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
Flavonoid dimers and methods of making and using such
Electronic component, a semiconductor wafer and a method for producing an electronic component
Pixel structure of organic light emitting device
Apparatus and method for transmitting and receiving data
Adapter plate for use in mounting an audio/visual device or the like to a surface
Print processing method, print relay server, control method, and storage medium to reserve print data
  Randomly Featured Patents
Circulation-active 1,4-dihydropyridine derivatives and use thereas
Image encrypting device, image decrypting device and method
Cutting blade bending apparatus capable of precisely forming acute angle
Nitro group-containing naphthoquinone derivatives and photosensitive material using the same for electrophotography
Suturing apparatus
Evanescent mode band reject filters and related methods
Photocurable ink-jet ink, ink-jet image forming method and ink-jet recording apparatus using the same
Spindle with positive lock drawbar
Dispersant VI improver
Imidazoquinolone derivatives