Patents by Inventor SIMON E. ZIMMERMAN

SIMON E. ZIMMERMAN 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 estimating road surface friction
    Patent number: 10131360
    Abstract: Methods and systems are provided for determining a road surface friction coefficient and controlling a feature of the vehicle based thereon. In one embodiment, a method includes: receiving signals from an electronic power steering system and an inertial measurement unit; estimating parameters associated with an electronic power steering system model using an iterative optimization method; calculating an electronic power steering system variable using the electronic power steering system model, the estimated parameters and one or more of the received signals; determining whether the calculated electronic power steering system variable satisfies a fitness criterion; and when the calculated electronic power steering system variable does satisfy the fitness criterion, determining a road surface friction coefficient based on at least one of the estimated parameters.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: November 20, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yadollah Sabri, Simon E. Zimmerman, Yingmei Si, Steven T. Schweitzer, Qingrong Zhao, Qi Zhang, Nikolai K. Moshchuk
  • METHODS AND SYSTEMS FOR ESTIMATING ROAD SURFACE FRICTION
    Publication number: 20180043900
    Abstract: Methods and systems are provided for determining a road surface friction coefficient and controlling a feature of the vehicle based thereon. In one embodiment, a method includes: receiving signals from an electronic power steering system and an inertial measurement unit; estimating parameters associated with an electronic power steering system model using an iterative optimization method; calculating an electronic power steering system variable using the electronic power steering system model, the estimated parameters and one or more of the received signals; determining whether the calculated electronic power steering system variable satisfies a fitness criterion; and when the calculated electronic power steering system variable does satisfy the fitness criterion, determining a road surface friction coefficient based on at least one of the estimated parameters.
    Type: Application
    Filed: August 12, 2016
    Publication date: February 15, 2018
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: YADOLLAH SABRI, SIMON E. ZIMMERMAN, YINGMEI SI, STEVEN T. SCHWEITZER, QINGRONG ZHAO, QI ZHANG, NIKOLAI K. MOSHCHUK