´ll create a video tutorial how to use it and how to get better by comparing laptimes! I probably will use the 370z on Stowe to help new GT Academy candidates and I´ll try to transfer what I learned

 

[Noname0529]

This is the thread I looked for! In the next weeks I´ll create a video tutorial how to use it and how to get better by comparing laptimes! I probably will use the 370z on Stowe to help new GT Academy candidates and I´ll try to transfer what I learned

That fantastic!👍
I look forward to seeing the video!

 

[YZF]

As we were discussing high speed acceleration analysis and issues in this thread, I made new (interesting) test regarding top speed issue in GT6. I don't want to duplicate, so I'll just provide the link

 

[ALB123]

It's funny. I created another thread that provided a link to a magazine article written in 2003 that showed a hot lap around Nordschleife in a BMW M3 and the article provided an overhead view of the entire track spread across dozens of pages and it showed the driving line, braking points and exactly which gear the driver was in and where gear changes took place.

For kicks, I bought a 2004 BMW M3 and downgraded the tires to CS from SH and took it for a rip around Nordschleife in stock form - no practice laps. I wasn't looking to set any records. I wanted to drive fast, but clean and realistically - no 45 degree slides around corners with the tires screaming like theyre about to explode. Wouldn't you know that the driver in the magazine posted an 8 min 22 second lap time and my hand to god, I posted an 8 min 22 second lap time?! The gear changes match up remarkably well - although I tended to hold 5th gear longer and/or not even get into 6th gear on a few occasions that the BMW Test Driver did enter 6th gear.

I provided my MoTeC Track Report that shows which gear I was in and what spots on the track (I hid the speeds as that wasn't pertinent to my objective) in that thread. My point is, while Gran Turismo gets a lot of things wrong - I don't think anyone would say they don't - they do tend to get a lot of things right. I was blown away at how close our laps matched up.

 

[LeoStrop]

I just started using this toll this week, what an amazing feature. Overlaying laps and changing the graph from time to distance, shows you exactly what you are doing right, or wrong.

I don't think people are giving enough credits for this, even without the suspension data, you can read your lap in different ways and overcome its flaws. Looking forward for more testing, please keep this post updated with new discoveries and tips, thanks!