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Old 10-04-2012, 07:52 PM   #81
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Old 10-05-2012, 09:26 AM   #82
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Quote:
Originally Posted by cychotic View Post
Heh, Controls terms. Should have thrown in some nyquist and routh hurwitz theorems.

For ABS to work properly in offroad condition, more types of sensor are required, probably accelerametor and shock pressure sensor should be enough. That run away effect is not surprising to me if the only sensor applied to the calculation was angular rotation between the two wheels. That's probably enough for a flat and consistant surface. But without extra sensors, there is no way to tell the different between a lifted wheel and a skidding wheel. With the addition of accelerometer and shock pressure sensor, you have enough information to determine the static friction of the surface...

But, I have no clue what that bike used. If they had all these sensories and still failed, then those engineer should be fired...
Lol... I think I still have a few Eigen Values left on my right half S-plane from all them Controls courses.

Right up until the recent introduction of TC on production motorcycles, ABS really only has the two wheel speeds to work with. Often times though, simple actually works better. A SISO (Single Input Single Output) system can be easy to control and to keep stable. Start adding in more I/O's and the transfer matrix gets complicated real fast. I believe TC usually adds a bank angle sensor and maybe accel's, but I'm not sure if those signals are used in the ABS part of the control algorithm.
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Old 10-05-2012, 09:34 AM   #83
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Old 10-05-2012, 09:35 AM   #84
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Originally Posted by spartandude View Post
2003 and they were still controlling DPP with a dude/dudette watching a gauge and pushing buttons/rotating nobs? Wow. This does bring back nightmares from that controls course.

Back on topic: my next bike will have ABS as all of my crashes have been from locking the front brake.
In may ways, oilfield moves very slowly. Old technologies are still being used today, even though better systems have been introduced and operating for a while. There have been several subsequent "improvement" patents since I wrote that original one. Companies do that to extend the protection of their patents.

Yes, I would much rather have ABS than not.
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Old 10-05-2012, 09:40 AM   #85
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You're gonna have to get on your bike and prove it to me
The best way is to experience it yourself. Find your a bumpy gravel road, preferrable on an downhill slope. Hit it with your CBR with some speed and grab a handful of brake, and see what the C-ABS does.

You might be pleasantly surprised.
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Old 10-05-2012, 10:21 AM   #86
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Quote:
Originally Posted by Volfy View Post
The best way is to experience it yourself. Find your a bumpy gravel road, preferrable on an downhill slope. Hit it with your CBR with some speed and grab a handful of brake, and see what the C-ABS does.

You might be pleasantly surprised.
Done, like a bauce. Brakes worked fine, now it's your turn
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Old 10-05-2012, 11:04 AM   #87
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Quote:
Originally Posted by Bevo View Post
Done, like a bauce. Brakes worked fine, now it's your turn
Uh huh... yes, I'm sure you did. You are a better man than I, then. Care to share the helmet cam video?
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Old 10-05-2012, 03:15 PM   #88
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Originally Posted by Volfy View Post
Care to share the helmet cam video?
Can I borrow yours?
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Old 10-05-2012, 04:04 PM   #89
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I don't have one, but shoot... if you would let me camcorder you flying down this supposed bumpy gravel downhill dirt road fast enough to engage the ABS, I will go buy a GoPro just to record the run on your head.

Might wanna upgrade your comprehensive before hand though.
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Old 10-05-2012, 05:45 PM   #90
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Quote:
Originally Posted by Volfy View Post
I don't have one, but shoot... if you would let me camcorder you flying down this supposed bumpy gravel downhill dirt road fast enough to engage the ABS, I will go buy a GoPro just to record the run on your head.

Might wanna upgrade your comprehensive before hand though.
You don't have to go fast for the ABS to kick in, you can't lock the wheels at any speed
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Old 10-05-2012, 08:24 PM   #91
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Quote:
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ABS should be standard on all motorcycles but should also include an option to switch it off if you wish.
i concur with this
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Old 10-06-2012, 12:43 PM   #92
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check out this video, skip to the 6:40 mark..... testing abs and tc on a 2012 s1000rr

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Old 10-06-2012, 12:48 PM   #93
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you might also want to consider tc:

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Old 10-06-2012, 01:10 PM   #94
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