Subject:
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another comparison
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 20 Jan 2007 15:46:27 GMT
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Highlighted:
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(details)
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Viewed:
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2912 times
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We have compared the sampling and computing speed of NXT and RCX. NXT uses
standard firmware 1.03 and is programmed with the LabVIEW toolkit. RCX is
programmed with ULTIMATE ROBOLAB. Both bricks do the same thing: computing the
DFT on a small dataset of 128 points that are read from the legacy light-sensor
on a shaft encoder that is rotated with a legacy motor. ULTIMATE ROBOLAB keeps
the whole system running (managing sensors, sound, display, buttons,
IR-communication...) e.a. all the things that the standard firmware also is
doing; so there is no reduced funtionality and thus no tricky speed gain. Both
programs are absolutely comparable. But the RCX operates the sampling plus DFT
22.8 times faster than NXT! This is intriguing.
Would be nice to compare the speed features under other firmwares or programming
environments.
Beating the RCX is not that simple !
www.convict.lu/Jeunes/nxt_one/RFT_NXT_RCX.htm
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Message has 3 Replies:
 | | Re: another comparison
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| (...) I'd love to make some other comparisions; actually, some of us have been trying to figure out a good way to do this. Part of the problem is defineing specific "goals" for a battery of tests. A DFT (while impressive), is propably not the best (...) (17 years ago, 21-Jan-07, to lugnet.robotics)
| | | Re: another comparison
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| Hi Claude, (...) do you have the DFT algorithm in some programming language like Java or C? I'm just guessing, but maybe it could also be useful for speech recognition? Or maybe telling the cat from the dog? (The sound sensor should be usable as a (...) (17 years ago, 24-Jan-07, to lugnet.robotics)
| | | Re: another comparison
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| (...) Now the new LabVIEW NXT tookit 2.0 that includes firmware 1.26 drastically beets the RCX performance ( (URL) ). We repeated the experiment and now the NXT runs the DFT much faster than the RCX with more features: power-spectrum (needs floating (...) (15 years ago, 20-Aug-09, to lugnet.robotics)
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