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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Papadopoulos, P.M. Laub, A.J. Kenney, C.S. Pandey, P. Ianculescu, G. Ly, J. |
| Copyright Year | 1991 |
| Description | Author affiliation: ECE Dept., California Univ., Santa Barbara, CA, USA (Papadopoulos, P.M.; Laub, A.J.; Kenney, C.S.; Pandey, P.) |
| Abstract | The authors present the design of an optimal control system for the Space Station Freedom solar dynamic fine pointing and tracking (SDFPT) module. A very large state model of six rigid modes and 272 flexible modes is used in conjunction with classical LQG optimal control to produce a full-order controller which satisfies the requirements. The results obtained are compared with those of a classically designed PID (proportional plus integral plus derivative) controller that was implemented for a six-rigid-body-mode forty-flexible-mode model. A major difficulty with designing LQG controllers for large models is solving the Ricati equation that arises from the optimal formulation. A Riccati solver based on a Pade approximation to the matrix sign function is used. A symmetric version of this algorithm is derived for the special class of Hamiltonian matrices, thereby yielding, for large problems, a nearly twofold speed increase over a previous algorithm.< |
| Starting Page | 2224 |
| Ending Page | 2229 |
| File Size | 427845 |
| Page Count | 6 |
| File Format | |
| ISBN | 0780304500 |
| DOI | 10.1109/CDC.1991.261542 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1991-12-11 |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Optimal control Space stations Riccati equations Symmetric matrices Power system modeling Three-term control PD control Pi control Proportional control Integral equations |
| Content Type | Text |
| Resource Type | Article |
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