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Groups > sci.physics > #510061 > unrolled thread
| Started by | Jackpol11@hotmail.com |
|---|---|
| First post | 2015-07-28 16:41 -0400 |
| Last post | 2015-08-03 17:57 +0000 |
| Articles | 20 on this page of 81 — 12 participants |
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Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-07-28 16:41 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-01 12:32 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-02 15:51 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-02 20:29 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-03 01:12 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-03 00:07 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-03 12:17 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-03 09:36 -0700
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-03 19:00 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Bohuš Matuška <bohu@paranetnet.net> - 2015-08-03 18:01 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-03 20:31 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Bohuš Matuška <bohu@paranetnet.net> - 2015-08-03 19:28 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-03 18:01 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-03 14:52 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-03 23:00 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-06 10:36 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-07 07:58 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-07 08:35 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-07 10:13 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-08 00:26 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-07 22:25 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-08 07:14 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-08 05:44 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Emmerich Schultheiß <emme@noemail.thx> - 2015-08-08 13:23 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-08 10:16 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-08 10:34 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-09 10:47 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-09 17:09 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Emmerich Schultheiß <emme@noemail.thx> - 2015-08-09 17:24 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-09 17:56 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-09 20:05 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-09 18:44 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Emmerich Schultheiß <emme@noemail.thx> - 2015-08-09 19:08 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-10 10:49 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-09 19:53 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-09 18:47 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-09 17:52 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-10 00:07 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-09 22:33 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-09 22:55 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-09 22:58 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-10 10:54 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-10 17:38 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-10 18:07 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-11 01:11 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-10 23:28 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-09 20:43 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-10 10:55 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-10 11:01 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-10 09:32 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-10 17:42 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-11 11:38 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-11 23:00 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-11 22:27 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-11 22:12 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Tom Roberts <tjroberts137@sbcglobal.net> - 2015-08-12 23:32 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-13 07:32 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 07:30 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Mahipal <mahipal7638@gmail.com> - 2015-08-13 05:50 -0700
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-13 13:11 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 08:23 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-13 13:28 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-13 15:20 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-13 13:22 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 07:24 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-13 15:10 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Felipe Delgado <fd@spreadspectrum.org> - 2015-08-13 13:15 +0000
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <Poutnik4NNTP@gmail.com> - 2015-08-13 15:21 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-13 16:26 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 16:35 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-13 21:52 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Odd Bodkin <bodkinodd@gmail.com> - 2015-08-14 07:42 -0500
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-14 14:04 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System dsr@mail.lns.cornell.edu (Daniel S. Riley) - 2015-08-13 12:27 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-11 22:20 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-09 11:39 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-09 12:42 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-11 14:40 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Poutnik <poutnik4nntp@gmail.com> - 2015-08-11 22:35 +0200
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System Jackpol11@hotmail.com - 2015-08-12 21:56 -0400
Re: Sensors in Motion Launches MEMS-Based Inertial Nav System jimp@specsol.spam.sux.com - 2015-08-03 17:57 +0000
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| From | Felipe Delgado <fd@spreadspectrum.org> |
|---|---|
| Date | 2015-08-09 22:58 +0000 |
| Message-ID | <mq8lvd$fgg$1@speranza.aioe.org> |
| In reply to | #512221 |
> Dne 09/08/2015 v 23:52 Jackpol11@hotmail.com napsal(a): > >> What we have in an inertial guidance system is the purest example of >> analog computation, a topic with which you are probably not >> experienced, >> because you keep groping for these 9 direction cosines that you can >> stuff into a digital computer. Actually cosines are not used, but arctangent > Why do you think trigonometric functions are not involved in analogue > systems ? They are, and even better than in digital ones, > as they are analogue continuous functions. > > You would know it, if you were more experienced in analogue systems... > :-P Me neither. How would you do calculations in "analogue systems"? What other systems out there?
