Inertial instrument system for aerial surveying:
Gespeichert in:
| Beteilige Person: | |
|---|---|
| Format: | Buch |
| Sprache: | Nichtbestimmte Sprache |
| Veröffentlicht: |
Washington
US Gov. Print. Off.
1987
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| Schriftenreihe: | United States Geological Survey: Geological Survey professional paper
1390 |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000446061&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Umfang: | IX, 103 S. |
Internformat
MARC
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| 100 | 1 | |a Brown, Russell H. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Inertial instrument system for aerial surveying |
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Datensatz im Suchindex
| _version_ | 1819250362496843776 |
|---|---|
| adam_text | Inertial Instrument System for
Aerial Surveying v
By RUSSELL H BROWN, with contributions by WILLIAM H CHAPMAN,
WILLIAM F HANNA, CHARLES E MONGAN, U S Geological Survey, and
JOHN W HURSH, The Charles Stark Draper Laboratory, Inc
USGEOLOGICALSURVEYPROFESSIONALPAPER1390
Eigeottaio^
Geol -Palaont Institut
; Fraiajcfur-t a M
•
UNITEDSTATESGOVERNMENTPRINTINGOFFICE,WASHINGTON:1987
CONTENTS
Page
Foreword iii
Preface v
Commonly used inch-pound terms and their
preferred SI equivalents - - ix
List of abbreviations - ix
Abstract 1
Introduction 2
Developmental incentives - 2
Developmental strategy - 2
Developmental history 3
Acknowledgments 6
Instrument system 7
Overall system concept 7
Inertial navigator 8
Inertial measurement unit 9
Gyroscopes - 10
Accelerometers 15
Gimbal system - 19
Resolvers 19
Feedback loops - 23
Electronics - - 24
Temperature control 25
Performance dynamics 27
External measurement requirement 35
Laser tracker --- 36
Computer 4G
Physical attributes - 47
Subsystems and data interfaces 50
Page
Computer—Continued
Peripheral devices 53
Software 54
Laser profiler 66
Color television camera 73
Special role of gravity 74
Aircraft for deployment of the instrument system 76
Operation of the instrument system 77
Ground control 79
Flight planning 81
Flight mission 83
Maintenance and service - 84
Postflight data processing 84
Performance-evaluation flights 85
Overall objectives 85
Calibration range 85
Specified flights 87
Flight results - 89
Flights 1 and 2 89
Flights 3 and 4 89
Uses for the instrument system 91
Hydrologic studies 91
Map production tasks 92
Geologic studies - 93
Future improvements in the instrument system 93
Selected references 95
Symbols and dimensions 96
Index - - 98
ILLUSTRATIONS
Page
FIGURE 1 Fiscal year history of work on U S Geological Survey contract by Draper Laboratory, Cambridge, Mass , 1975-81 - -- 5
2 Frequency response characteristics of inertial navigator and tracker to vehicle motion 8
3 Schematic of gyro and gimbal-support structure 10
4 Schematic of single-degree-of-freedom gyro - 11
5 Photograph showing the single-degree-of-freedom floated gyro - 13
6 Schematic of gyro and accelerometer arrays for aerial profiling of terrain system 15
7 Schematics of acceleration-measuring devices --- 16
8 Schematic view of the single-axis pendulous integrating gyro accelerometer - 17
9 Photograph showing the pendulous integrating gyro accelerometer 18
10 Schematic of support structure for inertial measurement unit 20
11 Resolver schematic and nomenclature - - 21
12 Photograph showing disassembled multispeed resolver for gimbal-support structure 22
13 Schematized feedback loops - 23
14 Schematic diagram of electrical circuits for stabilization subsystem of inertial measurement unit 25
15 Thermal control schematic for inertial measurement unit 26
16 Support and thermal control structure for inertial measurement unit 28
17 Orientation of locally level three-coordinate reference scheme at selected points on an idealized ellipsoidal Earth — 30
18 Schematic of support structure for inertial measurement unit and tracker : 37
19 Photograph showing the inertial measurement unit, laser tracker, gimbal-support structure, and housing 39
20 Optical layout for laser tracker - - 40
21 Analysis of the range equation for the laser tracker 42
22 Principal reference frequencies used in the aerial profiling of terrain system 44
