Patents by Inventor David P. Hong

David P. Hong 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).

  • Noise screen for attitude control system
    Patent number: 6477450
    Abstract: An attitude control system comprising a controller and a noise screen device coupled to the controller. The controller is adapted to control an attitude of a vehicle carrying an actuator system that is adapted to pulse in metered bursts in order to generate a control torque to control the attitude of the vehicle in response to a control pulse. The noise screen device is adapted to generate a noise screen signal in response to the control pulse that is generated when an input attitude error signal exceeds a predetermined deadband attitude level. The noise screen signal comprises a decaying offset signal that when combined with the attitude error input signal results in a net attitude error input signal away from the predetermined deadband level to reduce further control pulse generation.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: November 5, 2002
    Assignee: Space Systems/Loral, Inc.
    Inventors: John J. Rodden, Homer D. Stevens, David P. Hong, Philip C. Hirschberg
  • NOISE SCREEN FOR ATTITUDE CONTROL SYSTEM
    Publication number: 20020111722
    Abstract: An attitude control system comprising a controller and a noise screen device coupled to the controller. The controller is adapted to control an attitude of a vehicle carrying an actuator system that is adapted to pulse in metered bursts in order to generate a control torque to control the attitude of the vehicle in response to a control pulse. The noise screen device is adapted to generate a noise screen signal in response to the control pulse that is generated when an input attitude error signal exceeds a predetermined deadband attitude level. The noise screen signal comprises a decaying offset signal that when combined with the attitude error input signal results in a net attitude error input signal away from the predetermined deadband level to reduce further control pulse generation.
    Type: Application
    Filed: February 13, 2001
    Publication date: August 15, 2002
    Inventors: John J. Rodden, Homer D. Stevens, David P. Hong, Philip C. Hirschberg