Download Iram Document Template

IRAM
NCS Antenna Mount Drive Control
Change Record
REVISION
DATE
AUTHOR
SECTION/PAGE
AFFECTED
REMARKS
Content
1
Hardware description.....................................................................................3
2
Software development...................................................................................3
2.1
Servo controllers........................................................................................3
2.1.1
Basic controller ..........................................................................3
2.1.2
Cascade controller.....................................................................4
Servo implementation................................................................................7
2.2.1
Kernel module int_ant................................................................7
2.2.2
Initialization tasks.......................................................................9
2.2.3
Slow and periodic tasks...........................................................10
Observation commands...........................................................................11
2.3.1
source ......................................................................................11
2.3.2
sourceOffsets...........................................................................12
2.3.3
setNextSubscanTrack .............................................................12
2.3.4
setNextSubscanSlewAzimuth..................................................12
2.3.5
setNextSubscanSlewElevation................................................13
2.3.6
setNextSubscanOtf..................................................................13
2.3.7
setNextSegmentLinear ............................................................13
2.3.8
setNextSegmentCircle .............................................................14
2.3.9
setNextSegmentCurve ............................................................14
2.3.10
prepareObservation .................................................................14
2.3.11
startObservation ......................................................................15
2.3.12
haltObservation........................................................................15
2.3.13
setPointingParameters ............................................................15
2.2
2.3
3
Some Results................................................................................................17
3.1
Tracking in cascade mode.......................................................................17
3.1.1
Azimuth step from 220deg to 220.2deg in cascade mode ......17
3.1.2
Elevation step from 45deg to 45.2deg in cascade mode ........18
Create Date:November 2001
NCSControl.doc
Author: A.Perrigouard
Page 2 of 19