Synchronization of motor controller and PC system clocks
Identifieur interne :
000190 ( PascalFrancis/Curation );
précédent :
000189;
suivant :
000191
Synchronization of motor controller and PC system clocks
Auteurs : Frank Kittmann [
Allemagne] ;
Thomas Bertram [
Allemagne] ;
Florian Briegel [
Allemagne] ;
Lars Mohr [
Allemagne] ;
Jürgen Berwein [
Allemagne]
Source :
-
Proceedings of SPIE, the International Society for Optical Engineering [ 0277-786X ] ; 2010.
RBID : Pascal:11-0070238
Descripteurs français
- Pascal (Inist)
- Synchronisation,
Pilotage ordinateur,
Ethernet,
Télescope,
Miroir,
Système temporisé,
Timing,
Incertitude,
Système incertain,
Milliseconde,
..
English descriptors
Abstract
The power of the Large Binocular Telescope (LBT) with its two 8.4m primary mirrors sharing a common mount will unfold its full potential with the LINC-NIRVANA (LN) instrument. LINC-NIRVANA is a German-Italian beam combiner for the LBT and will interfere the light from the two 8.4m mirrors of the LBT in Fizeau mode. More than 140 motors have to be handled by custom developed Motor Controllers (MoCons). One important feature of the MoCon is the support of externally computed trajectories. Motion profiles provide information on the movement of the motor along a defined path over a certain period of time. Such profiles can be uploaded to the MoCon over Ethernet and can be started at a specific time. For field derotation it is critical that the derotation trajectories are executed with a very precise relative and absolute timing. This raises the problem of the synchronization of the MoCon internal clock with the system time of the servers that are hosting LINC-NIRVANA's Instrument Control Software. The MoCon time should be known by the servers with an uncertainty of few milliseconds in order to match the start time of the motion profile and the field rotation trajectory. In this paper we will discuss how to synchronize the MoCon internal time and the PC system time.
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| A08 | 01 | 1 | ENG | @1 Synchronization of motor controller and PC system clocks |
|---|
| A09 | 01 | 1 | ENG | @1 Software and cyberinfrastructure for astronomy : 27-30 June 2010, San Diego, California, United States |
|---|
| A11 | 01 | 1 | | @1 KITTMANN (Frank) |
|---|
| A11 | 02 | 1 | | @1 BERTRAM (Thomas) |
|---|
| A11 | 03 | 1 | | @1 BRIEGEL (Florian) |
|---|
| A11 | 04 | 1 | | @1 MOHR (Lars) |
|---|
| A11 | 05 | 1 | | @1 BERWEIN (Jürgen) |
|---|
| A12 | 01 | 1 | | @1 RADZIWILL (Nicole M.) @9 ed. |
|---|
| A12 | 02 | 1 | | @1 BRIDGER (Alan) @9 ed. |
|---|
| A14 | 01 | | | @1 Max-Planck-Institute, Königstuhl 17 @2 69117 Heidelberg @3 DEU @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut. |
|---|
| A14 | 02 | | | @1 I. Physics Institute, University of Cologne @2 50937 Cologne @3 DEU @Z 1 aut. |
|---|
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| A18 | 02 | 1 | | @1 American Astronomical Society @3 USA @9 org-cong. |
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| A21 | | | | @1 2010 |
|---|
| A23 | 01 | | | @0 ENG |
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| A25 | 01 | | | @1 SPIE @2 Bellingham, Wash. |
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| A44 | | | | @0 0000 @1 © 2011 INIST-CNRS. All rights reserved. |
