Specifications

Doc Number: VIS-ANA-VER-01001-9002
Date: 27 May 2004
Issue: 5.0
Page: 4 of 80
Author: J. Delgadillo
Controls Preliminary Design Report Issue 5.doc
Table of Contents
1 INTRODUCTION..............................................................................................................................................6
2 ACRONYMS AND ABBREVIATIONS ........................................................................................................6
3 APPLICABLE AND REFERENCED DOCUMENTS................................................................................7
4 DESIGN REPORT.............................................................................................................................................8
4.1 SCOPE..........................................................................................................................................................8
4.2 DESIGN DESCRIPTION.................................................................................................................................8
4.2.1 Mount Control System Control Loops/Points of Control .................................................................16
4.2.2 MCS Performance Summary..............................................................................................................17
4.2.3 EU Electromagnetic and Safety Compatibility .................................................................................19
4.2.4 AZ/ALT Power Drive Unit..................................................................................................................21
4.2.4.1 AZ/ALT PDU Power Feeds..........................................................................................................21
4.2.4.2 AZ/ALT PDU Motor Controllers ..................................................................................................21
4.2.4.3 AZ/ALT PDU Lube System..........................................................................................................24
4.2.4.4 AZ/ALT PDU Status Board..........................................................................................................24
4.2.4.5 AZ/ALT Rate Loop Boards..........................................................................................................24
4.2.4.6 AZ/ALT Central Control Unit.......................................................................................................26
4.2.4.7 AZ/ALT Control Board ................................................................................................................27
4.2.4.8 AZ/ALT Interlocking...................................................................................................................28
4.2.4.9 Altitude Manual Drive System......................................................................................................29
4.2.4.10 Altitude Imbalance.......................................................................................................................30
4.2.4.11 AZ/ALT PDU EMC Treatments...................................................................................................30
4.2.4.12 AZ/ALT PDU Major Subassemblies.............................................................................................31
4.2.4.13 AZ/ALT LCU Interface ................................................................................................................31
4.2.5 CASS Power Drive Unit......................................................................................................................39
4.2.5.1 CASS PDU Motor Controllers ......................................................................................................39
4.2.5.2 CASS Cablewrap .........................................................................................................................39
4.2.5.3 CASS Interlocking.......................................................................................................................42
4.2.5.4 CASS PMU Control Logic ...........................................................................................................43
4.2.5.5 CASS Encoder Interface ...............................................................................................................43
4.2.5.6 CASS EMC Treatments................................................................................................................43
4.2.5.7 CASS Central Control Unit...........................................................................................................44
4.2.5.8 CASS Major Subassemblies .........................................................................................................45
4.2.5.9 CASS LCU Interface....................................................................................................................46
4.2.5.10 Regeneration Cabinet ...................................................................................................................48
4.2.5.11 Isolation Transformer...................................................................................................................49
4.2.5.12 Data Acquisition System ..............................................................................................................51
4.2.5.13 Optical Incremental Tape Encoder................................................................................................53
4.2.5.14 AZ, ALT and CASS Drive Motors and Brakes..............................................................................54
4.2.5.15 Mount Switches............................................................................................................................56
4.2.5.16 Anemometers...............................................................................................................................58
4.2.6 Material Parts .....................................................................................................................................59
4.2.7 Documentation ....................................................................................................................................59
4.2.8 Break-out Boxes ..................................................................................................................................59
4.3 TAPE ENCODER CALCULATIONS ..............................................................................................................60
4.3.1 Azimuth Tape Encoder Calculations .................................................................................................60
4.3.2 Altitude Tape Encoder Calculations ..................................................................................................60
4.3.3 Cassegrain Rotator Tape Encoder Calculations ..............................................................................61
4.4 CONCLUSIONS...........................................................................................................................................62