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| From | Poutnik <Poutnik4NNTP@gmail.com> |
|---|---|
| Date | 2015-08-10 10:54 +0200 |
| Message-ID | <mq9ooo$j14$1@dont-email.me> |
| In reply to | #512241 |
On 08/10/2015 12:58 AM, Felipe Delgado wrote: >> Dne 09/08/2015 v 23:52 Jackpol11@hotmail.com napsal(a): >> > >> Why do you think trigonometric functions are not involved in analogue >> systems ? They are, and even better than in digital ones, >> as they are analogue continuous functions. >> >> You would know it, if you were more experienced in analogue systems... >> :-P > > Me neither. How would you do calculations in "analogue systems"? What > other systems out there? > Who spoke about calculations ? they are not needed. Do you really think that e.g. the radio receiver antenne calculates anything regarding its angle wrt to radio EM wave propagation ? -- Poutnik ( the Czech word for a wanderer )
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-08-10 17:38 +0000 |
| Message-ID | <u44n9c-u0k.ln1@mail.specsol.com> |
| In reply to | #512355 |
In sci.physics Poutnik <Poutnik4NNTP@gmail.com> wrote: > On 08/10/2015 12:58 AM, Felipe Delgado wrote: >>> Dne 09/08/2015 v 23:52 Jackpol11@hotmail.com napsal(a): >>> >> >>> Why do you think trigonometric functions are not involved in analogue >>> systems ? They are, and even better than in digital ones, >>> as they are analogue continuous functions. >>> >>> You would know it, if you were more experienced in analogue systems... >>> :-P >> >> Me neither. How would you do calculations in "analogue systems"? What >> other systems out there? >> > > Who spoke about calculations ? they are not needed. If you are talking about inertial navigation systems, you certainly need to do a lot of calculations somehow. > Do you really think that > e.g. the radio receiver antenne calculates anything > regarding its angle wrt to radio EM wave propagation ? Irrelevant. -- Jim Pennino
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| From | Felipe Delgado <fd@spreadspectrum.org> |
|---|---|
| Date | 2015-08-10 18:07 +0000 |
| Message-ID | <mqap9c$54o$1@speranza.aioe.org> |
| In reply to | #512441 |
jimp wrote: >>>> You would know it, if you were more experienced in analogue >>>> systems... >>>> :-P >>> >>> Me neither. How would you do calculations in "analogue systems"? What >>> other systems out there? >>> >>> >> Who spoke about calculations ? they are not needed. > > If you are talking about inertial navigation systems, you certainly need > to do a lot of calculations somehow. He won't need, he is an impertinent know-nothing idiot. A cretin.
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| From | Poutnik <poutnik4nntp@gmail.com> |
|---|---|
| Date | 2015-08-11 01:11 +0200 |
| Message-ID | <mqbav5$oa6$1@dont-email.me> |
| In reply to | #512450 |
Dne 10/08/2015 v 20:07 Felipe Delgado napsal(a): > jimp wrote: > >>>>> You would know it, if you were more experienced in analogue >>>>> systems... >>>>> :-P >>>> >>>> Me neither. How would you do calculations in "analogue systems"? What >>>> other systems out there? >>>> >>> Who spoke about calculations ? they are not needed. >> >> If you are talking about inertial navigation systems, you certainly need >> to do a lot of calculations somehow. > > He won't need, he is an impertinent know-nothing idiot. A cretin. > Intelligence of people is best observed in way how they speak about others. BTW, there was an era of analogue computers. -- Poutnik ( the Czech word for a wanderer )
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-08-10 23:28 +0000 |
| Message-ID | <plon9c-mdm.ln1@mail.specsol.com> |
| In reply to | #512580 |
In sci.physics Poutnik <poutnik4nntp@gmail.com> wrote: > Dne 10/08/2015 v 20:07 Felipe Delgado napsal(a): >> jimp wrote: >> >>>>>> You would know it, if you were more experienced in analogue >>>>>> systems... >>>>>> :-P >>>>> >>>>> Me neither. How would you do calculations in "analogue systems"? What >>>>> other systems out there? >>>>> >>>> Who spoke about calculations ? they are not needed. >>> >>> If you are talking about inertial navigation systems, you certainly need >>> to do a lot of calculations somehow. >> >> He won't need, he is an impertinent know-nothing idiot. A cretin. >> > > Intelligence of people is best observed in way > how they speak about others. > > BTW, there was an era of analogue computers. No shit; that era being roughly 100 BC until the end of the 20th Century. Did you just learn that from a web search? Would it surprise you to learn analog computers are still used in some applications? -- Jim Pennino
