Method for attitude controlling based on finite time friction estimation for flexible spacecraft
US9663252B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2016 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Dec 7, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F15/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method for attitude control based on finite time friction estimation for a flexible spacecraft. The control method includes the following steps: a. introducing spacecraft flywheel friction disturbance into a spacecraft dynamics system, and establishing a flexible spacecraft dynamics system with flywheel friction disturbance; b. converting the flexible spacecraft dynamics system with flywheel friction disturbance into a state-space form; c. constructing a flywheel friction disturbance estimator; d. constructing a flexible appendage vibration disturbance observer; and e. combining the flywheel friction disturbance estimator in the step c and the flexible appendage vibration disturbance observer in the step d with a nominal controller to obtain a compound controller; the compound controller compensating for flywheel friction according to an estimated value of a flywheel friction moment; and the compound controller compensating for flexible appendage vibration disturbance according to an estimated value of flexible appendage vibration disturbance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.