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| C01 | 01 | | ENG | @0 The power of the Large Binocular Telescope (LBT) with its two 8.4m primary mirrors sharing a common mount will unfold its full potential with the LINC-NIRVANA (LN) instrument. LINC-NIRVANA is a German-Italian beam combiner for the LBT and will interfere the light from the two 8.4m mirrors of the LBT in Fizeau mode. More than 140 motors have to be handled by custom developed Motor Controllers (MoCons). One important feature of the MoCon is the support of externally computed trajectories. Motion profiles provide information on the movement of the motor along a defined path over a certain period of time. Such profiles can be uploaded to the MoCon over Ethernet and can be started at a specific time. For field derotation it is critical that the derotation trajectories are executed with a very precise relative and absolute timing. This raises the problem of the synchronization of the MoCon internal clock with the system time of the servers that are hosting LINC-NIRVANA's Instrument Control Software. The MoCon time should be known by the servers with an uncertainty of few milliseconds in order to match the start time of the motion profile and the field rotation trajectory. In this paper we will discuss how to synchronize the MoCon internal time and the PC system time. |
|---|
| C02 | 01 | 3 | | @0 001E03A55C |
|---|
| C03 | 01 | 3 | FRE | @0 Synchronisation @5 06 |
|---|
| C03 | 01 | 3 | ENG | @0 Synchronization @5 06 |
|---|
| C03 | 02 | X | FRE | @0 Pilotage ordinateur @5 18 |
|---|
| C03 | 02 | X | ENG | @0 Computer control @5 18 |
|---|
| C03 | 02 | X | SPA | @0 Control por ordenador @5 18 |
|---|
| C03 | 03 | X | FRE | @0 Ethernet @5 19 |
|---|
| C03 | 03 | X | ENG | @0 Ethernet @5 19 |
|---|
| C03 | 03 | X | SPA | @0 Ethernet @5 19 |
|---|
| C03 | 04 | 3 | FRE | @0 Télescope @5 20 |
|---|
| C03 | 04 | 3 | ENG | @0 Telescopes @5 20 |
|---|
| C03 | 05 | 3 | FRE | @0 Miroir @5 21 |
|---|
| C03 | 05 | 3 | ENG | @0 Mirrors @5 21 |
|---|
| C03 | 06 | X | FRE | @0 Système temporisé @5 22 |
|---|
| C03 | 06 | X | ENG | @0 Timed system @5 22 |
|---|
| C03 | 06 | X | SPA | @0 Sistema temporizado @5 22 |
|---|
| C03 | 07 | 3 | FRE | @0 Timing @5 23 |
|---|
| C03 | 07 | 3 | ENG | @0 Timing @5 23 |
|---|
| C03 | 08 | X | FRE | @0 Incertitude @5 24 |
|---|
| C03 | 08 | X | ENG | @0 Uncertainty @5 24 |
|---|
| C03 | 08 | X | SPA | @0 Incertidumbre @5 24 |
|---|
| C03 | 09 | 3 | FRE | @0 Système incertain @5 25 |
|---|
| C03 | 09 | 3 | ENG | @0 Uncertain systems @5 25 |
|---|
| C03 | 10 | X | FRE | @0 Milliseconde @5 26 |
|---|
| C03 | 10 | X | ENG | @0 Millisecond @5 26 |
|---|
| C03 | 10 | X | SPA | @0 Milisegundo @5 26 |
|---|
| C03 | 11 | 3 | FRE | @0 . @4 INC @5 82 |
|---|
| N21 | | | | @1 045 |
|---|
| N44 | 01 | | | @1 OTO |
|---|
| N82 | | | | @1 OTO |
|---|
|
|---|
| pR |
| A30 | 01 | 1 | ENG | @1 Software and cyberinfrastructure for astronomy @3 San Diego CA USA @4 2010 |
|---|
|
|---|
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Le document en format XML
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</keywords><front><div type="abstract" xml:lang="en">The power of the Large Binocular Telescope (LBT) with its two 8.4m primary mirrors sharing a common mount will unfold its full potential with the LINC-NIRVANA (LN) instrument. LINC-NIRVANA is a German-Italian beam combiner for the LBT and will interfere the light from the two 8.4m mirrors of the LBT in Fizeau mode. More than 140 motors have to be handled by custom developed Motor Controllers (MoCons). One important feature of the MoCon is the support of externally computed trajectories. Motion profiles provide information on the movement of the motor along a defined path over a certain period of time. Such profiles can be uploaded to the MoCon over Ethernet and can be started at a specific time. For field derotation it is critical that the derotation trajectories are executed with a very precise relative and absolute timing. This raises the problem of the synchronization of the MoCon internal clock with the system time of the servers that are hosting LINC-NIRVANA's Instrument Control Software. The MoCon time should be known by the servers with an uncertainty of few milliseconds in order to match the start time of the motion profile and the field rotation trajectory. In this paper we will discuss how to synchronize the MoCon internal time and the PC system time.</div>
