Patents by Inventor Ali Hasan Nayfeh

Ali Hasan Nayfeh 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).

  • Methods and Systems for Detection Using Threshold-Type Electrostatic Sensors
    Publication number: 20100321027
    Abstract: Methods, apparatus and systems are described as relating to electrostatic sensors for detection in micro or nano electromechanical systems. In exemplary embodiments, a sensor for detecting a threshold value of is provided. The sensor includes a deformable member with a mass detection area, an electrostatic actuator having first and second plates, the first plate being connected to the mass detection area, and a voltage source connected to each of the first and second plate. The operating voltage being proximate to a local bifurcation point of the electrostatic sensor for the first and second plates to pull-in together. Upon an external mass having the threshold value appearing on the mass detection area, the local bifurcation point of the electrostatic sensor is shifted such that the first and second plates will pull in to contact each other by movement of the deformable member to signal detection.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 23, 2010
    Inventors: Mahmoud Elsayed Khater, Eihab Mohamed Abdel-Rahman, Ali Hasan Nayfeh
  • Nonlinear active control of dynamical systems
    Patent number: 7044314
    Abstract: A control system for reducing cargo pendulation. The control system calculates a correction factor and adds the correction factor for the operator input motions in addition to the motion of the platform in order to provide a reference position of the suspension point of the hoisting cable. The reference position is then provided to a tracking controller so that the crane can be forced to track the needed motions for reducing the cargo pendulation.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: May 16, 2006
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Ali Hasan Nayfeh, Dean Trischler Mook, Ryan James Henry, Zivad Navif Masoud
  • Nonlinear active control of dynamical systems
    Publication number: 20040073343
    Abstract: A control system for reducing cargo pendulation. The control system calculates a correction factor and adds the correction factor for the operator input motions in addition to the motion of the platform in order to provide a reference position of the suspension point of the hoisting cable. The reference position is then provided to a tracking controller so that the crane can be forced to track the needed motions for reducing the cargo pendulation.
    Type: Application
    Filed: October 6, 2003
    Publication date: April 15, 2004
    Inventors: Ali Hasan Nayfeh, Dean Trischler Mook, Ryan James Henry, Zivad Navif Masoud
  • Nonlinear active control of dynamical systems
    Patent number: 6631300
    Abstract: A control system for reducing cargo pendulation. The control system calculates a correction factor and adds the correction factor for the operator input motions in addition to the motion of the platform in order to provide a reference position of the suspension point of the hoisting cable. The reference position is then provided to a tracking controller so that the crane can be forced to track the needed motions for reducing the cargo pendulation.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: October 7, 2003
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Ali Hasan Nayfeh, Dean Tritschler Mook, Ryan James Henry, Ziyad Nayif Masoud