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Modeling SMAP Spacecraft Attitude Control Estimation Error Using Signal Generation ModelTwo ground simulation software are used to model the SMAP spacecraft dynamics. The CAST software uses a higher fidelity model than the ADAMS software. The ADAMS software models the spacecraft plant, controller and actuator models, and assumes a perfect sensor and estimator model. In this simulation study, the spacecraft dynamics results from the ADAMS software are used as CAST software is unavailable. The main source of spacecraft dynamics error in the higher fidelity CAST software is due to the estimation error. A signal generation model is developed to capture the effect of this estimation error in the overall spacecraft dynamics. Then, this signal generation model is included in the ADAMS software spacecraft dynamics estimate such that the results are similar to CAST. This signal generation model has similar characteristics mean, variance and power spectral density as the true CAST estimation error. In this way, ADAMS software can still be used while capturing the higher fidelity spacecraft dynamics modeling from CAST software.
Document ID
Document Type
Conference Paper
External Source(s)
Rizvi, Farheen (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 1, 2017
Publication Date
January 4, 2016
Subject Category
Spacecraft Design, Testing and Performance
Computer Programming and Software
Meeting Information
AIAA SciTech 2016(San Diego, CA)
Distribution Limits
Soil Moisture Active Passive