23 Cone-shaped air space within which the tracker can see a retroreflector target 45
24 Photograph showing principal components and final assembly of the U S Geological Survey-designed retroreflector - 46
25 Functional structure of the aerial profiling of terrain system computer with connections to subsystems and
peripheral devices --- 47
26 Photograph showing the packaged flight computer for the aerial profiling of terrain system 49
27 Photograph showing the operator s keyboard and plasma display terminal for the aerial profiling of terrain system - 52
28 Photograph showing the line printer for the aerial profiling of terrain system - 53
29 Photograph showing the magnetic tape controller for the aerial profiling of terrain system - 54
30 Photograph showing the magnetic tape recorder for the aerial profiling of terrain system 55
31 Hypothetical sequence of the aerial profiling of terrain system modes for a flight mission 56
32 Structure graph of the master operating program for the aerial profiling of terrain system 61
INSTRUMENT SYST EM FOR AERIAL SURVEYING
Page
33 Recurrence intervals and callup sequence for the live synchronous tasks in the aerial profiling of terrain system 66
34 Data flow for the STARTUP AND TES T mode of the software for the aerial profiling of terrain system 67
35 Data flow for the CALIBRATE AND ALINE and STANDBY modes of the software for the aerial profiling of
terrain system - - 68
36 Data flow for the four flight modes of the software for the aerial profiling of terrain system 69
37 Photograph showing basic chassis with optics and some electronics for the laser profiler 71
38 Analysis of the range equation for the laser profiler - 72
39 Photograph showing color television camera for the aerial profiling of terrain system 74
40 Photograph showing video recorder and control box for the aerial profiling of terrain system 75
41 Photograph showing time-date and time-code ge nerators for the aerial profiling of terrain system 76
42 Photograph showing DeHavilland Twin Otter aircraft - - 79
43 Arrangement of aerial profiling of terrain system components in DeHavilland Twin Otter aircraft 80
44 Flight-path layout for profiling the Farmington River flood plain near Avon, Conn 82
45 Information flow through postmission data-processing software 84
46 Control diagram and retroreflector sites for cali bration range - - 86
47 Flight plan for performance-evaluation flights 1 and 2 88
48 Flight plan for performance-evaluation flight 3-- 88
49 Flight plan for performance-evaluation flight 4 88
TABLES
Page
TABLE 1 Package size and power requirements for the aerial profiling of terrain system computer and peripherals 48
2 Computer-action summary for the 14 special tasks in the aerial profiling of terrain system --- 62
3 Factors bearing upon aircraft selection 77
4 Performance characteristics, DeHavilland Twin Otter aircraft 78
5 Position coordinates and gravity values for retroreflector sites in the calibration range - 87
6 Results of performance-evaluation flights 1 and 2 90
7 Results of performance-evaluation flights 3 and 4 91
|
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| publishDate | 1987 |
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| series | United States Geological Survey: Geological Survey professional paper |
| series2 | United States Geological Survey: Geological Survey professional paper |
| spellingShingle | Brown, Russell H. Inertial instrument system for aerial surveying United States Geological Survey: Geological Survey professional paper Luftbild (DE-588)4036546-3 gnd |
| subject_GND | (DE-588)4036546-3 |
| title | Inertial instrument system for aerial surveying |
| title_auth | Inertial instrument system for aerial surveying |
| title_exact_search | Inertial instrument system for aerial surveying |
| title_full | Inertial instrument system for aerial surveying |
| title_fullStr | Inertial instrument system for aerial surveying |
| title_full_unstemmed | Inertial instrument system for aerial surveying |
| title_short | Inertial instrument system for aerial surveying |
| title_sort | inertial instrument system for aerial surveying |
| topic | Luftbild (DE-588)4036546-3 gnd |
| topic_facet | Luftbild Trägheitsnavigationssystem |
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