Method and system for determining a singularity free momentum path
US7464899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2005 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Nov 28, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64G1/286
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for avoiding singularities in the movement of CMGs in an array of CMGs in a spacecraft includes a first step where a maneuver command to rotate a spacecraft orientation is received. Then, the torque needed to rotate the spacecraft's orientation is determined. Then, the torque is integrated to determine a momentum path. The momentum path is decomposed into a sequence of straight line segments. For each line segment, a unit vector along the straight line segments is determined. Then, it is determined if there is a continuous path connecting a start point and an end point of the line segment in a plane perpendicular to the unit vector. For each point along the path in the plane perpendicular to the unit vector, a set of gimbal angles is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.