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
Remote tracing of software on an avionic device
Method for cutting the lower and at least one upper thread and a method for lead-in stitching as well as a device for implementing the method
Crunching dynamically generated script files
Three-dimensional image editing device and three-dimensional image editing method
Linear motion guide unit with long-lasting lubricating system
System and method for cooling a nozzle
System for sensing the position of a movable bar
  Randomly Featured Patents
Pivotal lever-type connector
Process for the preparation of polyterephthaloyl-and polydiphenyl ether-4,4-dicarboxylic acid oxalamidrazone
Lock mounting system
Liquid crystal display element
Method and apparatus for multi-planar radiation emission for imaging
Process for the manufacture of peptides containing cystine
Hardware system verification environment tool
Methine and azamethine dyes based on trifluoromethylpyridones
Method of and arrangement for determining loading capacity of coating elements for structures