Patents by Inventor Gerhard Johan Wierda

Gerhard Johan Wierda 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).

  • Patent number: 6028409
    Abstract: Remote control system comprising two circuits each containing an actuator acting on a mass and controlled by an actuator signal, a manual control means coupled to said actuator, a force transducer measuring the force applied to said manual control means, a velocity transducer measuring the velocity of the manual control means, a control circuit representing a model of the dynamics of a moving mass the input signal of which is divided by a simulated mass to obtain a commanded acceleration signal, which is time integrated to obtain a commanded velocity signal, an actuator controller the input signal of which is the balance between the commanded velocity signal and the velocity of the manual control means. The balance of the two measured forces is applied as input signal to both circuits.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: February 22, 2000
    Assignee: Fokker Control Systems B.V.
    Inventor: Gerhard Johan Wierda