Patents by Inventor John A.L. Shishido

John A.L. Shishido 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).

  • High-frequency, hexapod six degree-of-freedom shaker
    Patent number: 8453512
    Abstract: A shaker for enabling the testing of gyros and/or other devices for performance under realistic 6DOF motions. The shaker may be implemented as a hexapod, comprising a plate and six individually, simultaneously, and real-time controllable strut assemblies that are capable of extending and contracting linearly. The strut assemblies may comprise high-precision, linear electromagnetic actuators. The strut assemblies may also comprise high-precision non-contact sensors to sense the extension/contraction of the strut assemblies along their stroke length. In addition, the strut assemblies may comprise, at each end thereof, stiff, bendable flexures to attain the repeatable and linear motion required. The controller preferably has a control bandwidth of 1000 Hz or more, so that the motion of the plate can be precisely controlled to realize realistic 6DOF motions.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: June 4, 2013
    Assignee: The Aerospace Corporation
    Inventors: Felix T. Sasso, Walter H. Chung, John A. L. Shishido
  • High-frequency, hexapod six degree-of-freedom shaker
    Publication number: 20110308296
    Abstract: A shaker for enabling the testing of gyros and/or other devices for performance under realistic 6DOF motions. The shaker may be implemented as a hexapod, comprising a plate and six individually, simultaneously, and real-time controllable strut assemblies that are capable of extending and contracting linearly. The strut assemblies may comprise high-precision, linear electromagnetic actuators. The strut assemblies may also comprise high-precision non-contact sensors to sense the extension/contraction of the strut assemblies along their stroke length. In addition, the strut assemblies may comprise, at each end thereof, stiff, bendable flexures to attain the repeatable and linear motion required. The controller preferably has a control bandwidth of 1000 Hz or more, so that the motion of the plate can be precisely controlled to realize realistic 6DOF motions.
    Type: Application
    Filed: June 17, 2010
    Publication date: December 22, 2011
    Applicant: The Aerospace Corporation
    Inventors: Felix T. Sasso, Walter H. Chung, John A.L. Shishido