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| From | Jackpol11@hotmail.com |
|---|---|
| Date | 2015-08-09 20:43 -0400 |
| Message-ID | <bpsfsat6604dduda952ug3b228m03k61m4@4ax.com> |
| In reply to | #512221 |
On Mon, 10 Aug 2015 00:07:19 +0200, Poutnik <poutnik4nntp@gmail.com> wrote: >Dne 09/08/2015 v 23:52 Jackpol11@hotmail.com napsal(a): > >> What we have in an inertial guidance system is the purest example of >> analog computation, a topic with which you are probably not >> experienced, because you keep groping for these 9 direction cosines >> that you can stuff into a digital computer. > >Why do you think trigonometric functions >are not involved in analogue systems ? >They are, and even better than in digital ones, >as they are analogue continuous functions. > >You would know it, if you were more experienced >in analogue systems... :-P I think my work here is done. John Polasek
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| From | Poutnik <Poutnik4NNTP@gmail.com> |
|---|---|
| Date | 2015-08-10 10:55 +0200 |
| Message-ID | <mq9orp$j14$2@dont-email.me> |
| In reply to | #512286 |
On 08/10/2015 02:43 AM, Jackpol11@hotmail.com wrote: >> >> Why do you think trigonometric functions >> are not involved in analogue systems ? >> They are, and even better than in digital ones, >> as they are analogue continuous functions. >> >> You would know it, if you were more experienced >> in analogue systems... :-P > I think my work here is done. > John Polasek Here maybe, but add the reference for your wikipedia article modification. -- Poutnik ( the Czech word for a wanderer )
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| From | Poutnik <Poutnik4NNTP@gmail.com> |
|---|---|
| Date | 2015-08-10 11:01 +0200 |
| Message-ID | <mq9p6s$kl0$1@dont-email.me> |
| In reply to | #512286 |
On 08/10/2015 02:43 AM, Jackpol11@hotmail.com wrote: >> >> Why do you think trigonometric functions >> are not involved in analogue systems ? >> They are, and even better than in digital ones, >> as they are analogue continuous functions. >> > I think my work here is done. > John Polasek I hope not. Do not get me wrong, John ( you would be Jan Polášek here ). I fully respect your big experience with gyroscope systems. I just wanted to point out that not all is like them today, in both high and low ends..... -- Poutnik ( the Czech word for a wanderer )
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| From | Jackpol11@hotmail.com |
|---|---|
| Date | 2015-08-10 09:32 -0400 |
| Message-ID | <3u9hsa94c0m1gmq4git934d559kp0v5638@4ax.com> |
| In reply to | #512357 |
On Mon, 10 Aug 2015 11:01:50 +0200, Poutnik <Poutnik4NNTP@gmail.com> wrote: >On 08/10/2015 02:43 AM, Jackpol11@hotmail.com wrote: >>> >>> Why do you think trigonometric functions >>> are not involved in analogue systems ? >>> They are, and even better than in digital ones, >>> as they are analogue continuous functions. >>> > >> I think my work here is done. >> John Polasek > >I hope not. > >Do not get me wrong, John ( you would be Jan Polášek here ). > >I fully respect your big experience with gyroscope systems. > >I just wanted to point out that not all >is like them today, in both high and low ends..... To je leps^i, synko! John Polasek
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-08-10 17:42 +0000 |
| Message-ID | <gc4n9c-u0k.ln1@mail.specsol.com> |
| In reply to | #512357 |
In sci.physics Poutnik <Poutnik4NNTP@gmail.com> wrote: > On 08/10/2015 02:43 AM, Jackpol11@hotmail.com wrote: >>> >>> Why do you think trigonometric functions >>> are not involved in analogue systems ? >>> They are, and even better than in digital ones, >>> as they are analogue continuous functions. >>> > >> I think my work here is done. >> John Polasek > > I hope not. > > Do not get me wrong, John ( you would be Jan Polášek here ). > > I fully respect your big experience with gyroscope systems. > > I just wanted to point out that not all > is like them today, in both high and low ends..... The underlying physics and mathematics is independant of the hardware implementation. -- Jim Pennino
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| From | Jackpol11@hotmail.com |
|---|---|
| Date | 2015-08-11 11:38 -0400 |
| Message-ID | <dj5ksap8amodp05bens76j9bb3so90nfbl@4ax.com> |
