Pointing control for LDR
- Yam, Y.
- Aug 15, 1988.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Briggs, C.
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
- One important aspect of the LDR control problem is the possible excitations of structural modes due to random disturbances, mirror chopping, and slewing maneuvers. An analysis was performed to yield a first order estimate of the effects of such dynamic excitations. The analysis involved a study of slewing jitters, chopping jitters, disturbance responses, and pointing errors, making use of a simplified planar LDR model which describes the LDR dynamics on a plane perpendicular to the primary reflector. Briefly, the results indicate that the command slewing profile plays an important role in minimizing the resultant jitter, even to a level acceptable without any control action. An optimal profile should therefore be studied.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19900004137.
Accession ID: 90N13453.
Report of the Asilomar 3 LDR Workshop; p 54-55.
- No Copyright.
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