Resources Contact Us Home
Satellite harmonic torque estimator

Image Number 9 for United States Patent #6672544.

A spacecraft embedded in a reference frame rotating relative to inertial space. The spacecraft generally includes actuators for maneuvering the spacecraft with respect to the reference frame, an attitude measurement device that measures the pitch and roll attitude of the spacecraft with respect to the reference frame, a control device adapted to keep the roll and pitch angles of the spacecraft close to the commanded roll and pitch angles, and a harmonic torque estimator adapted to read the commanded angular velocity of the spacecraft relative to an inertial frame, read momentum wheel speeds, read known predicted external torques and combine angular velocity, measured wheel speed and known external torque to produce an estimated observable periodic torque.

  Recently Added Patents
Sensor apparatus and information processing apparatus
Process for the preparation of morphinane analogues
Systems, methods and computer program products supporting provision of web services using IMS
Motor drive component verification system and method
Compositions and methods for lowering triglycerides in a subject on concomitant statin therapy
Monitoring cloud-runtime operations
Automated tuning in a virtual machine computing environment
  Randomly Featured Patents
Method of producing a liquid ejection head
Flexible pouch
Thin-film magnetic head with heating means for adjusting magnetic spacing
Motor controlling method and apparatus
Scalable multiparty conferencing and collaboration system and method of dynamically allocating system resources and providing true color support in same
Cryogenic refrigeration system
Self administrable anti-fertility composition
Process for forming polyesters
Mixed composition interface layer and method of forming
Backlighting device