| In reply to | #512357 |
On Mon, 10 Aug 2015 11:01:50 +0200, Poutnik <Poutnik4NNTP@gmail.com> wrote: >On 08/10/2015 02:43 AM, Jackpol11@hotmail.com wrote: >>> >>> Why do you think trigonometric functions >>> are not involved in analogue systems ? >>> They are, and even better than in digital ones, >>> as they are analogue continuous functions. >>> > >> I think my work here is done. >> John Polasek > >I hope not. > >Do not get me wrong, John ( you would be Jan Polášek here ). > >I fully respect your big experience with gyroscope systems. > >I just wanted to point out that not all >is like them today, in both high and low ends..... That reminds me of the time (1972?) I was hired by a company to digitize their analog aircraft something simulator. There was a very large schematic with op-amp integrators (they may have used homemade op-amps). There were about a half-dozen resolvers and the guy explained to me they didn't know what to do with them. So I figured out the proper matrix equations for each resolver that could then be used in the digital version. But, notice, the thing was working before I wrote any equations. Just put a resolver wherever there's an axle that turns and the job is done. The originating resolver forms a magnetic vector V, from the inputs X and Y (like you would do with a straight edge on paper) and that same magnetic V is properly dissected by the secondary coils into the 2 true geometric components in the next coordinates set offset by that angle. (redundancy noted) John Polasek
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| From | Poutnik <poutnik4nntp@gmail.com> |
|---|---|
| Date | 2015-08-11 23:00 +0200 |
| Message-ID | <mqdnmp$9ut$1@dont-email.me> |
| In reply to | #512715 |
Dne 11/08/2015 v 17:38 Jackpol11@hotmail.com napsal(a): > That reminds me of the time (1972?) I was hired by a company to > digitize their analog aircraft something simulator. There was a very > large schematic with op-amp integrators (they may have used homemade > op-amps). There were about a half-dozen resolvers and the guy > explained to me they didn't know what to do with them. > So I figured out the proper matrix equations for each resolver that > could then be used in the digital version. > But, notice, the thing was working before I wrote any equations. Just > put a resolver wherever there's an axle that turns and the job is > done. > The originating resolver forms a magnetic vector V, from the inputs X > and Y (like you would do with a straight edge on paper) and that same > magnetic V is properly dissected by the secondary coils into the 2 > true geometric components in the next coordinates set offset by that > angle. > (redundancy noted) > John Polasek > I was 7 years old than.. http://www.ibiblio.org/kuphaldt/electricCircuits/AC/02253.png What I previously wanted to point out was, that resolver is an elementary segment of eventually more complex analog computer. It produces at stator coils voltage proportional to sinus, resp. cosinus of the angle, that can be processed by other analog modules. I think there could be previously misunderstanding that I was going to work with cosines in digital computer. I remember early 80s when I was on technical high school and 2 of our enthusiastic professors presented to our class a working analog computer: 2 big boxes, full of connectors and cables, with few osciloscope or TV screens. Wit op amps, some basic operations can be easily achieved. -- Poutnik ( the Czech word for a wanderer )
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-08-11 22:27 +0000 |
| Message-ID | <re9q9c-hr2.ln1@mail.specsol.com> |
| In reply to | #512843 |
In sci.physics Poutnik <poutnik4nntp@gmail.com> wrote: > Dne 11/08/2015 v 17:38 Jackpol11@hotmail.com napsal(a): > >> That reminds me of the time (1972?) I was hired by a company to >> digitize their analog aircraft something simulator. There was a very >> large schematic with op-amp integrators (they may have used homemade >> op-amps). There were about a half-dozen resolvers and the guy >> explained to me they didn't know what to do with them. >> So I figured out the proper matrix equations for each resolver that >> could then be used in the digital version. >> But, notice, the thing was working before I wrote any equations. Just >> put a resolver wherever there's an axle that turns and the job is >> done. >> The originating resolver forms a magnetic vector V, from the inputs