control-structure interaction/mirror motion compensation · nasa contractor report 189672 'a.,...
TRANSCRIPT
NASA Contractor Report 189672
'a.,
Control-Structure Interaction/Mirror
Motion Compensation
Mark McLaren, Peter Chu, and Xen Price
Space Systems / Loral
Palo Alto, Callfornla
Contract NAS l - 19242
September 1992 (HASA-CR-18o_72) CCNT_L-STR,JCTU pF
INTPRACTION/MIRRDR M_TIQN
C©HPEHSATICH rin_l neport (Soace
bys_ems) 13O p
_,, "), v,_-3_,l 5 3
_Jnc ! _s
National Aeronauli('s and
Space Adminislralion
Langley Research CenterHampton, Virginia 23665-5225
https://ntrs.nasa.gov/search.jsp?R=19920024909 2018-08-19T21:51:53+00:00Z
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REPORT DOCUMENTATION PAGE FormApprovedOMB No. 0704-0188
Public repollln 0 borden for this co_leclk_t of Information Is utlma, ted 1o average 1 hour per response. Including the time for reviewing Insffuclions. se._ching existing data sources.
gathering and maintaining the data needed, and completing and reviewing the o0nectlon of Intormalton. Send comments regarding this burden estimate Or any =her aspect of this
colfoc, C_n _ Infotmallon. Including sugge.qk)ns Io¢ redu(:_g thk_ burden, to Washington/k)adquaners Servtc,,as. Directorate tot Inlorrnallon Ol:_'alions and Reports. 1215 Jefferson Davis
Highway. Suite 1204, Arllngqon. VA 222024302. =u,.d to the Office of Man&0ement and Budget. Paperwork Reduction Project (0704-0188). Washington, DC 20503.
1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE 3. REPORTTYPE AND DATES COVERED
Scptcznbcr 1992 Contractor Reportw
4. TITLE AND SUBTITLE
Control-Structure Interaction/Mirror Motion Compensation
s. AUTHOR(S}
Mark McLaren, Peter Chu, Xen Price
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
Space Systems/Loral
3825 Fabian Way
Palo Alto, CA 94303
9. SI_NSORING I MONITORING AGENCY NAME(S) AND ADDRESS(ES)
National Aeronautics and Space Administration
Langley Research Center
Hampton, VA 23665-5225
5. FUNDING NUMBERS
C NAS1-19242
WU 590-14-41-01
8. PERFORMING ORGANIZATIONREPORT NUMBER
10. SPONSORING / MONITORINGAGENCY REPORT NUMBER
NASA CR-189672
11. SUPPLEMENTARY NOTES
Langley Technical Monitor - William L. Grantham
Fi._l Report, - 'l'_k l
12a. D_STRIBUTION1AVAILABILITY STATEMENT
Unclassified - Unlimited
Subject Category 18
I
i13. ABSTRACT (Maximum 200 words)
12b. DISTRIBUTION CODE
Space Systems/l_oral (formerly Ford Aerospace, Space Systems Division) has implemented a rigid-body Mirror Motion
Compensation (MMC) scheme for the GOES-I/M spacecraft currently being built for NASA and NOAh,. This has resulted in
a factor of 15 reduction in pointing error due to rigid-body spacecraft motion induced by the periodic black-body calibration
maneuvers required for the instruments. For GOES the spacecralt and the payload mirrors are considered as rigid bodies.
The structural flexibility effects are small and are included in the total pointing budget as a separate item.
This paper extends the MMC technique to include structural flexibility. For large multi-payload platforms, the structural
flexibility effects can be more important in sensor pointing jitter as the result of payload motion. Sensitivity results are
included to show the importance of the dynamic model fidelity.
I
114. SUBJECT TERMS
Spacecraft pointing jitter, Feed Forward Compensation, Precision Pointing
17.' SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATIONOF REPORT OF THIS PAGE
Unclassified Unclassified
NSN 7540-01-280-5500
19. SECURITY CLASSIFICATIONOF ABSTRACT
15. NUMBER OF PAGES
129
16. PRICE CODE
A07
20. MMITATION OF ABSTRACT
Standard Form 298 z39-(RevT'e2.,89)PrNcrbedbyANSISId.298.102