The increases in size and mechanical complexity of spacecraft result in increased complexity of the mathematical model which describes the spacecraft dynamics. The results in turn in increased computational effort, in increased difficulties in understanding the characteristics of the spacecraft dynamics, and in increased difficulties in the design as well as the implementation of algorithms suitable for the control of the motion of the spacecraft. Reduction of the mathematical order of the open loop spacecraft dynamics model with minimal loss of model accuracy is therefore paramount importance. Literature contains descriptions of a large number of approach towards open loop model order reduction. The report describes five basic approaches that have been identified. These are: (i) parameter optimization; (ii) aggregation; (iii) singular perturbation; (iv) modal dominance; and (v) component cost analysis. Each of the five approaches mentioned is described and commented upon, related approaches are discussed, and applications are described.
Dynamics of Flexible Spacecraft: An Analysis of Approaches toward Mathematical Model Order Reduction
1985
203 pages
Report
No indication
English