X >> and Y (like you would do with a straight edge on paper) and that same >> magnetic V is properly dissected by the secondary coils into the 2 >> true geometric components in the next coordinates set offset by that >> angle. >> (redundancy noted) >> John Polasek >> > I was 7 years old than.. > > http://www.ibiblio.org/kuphaldt/electricCircuits/AC/02253.png > > What I previously wanted to point out was, > that resolver is an elementary segment > of eventually more complex analog computer. Maybe or maybe doing something else such as generating a radar PPI display. > It produces at stator coils > voltage proportional to sinus, resp. cosinus of the angle, > that can be processed by other analog modules. If you have sinus issues, try an antihistamine; no idea what to do for a cosinus issue. > I think there could be previously misunderstanding > that I was going to work with cosines in digital computer. > > I remember early 80s when I was on technical high school > and 2 of our enthusiastic professors > presented to our class a working analog computer: > 2 big boxes, full of connectors and cables, > with few osciloscope or TV screens. > > Wit op amps, some basic operations can be easily achieved. I remember the mid 60's when I was introduced to the Nike-Hercules fire control computer that solved the differential intercept equations in real time. It had 78 tube based op amps and used motor driven zero set switches, AKA chopper stabilizers, to eliminate drift. -- Jim Pennino
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| From | Jackpol11@hotmail.com |
|---|---|
| Date | 2015-08-11 22:12 -0400 |
| Message-ID | <fi9lsa595l8cs1gqfqf163ilppsjttg08b@4ax.com> |
| In reply to | #512863 |
On Tue, 11 Aug 2015 22:27:07 -0000, jimp@specsol.spam.sux.com wrote: >In sci.physics Poutnik <poutnik4nntp@gmail.com> wrote: >> Dne 11/08/2015 v 17:38 Jackpol11@hotmail.com napsal(a): >> >>> That reminds me of the time (1972?) I was hired by a company to >>> digitize their analog aircraft something simulator. There was a very >>> large schematic with op-amp integrators (they may have used homemade >>> op-amps). There were about a half-dozen resolvers and the guy >>> explained to me they didn't know what to do with them. >>> So I figured out the proper matrix equations for each resolver that >>> could then be used in the digital version. >>> But, notice, the thing was working before I wrote any equations. Just >>> put a resolver wherever there's an axle that turns and the job is >>> done. >>> The originating resolver forms a magnetic vector V, from the inputs X >>> and Y (like you would do with a straight edge on paper) and that same >>> magnetic V is properly dissected by the secondary coils into the 2 >>> true geometric components in the next coordinates set offset by that >>> angle. >>> (redundancy noted) >>> John Polasek >>> >> I was 7 years old than.. >> >> http://www.ibiblio.org/kuphaldt/electricCircuits/AC/02253.png >> >> What I previously wanted to point out was, >> that resolver is an elementary segment >> of eventually more complex analog computer. > >Maybe or maybe doing something else such as generating a radar PPI >display. > >> It produces at stator coils >> voltage proportional to sinus, resp. cosinus of the angle, >> that can be processed by other analog modules. > >If you have sinus issues, try an antihistamine; no idea what to do >for a cosinus issue. > >> I think there could be previously misunderstanding >> that I was going to work with cosines in digital computer. >> >> I remember early 80s when I was on technical high school >> and 2 of our enthusiastic professors >> presented to our class a working analog computer: >> 2 big boxes, full of connectors and cables, >> with few osciloscope or TV screens. >> >> Wit op amps, some basic operations can be easily achieved. > >I remember the mid 60's when I was introduced to the Nike-Hercules >fire control computer that solved the differential intercept equations >in real time. > >It had 78 tube based op amps and used motor driven zero set switches, >AKA chopper stabilizers, to eliminate drift. These inertial guidance systems I worked on, all of the signals were 400 cycle AC which had to be rectified before integrating, then possibly re-modulated for further use. The synchros and resolvers required 400 cps. With this frequency less iron was required in the transformers, but higher frequencies would be bothered by the capacitance