公开(公告)号：US10131360B2

公开(公告)日：2018-11-20

申请号：US15236106

申请日：2016-08-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yadollah Sabri ,  Simon E. Zimmerman ,  Yingmei Si ,  Steven T. Schweitzer ,  Qingrong Zhao ,  Qi Zhang ,  Nikolai K. Moshchuk

IPC: B60W40/06 ,  B60W40/068 ,  B60W40/105 ,  B60W40/114 ,  B60W50/14 ,  G05D1/00

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.

公开(公告)号：US10272919B2

公开(公告)日：2019-04-30

申请号：US14510862

申请日：2014-10-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Youssef A. Ghoneim ,  Qingrong Zhao ,  Qi Zhang ,  Bakhtiar B. Litkouhi ,  Yingmei Si ,  David M. Sidlosky ,  Valarie V. Boatman ,  Sami Ahmed

IPC: B60W40/06 ,  B60W40/068

Abstract: Methods and systems for determining road surface information in a vehicle. In one embodiment, the method includes: determining at least one condition assessment value based on steering data; determining a feature set to include at least one of self-aligning torque (SAT), slip angle, SAT variance, steering rate, and lateral acceleration based on the condition assessment value; processing steering data obtained during a steering maneuver and associated with the feature set using a pattern classification technique; and determining a surface type based on the processing.

公开(公告)号：US20190041837A1

公开(公告)日：2019-02-07

申请号：US15668013

申请日：2017-08-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David J. Elenich ,  Yingmei Si ,  Kelly T. Jozefowicz

IPC: G05B23/02 ,  G07C5/08

Abstract: Methods, systems, and vehicles are provided for controlling an active control system for a vehicle. In one embodiment, a method for controlling an active control system includes determining a health of a first control system, via a first processor of the first control system; determining a health of a second control system, via a second processor of the second control system; selectively controlling the active control system with instructions from the first control system or the second control system, based on the health of the first control system and the second control system; and selectively controlling communications from the first control system and the second control system, based on the health of the first control system and the second control system.