Patents by Inventor Arthur C. Or

Arthur C. Or has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Spacecraft off-gimbal IRU precision payload pointing and disturbance rejection system
    Patent number: 6897821
    Abstract: An off-gimbal pointing system is improved using filtering of resolver and gyro responses respectively applied at the output of the resolvers and gyros for attenuating high frequencies resolver responses and gyro responses that effectively degrades the high frequency responses that are matched and above the control system bandwidth for improving the overall dynamic control of the off-gimbal pointing system for rejecting the affects of base motion disturbances and vibrations.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: May 24, 2005
    Assignee: The Aerospace Corporation
    Inventors: Robert L. Wong, Jason H. Q. Ly, Philip R. Dahl, Arthur C. Or
  • Determining liquid fill fraction on a spacecraft
    Patent number: 5383359
    Abstract: A method and apparatus of determining the fill fraction of a liquid in a spacecraft in weightless space is disclosed. A small motion is introduced about the center of mass of the spacecraft undergoing steady spin and/or thrust, and resulting spacecraft oscillations are sensed. The measured frequency, amplitude and phase of the spacecraft oscillations are compared with counterpart values predicted for possible liquid quantities by a nonempirically computed model of spacecraft dynamics.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: January 24, 1995
    Assignee: Hughes Aircraft Company
    Inventors: A. Dorian Challoner, Arthur C. Or