of the coils, approaching self resonance. These inertial guidancesystems went into ICBMs that stood vertically with the inertial platform on top. To align the platform into the plane of the target, a theodolite beam was sent up to a Porro prism and adjustments were made. This prism is sensitive only on one axis. I was given the task ofcalculating the azimuth errors resulting from tilts on the pitch and roll axes (which were supposedly neutralized out). As a result I finally wrote a complicated paper in the Journal of the Optical Society JOSA October 1967 "Matrix analysis of gimbaled mirror and prism systems)". (For $45 you can get a copy.) That is certainly one of the drawbacks of the "peer-reviewed" system. Essentially nobody gets to see it. John Polasek
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| From | Tom Roberts <tjroberts137@sbcglobal.net> |
|---|---|
| Date | 2015-08-12 23:32 -0500 |
| Message-ID | <mJWdnTxGBs1MgFHInZ2dnUU7_8ydnZ2d@giganews.com> |
| In reply to | #512902 |
[I just happened to see this.] On 8/11/15 8/11/15 9:12 PM, Jackpol11@hotmail.com wrote: > As a result I finally wrote a complicated paper in the Journal of the > Optical Society JOSA October 1967 "Matrix analysis of gimbaled mirror > and prism systems)". (For $45 you can get a copy.) > That is certainly one of the drawbacks of the "peer-reviewed" system. > Essentially nobody gets to see it. That is OUTRAGEOUSLY wrong. Anybody who is interested can see it at an appropriate library or by paying the fee. For instance, I could obtain a copy by simply requesting one from the librarian (email request, PDF returned, usually same day), or by walking down to the library and finding it on the shelf (yes they scan old articles like this). What you mean is that essentially no AMATEURS get to see it. Professionals will always find it, because we know that reading a technical article is VASTLY better than trying to re-construct the concepts, calculations, and measurements on our own. Hmmm. That's not quite right, either. What you really mean is that essentially no STUPID amateurs get to see it. (Neither do uninterested people, but that doesn't matter.) Tom Roberts
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| From | Poutnik <poutnik4nntp@gmail.com> |
|---|---|
| Date | 2015-08-13 07:32 +0200 |
| Message-ID | <mqha1t$8d7$1@dont-email.me> |
| In reply to | #513183 |
Dne 13/08/2015 v 06:32 Tom Roberts napsal(a): > [I just happened to see this.] > > On 8/11/15 8/11/15 9:12 PM, Jackpol11@hotmail.com wrote: >> As a result I finally wrote a complicated paper in the Journal of the >> Optical Society JOSA October 1967 "Matrix analysis of gimbaled mirror >> and prism systems)". (For $45 you can get a copy.) >> That is certainly one of the drawbacks of the "peer-reviewed" system. >> Essentially nobody gets to see it. > > That is OUTRAGEOUSLY wrong. Anybody who is interested can see it at an > appropriate library or by paying the fee. For instance, I could obtain a copy by > simply requesting one from the librarian (email request, PDF returned, usually > same day), or by walking down to the library and finding it on the shelf (yes > they scan old articles like this). > > What you mean is that essentially no AMATEURS get to see it. Professionals will > always find it, because we know that reading a technical article is VASTLY > better than trying to re-construct the concepts, calculations, and measurements > on our own. > > Hmmm. That's not quite right, either. What you really mean is that essentially > no STUPID amateurs get to see it. (Neither do uninterested people, but that > doesn't matter.) > > Paying the fee is not optimal option for physics hobbyists, if price per article is higher than for most books. Asking for free, availability may vary for world regions. Libraries may not be subscribers, or librarians may not be willing to provide such a service. Also, hobbyists a/o older people may not be familiar with library systems. Stupid is rather strong word here. -- Poutnik ( the Czech word for a wanderer )
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| From | Odd Bodkin <bodkinodd@gmail.com> |
|---|---|
| Date | 2015-08-13 07:30 -0500 |
| Message-ID | <mqi2lg$7m6$1@speranza.aioe.org> |
| In reply to | #513190 |
