Spacecraft momentum unloading - The cell mapping approach
| Autor: | Henryk Flashner, T. F. Burns |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Physics
Angular momentum Momentum (technical analysis) Spacecraft business.industry Applied Mathematics Aerospace Engineering Cell mapping ComputerApplications_COMPUTERSINOTHERSYSTEMS Optimal control Magnetorquer Momentum Classical mechanics Space and Planetary Science Control and Systems Engineering Control theory Bounded function Orbit (dynamics) State-transition equation Electrical and Electronic Engineering business |
| Zdroj: | Guidance, Navigation and Control Conference. |
| DOI: | 10.2514/6.1988-4131 |
| Popis: | An approach for developing spacecraft angular momentum unloading control algorithms based on the cell mapping formulation is presented. Representations of periodic dynamic systems in terms of point mappings are discussed and their discretizations to form cell mappings derived. An optimal control technique exploiting the cell approach is presented and applied to the problem of momentum unloading. A number of unloading schemes by means of magnetic torquers are derived using this cell state space optimal control approach. The unloading schemes entail off-line control sequence generation, enabling the attitude control system to achieve unloading by a table lookup of magnetic torquer settings once per orbit. Simulation study results for two model spacecraft in low Earth orbit indicate closely bounded momentum performance from the control laws developed by the proposed approach. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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