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
Method for selective deposition of a semiconductor material
Instance management of code in a database
Transmission apparatus, receiving apparatus, method, and storage medium
Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication
Cell reselection and handover with multimedia broadcast/multicast service
Automatically capturing images that include lightning
Context data in UPNP service information
  Randomly Featured Patents
Distributed resource managing system, distributed resource managing method, and distributed resource managing program
Fuel injector retention clip
Treatment of pain, fever, and inflammation with compositions containing 2-(substitutedpiperidinomethyl)propane and propene nitriles
Rebar securing device
Diagnostic medical ultrasound image and system for contrast agent imaging
Fluxmeter including squid and pickup coil with flux guiding core and method for sensing degree of deterioration of an object
Method of promoting bone growth by an anti-activin B antibody
Process for the production of substituted pyridine (B)
Planetary gear mechanism