Patents by Inventor Allen J. Clark

Allen J. Clark 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).

  • Load dynamics compensation circuit for servohydraulic control systems
    Patent number: 4537077
    Abstract: A load dynamic compensation circuit for a servohydraulic control system for fixtures and specimens being tested operating in various degrees of freedom, for example in an environment to simulate earthquakes to test building specimens, or to provide road profile simulation for rail and automobile vehicles, or wind buffet loads for aircraft. A compensation circuitry compensates for specimen displacement disturbances in the control loop that are a function of the force exerted from the specimen and the acceleration of the test mass.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: August 27, 1985
    Assignee: MTS Systems Corporation
    Inventors: Allen J. Clark, Dale N. Maue