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
Weighted determination in configuration management systems
Signal processing device and method for providing oscillating signal in the signal processing device
Apparatus and method for image reconstruction and CT system
Query optimization with awareness of limited resource usage
Wafer recycling method
Methods and compositions to treat and detect misfolded-SOD1 mediated diseases
Methods, systems, and products for providing ring backs
  Randomly Featured Patents
Polymer solution
Apparatus and method for degrading a web in the machine direction while preserving cross-machine direction strength
Stabilizer link rod, and method of manufacturing same
Roller apparatus with magnetic induction heating arrangement
(6,7-)dihydro-(1,2,4) triazolo (1,5-A) (1,3,5) Triazine-2-sulphonamides, and their use as herbicides and plant growth regulators
Control decisions in a communication system
Vehicular room illuminating lamp
Fluid bearing
Glycodelin monoclonal antibodies and methods for their use in the detection of ovarian cancer