Competitive Times for Nationals

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Re: Competitive Times for Nationals

Postby cheese » May 9th, 2018, 7:34 pm

Idk rn about our BB.

We are at 4.53 seconds, with a consistent <4 cm away first run, and < 1cm away second. Any faster, we might have to compensate for skid.
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » May 9th, 2018, 7:59 pm

My partner and I are redoing some measurements, but we have a 3 second car and we average <7 cm 1st run, <=3 cm second. It isn't as consistent as we would like it to be after some unfortunate events but yea. Work in progress still, but we believe/hope we can cement it to <2 cm every time. How do you think scores like that would fare in competition?

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Re: Competitive Times for Nationals

Postby DarthBuilder » May 9th, 2018, 8:03 pm

shrewdPanther46 wrote:My partner and I are redoing some measurements, but we have a 3 second car and we average <7 cm 1st run, <=3 cm second. It isn't as consistent as we would like it to be after some unfortunate events but yea. Work in progress still, but we believe/hope we can cement it to <2 cm every time. How do you think scores like that would fare in competition?


I think that is top 12 for sure but I haven’t been keeping up with battery buggy as much. But it sounds pretty good. If you get it less than 1 cm I’m sure that may be a possible medal.
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Re: Competitive Times for Nationals

Postby hippo9 » May 9th, 2018, 8:52 pm

Yeah that should probably be top 15, and with some luck I think that could medal.
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Re: Competitive Times for Nationals

Postby M017 » May 9th, 2018, 10:16 pm

Based on predictions that under 5 cm is top 10 or 15, I've decided to test to get every 10cm mark within a half cm, and if it's in between take an average of the wingnut turns

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Re: Competitive Times for Nationals

Postby windu34 » May 10th, 2018, 7:09 am

M017 wrote:Based on predictions that under 5 cm is top 10 or 15, I've decided to test to get every 10cm mark within a half cm, and if it's in between take an average of the wingnut turns

You shouldnt need to test every 10cm mark. Every 50cm should be plenty sufficient and obtain you the same amount of accuracy by using a linear regression to find marks in between
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Re: Competitive Times for Nationals

Postby cheese » May 10th, 2018, 2:54 pm

windu34 wrote:
M017 wrote:Based on predictions that under 5 cm is top 10 or 15, I've decided to test to get every 10cm mark within a half cm, and if it's in between take an average of the wingnut turns

You shouldnt need to test every 10cm mark. Every 50cm should be plenty sufficient and obtain you the same amount of accuracy by using a linear regression to find marks in between

Yeah we do that, and then use siri to pick a random number between 900 and 1200 and do those just for practice.
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Re: Competitive Times for Nationals

Postby hippo9 » May 14th, 2018, 8:51 am

As long as, you can get to a few points consistently, a linear regression should be able to figure out the rest of the possible distances.
Also, asking siri is actually ingenious, even though it's hilarious at the same time.
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Re: Competitive Times for Nationals

Postby windu34 » May 14th, 2018, 8:55 am

hippo9 wrote:As long as, you can get to a few points consistently, a linear regression should be able to figure out the rest of the possible distances.
Also, asking siri is actually ingenious, even though it's hilarious at the same time.

While this is a cool idea, it is probably more beneficial to pick points yourself that you think your vehicle may struggle with. I always picked a close point (9.0-9.3m) and a far point (11.7-12.0m) whenever I finished implementing something new on my device because if the device performs well at the extremes, it will perform well in the middle and this method saves a lot more time
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » May 14th, 2018, 4:36 pm

yea that same 30 cm interval at each extreme is kinda sketchy for us even w/our current car :?
the closer one gives us more consistency issues than the farther one. The farther one is more an issue w/alignment (we dont use a rifle scope, we just line up some stuff)

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Re: Competitive Times for Nationals

Postby windu34 » May 14th, 2018, 5:31 pm

shrewdPanther46 wrote:yea that same 30 cm interval at each extreme is kinda sketchy for us even w/our current car :?
the closer one gives us more consistency issues than the farther one. The farther one is more an issue w/alignment (we dont use a rifle scope, we just line up some stuff)

Well there's a problem. If you want to expect consistency from your device, you yourself better be consistent to start with. You really need to use an aiming system of some sort
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » May 14th, 2018, 5:35 pm

We do have one, and its generally within 1-2 cm left/right of the target point up to like 11.5 meters, but then things get worse from there

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Re: Competitive Times for Nationals

Postby cheese » May 14th, 2018, 5:46 pm

^ same. Weird thing happened today. Just doing practice tests and they all were variably off. Idk if it was a different floor or something but we haven't been this off in awhile. I guess going back to testing tomorrow.
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » May 14th, 2018, 5:54 pm

We were forced to finish testing last saturday because we had to pack stuff in the van to travel :/
We had a really long 5 hour session (which was cut short by the security guard lol) and we noticed something really weird with our alignment.

So for like the first couple hours everything was normal as to our calculations. But by the time the 5th hour came around, the car was randomly going on a much straighter trajectory than it was earlier, and we had to slightly adjust our angling, which was surprising. Idk if there is any causal relationship between the two, but its certainly a bit odd.

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Re: Competitive Times for Nationals

Postby hippo9 » May 15th, 2018, 6:37 am

It probably has to do with the alignment being slightly adjusted when testing that much, but it honestly could be a lot of things causing that.
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