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</fA66><fC01 i1="01" l="ENG"><s0>The power of the Large Binocular Telescope (LBT) with its two 8.4m primary mirrors sharing a common mount will unfold its full potential with the LINC-NIRVANA (LN) instrument. LINC-NIRVANA is a German-Italian beam combiner for the LBT and will interfere the light from the two 8.4m mirrors of the LBT in Fizeau mode. More than 140 motors have to be handled by custom developed Motor Controllers (MoCons). One important feature of the MoCon is the support of externally computed trajectories. Motion profiles provide information on the movement of the motor along a defined path over a certain period of time. Such profiles can be uploaded to the MoCon over Ethernet and can be started at a specific time. For field derotation it is critical that the derotation trajectories are executed with a very precise relative and absolute timing. This raises the problem of the synchronization of the MoCon internal clock with the system time of the servers that are hosting LINC-NIRVANA's Instrument Control Software. The MoCon time should be known by the servers with an uncertainty of few milliseconds in order to match the start time of the motion profile and the field rotation trajectory. In this paper we will discuss how to synchronize the MoCon internal time and the PC system time.</s0>
</fC01><fC02 i1="01" i2="3"><s0>001E03A55C</s0>
</fC02><fC03 i1="01" i2="3" l="FRE"><s0>Synchronisation</s0>
<s5>06</s5>
</fC03><fC03 i1="01" i2="3" l="ENG"><s0>Synchronization</s0>
<s5>06</s5>
</fC03><fC03 i1="02" i2="X" l="FRE"><s0>Pilotage ordinateur</s0>
<s5>18</s5>
</fC03><fC03 i1="02" i2="X" l="ENG"><s0>Computer control</s0>
<s5>18</s5>
</fC03><fC03 i1="02" i2="X" l="SPA"><s0>Control por ordenador</s0>
<s5>18</s5>
</fC03><fC03 i1="03" i2="X" l="FRE"><s0>Ethernet</s0>
<s5>19</s5>
</fC03><fC03 i1="03" i2="X" l="ENG"><s0>Ethernet</s0>
<s5>19</s5>
</fC03><fC03 i1="03" i2="X" l="SPA"><s0>Ethernet</s0>
<s5>19</s5>
</fC03><fC03 i1="04" i2="3" l="FRE"><s0>Télescope</s0>
<s5>20</s5>
</fC03><fC03 i1="04" i2="3" l="ENG"><s0>Telescopes</s0>
<s5>20</s5>
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<s5>21</s5>
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<s5>21</s5>
</fC03><fC03 i1="06" i2="X" l="FRE"><s0>Système temporisé</s0>
<s5>22</s5>
</fC03><fC03 i1="06" i2="X" l="ENG"><s0>Timed system</s0>
<s5>22</s5>
</fC03><fC03 i1="06" i2="X" l="SPA"><s0>Sistema temporizado</s0>
<s5>22</s5>
</fC03><fC03 i1="07" i2="3" l="FRE"><s0>Timing</s0>
<s5>23</s5>
</fC03><fC03 i1="07" i2="3" l="ENG"><s0>Timing</s0>
<s5>23</s5>
</fC03><fC03 i1="08" i2="X" l="FRE"><s0>Incertitude</s0>
<s5>24</s5>
</fC03><fC03 i1="08" i2="X" l="ENG"><s0>Uncertainty</s0>
<s5>24</s5>
</fC03><fC03 i1="08" i2="X" l="SPA"><s0>Incertidumbre</s0>
<s5>24</s5>
</fC03><fC03 i1="09" i2="3" l="FRE"><s0>Système incertain</s0>
<s5>25</s5>
</fC03><fC03 i1="09" i2="3" l="ENG"><s0>Uncertain systems</s0>
<s5>25</s5>
</fC03><fC03 i1="10" i2="X" l="FRE"><s0>Milliseconde</s0>
<s5>26</s5>
</fC03><fC03 i1="10" i2="X" l="ENG"><s0>Millisecond</s0>
<s5>26</s5>
</fC03><fC03 i1="10" i2="X" l="SPA"><s0>Milisegundo</s0>
<s5>26</s5>
</fC03><fC03 i1="11" i2="3" l="FRE"><s0>.</s0>
<s4>INC</s4>
<s5>82</s5>
</fC03><fN21><s1>045</s1>
</fN21><fN44 i1="01"><s1>OTO</s1>
</fN44><fN82><s1>OTO</s1>
</fN82><pR><fA30 i1="01" i2="1" l="ENG"><s1>Software and cyberinfrastructure for astronomy</s1>
<s3>San Diego CA USA</s3>
<s4>2010</s4>
</fA30>
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