Patents by Inventor Tom Michael Richard Ernest Roberts

Tom Michael Richard Ernest Roberts 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).

  • Compensation for motor inertia in electric power assisted steering systems
    Patent number: 6597136
    Abstract: An electric power assisted steering system of the kind in which an electric motor is operatively connected to a steering assembly through a gearbox to apply an assistance torque to the steering assembly and in which the steering assembly includes a steering column coupled at one end to a driver's handwheel and at the other end to steerable wheels, a means being provided for generating a signal representative of the velocity of rotation of the steering column. The system includes a high pass filter which is adapted to generate, for frequencies below a prescribed threshold, a signal at least approximately proportional to steering column acceleration and representative of the inertia of the rotor of the electric motor, the latter signal being arranged to be used to compensate for the motor rotor inertia in an overall assistance torque demand as developed by the system.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: July 22, 2003
    Assignee: TRW LucasVarity Electric Steering Ltd.
    Inventors: Anthony Walter Burton, Simon David Stevens, Russell Wilson Jones, Marie Saunier, Tom Michael Richard Ernest Roberts
  • Compensation for motor inertia in electric power assisted steering systems
    Publication number: 20020125845
    Abstract: An electric power assisted steering system of the kind in which an electric motor is operatively connected to a steering assembly through a gearbox to apply an assistance torque to the steering assembly and in which the steering assembly includes a steering column coupled at one end to a driver's handwheel and at the other end to steerable wheels, a means being provided for generating a signal representative of the velocity of rotation of the steering column. The system includes a high pass filter which is adapted to generate, for frequencies below a prescribed threshold, a signal at least approximately proportional to steering column acceleration and representative of the inertia of the rotor of the electric motor, the latter signal being arranged to be used to compensate for the motor rotor inertia in an overall assistance torque demand as developed by the system.
    Type: Application
    Filed: November 15, 2001
    Publication date: September 12, 2002
    Applicant: TRW LucasVarity Electric Steering Limited
    Inventors: Anthony Walter Burton, Simon David Stevens, Russell Wilson Jones, Marie Saunier, Tom Michael Richard Ernest Roberts