On 8/13/2015 12:32 AM, Poutnik wrote: > Paying the fee is not optimal option for physics hobbyists, > if price per article is higher than for most books. > > Asking for free, availability may vary for world regions. > > Libraries may not be subscribers, > or librarians may not be willing to provide such a service. > > Also, hobbyists a/o older people > may not be familiar with library systems. > > Stupid is rather strong word here. > I wouldn't use "stupid". I would use a combination of "lazy" and "disinterested". Several of our chronic posters live very near a university with a well-equipped library, but they gag when it's suggested that they go look something up. Excuses abound. But what's interesting is that the excuses are not of the form, "It's too far away" or "I don't have transportation" or "I don't know how to look it up once I get there." The excuses are "Books are full of lies," or "Anything that is worth anything should be explainable in a couple of paragraphs and not require wading through hundreds of pages," or "Books are passe, the internet is in," or "I'm too old to spend time reading," or "There are no such books, and I'd waste my time going to the library to look for nonexistent books." -- Odd Bodkin --- maker of fine toys, tools, tables
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| From | Mahipal <mahipal7638@gmail.com> |
|---|---|
| Date | 2015-08-13 05:50 -0700 |
| Message-ID | <8c91a1aa-dd74-4e8e-aaa9-6453a577de58@googlegroups.com> |
| In reply to | #513229 |
On Thursday, August 13, 2015 at 8:30:45 AM UTC-4, Odd Bodkin wrote: > On 8/13/2015 12:32 AM, Poutnik wrote: > > Paying the fee is not optimal option for physics hobbyists, > > if price per article is higher than for most books. > > > > Asking for free, availability may vary for world regions. > > > > Libraries may not be subscribers, > > or librarians may not be willing to provide such a service. > > > > Also, hobbyists a/o older people > > may not be familiar with library systems. > > > > Stupid is rather strong word here. > > > > I wouldn't use "stupid". I would use a combination of "lazy" and > "disinterested". Several of our chronic posters live very near a > university with a well-equipped library, but they gag when it's > suggested that they go look something up. Excuses abound. But what's > interesting is that the excuses are not of the form, "It's too far away" > or "I don't have transportation" or "I don't know how to look it up once > I get there." The excuses are "Books are full of lies," or "Anything > that is worth anything should be explainable in a couple of paragraphs > and not require wading through hundreds of pages," or "Books are passe, > the internet is in," or "I'm too old to spend time reading," or "There > are no such books, and I'd waste my time going to the library to look > for nonexistent books." > > -- > Odd Bodkin --- maker of fine toys, tools, tables To summarize, Potluck and Odd, really stupidly don't care for old peeps. Paying for internet access -- Usenet or otherwise -- is not cheaping out. I've been to many a library, the worthwhile books are either checked out or are out of print. Wonder why? Every fucking book should be sold in electronic form! O wait... they are?! How come nobody ever tells me anything before my mouth opens?! Shakespeare is so old, audience chants: you know how old he is?, that every word of his is freely available on Project Gutenberg. Sure, some other great authors are there too. Blah blah BLAH... Next, if something so important is worth the hauling our wheelchairs to the library for, then why pray tell, is it not on any website? -- Mahipal 'If it is true and so very important, it must be hidden...'
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| From | Felipe Delgado <fd@spreadspectrum.org> |
|---|---|
| Date | 2015-08-13 13:11 +0000 |
| Message-ID | <mqi52f$d8e$1@speranza.aioe.org> |
| In reply to | #513229 |
Odd Bodkin wrote: > On 8/13/2015 12:32 AM, Poutnik wrote: >> Paying the fee is not optimal option for physics hobbyists, >> if price per article is higher than for most books. >> >> Asking for free, availability may vary for world regions. >> >> Libraries may not be subscribers, >> or librarians may not be willing to provide such a service. >> >> Also, hobbyists a/o older people >> may not be familiar with library systems. >> >> Stupid is rather strong word here. >> > > I wouldn't use "stupid". I would use a combination of "lazy" and > "disinterested". Several of our chronic posters live very near a No please, "stupid" is ok.
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