William Chin-Woei Lin - Troy MI David Michael Sidlosky - Huntington Woods MI David S. Rule - Orchard Lake MI Weiwen Deng - Rochester Hills MI
Assignee:
General Motors Corporation - Detroit MI
International Classification:
G06F 700
US Classification:
701 70, 180 62, 303140
Abstract:
There is disclosed a method for integrating a vehicle stability enhancement system and rear wheel steering. The method includes inputting a vehicle speed and measured vehicle yaw rates. Determining a front and rear wheel steer angle. Calculating a desired yaw rate. Comparing the measured yaw rate with the desired yaw rate to determine a yaw error term. Applying a braking force to a wheel of a vehicle imparting a yaw moment based upon the magnitude of the error term calculated. The rear wheel steer angle is taken into account in calculating a desired yaw rate.
Michael P. Turski - Rochester Hills MI, US Matthew M. Karaba - Oxford MI, US Youssef A. Ghoneim - Torslanda, SE Mark N. Howell - Rochester Hills MI, US David M. Sidlosky - Beverly Hills MI, US
Assignee:
GM Global Technology Operations, Inc. - Detroit MI
International Classification:
B60K 23/00
US Classification:
701 41, 180204
Abstract:
A vehicle includes a plurality of sub-systems and corresponding controllers for effecting normal control thereover. The vehicle further includes a vehicle dynamics controller for providing high-priority sub-system commands for sub-system control to effect vehicle dynamics enhancements. The vehicle dynamics controller includes a plurality of independently decomposable and recomposable software components or layers and accessible inter-layer bus structure.
Operation Of Electronic Stability Control Systems Using Data From A Plurality Of Sources
A method for operating a vehicle electronic stability control (“ESC”) system utilizing values for a variable obtained from a primary source and a redundant source includes the steps of receiving a first value for the variable from the primary source, receiving a second value for the variable from the redundant source, generating a normalized value as a function of the first value and the second value, determining whether the primary source is operating correctly, utilizing the first value for operation of the vehicle ESC system if the primary source is operating correctly, and utilizing the second value for operation of the vehicle ESC system if the primary source is not operating correctly and the second value is not greater in absolute value than the normalized value.
Method For Populating Motor Vehicle Yaw Gain Tables For Use In An Electronic Stability Control System
David M. Sidlosky - Beverly Hills MI, US Christopher A. Kinser - Grand Blanc MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
B60W 30/02
US Classification:
701 82
Abstract:
An automated and algorithmic method utilizing motor vehicle steering geometry knowledge, applicable to small and large turn angles, along with knowledge of motor vehicle understeer gradient, for determining motor vehicle yaw gain by which a motor vehicle yaw gain table is populated for use by an electronic stability control system of the motor vehicle. The method may utilize either a recursive methodology of population or an open loop methodology of population.
Methods And Systems For Calculating Yaw Gain For Use In Controlling A Vehicle
David M. Sidlosky - Beverly Hills MI, US Christopher A. Kinser - Grand Blanc MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
B60W 30/02
US Classification:
701 41, 701 72
Abstract:
A method for calculating a yaw gain for use in controlling a vehicle includes the steps of obtaining a steer angle of the vehicle, obtaining a vehicle speed, determining an adjustment factor for a baseline steering geometry equation, obtaining vehicle understeer gradient as a function of lateral acceleration, and calculating the yaw gain. The adjustment factor is determined based at least in part on the turn radius. The yaw gain is calculated based at least in part on the vehicle speed, the steer angle, the vehicle understeer gradient, and the adjustment factor.
Method And System For Determining A Reference Yaw Rate For A Vehicle
The method and system described herein may be used to determine a reference yaw rate (γ) for a vehicle chassis control system, and may do so across a wide spectrum of vehicle operating conditions. These conditions may include, for example, when the vehicle is being driven: at low and high vehicle speeds, in forward and reverse directions, with front-, rear- and all-wheel steering systems, according to subtle and aggressive driving maneuvers, and on roads with flat or banked surfaces, to cite a few of the potential scenarios. According to an exemplary embodiment, the method and system take into account certain tire dynamics, such as the relaxation length (λ) of the tires, when estimating the reference yaw rate (γ). Once an accurate reference yaw rate (γ) is determined, the vehicle chassis control system may use this estimate to control one or more actuators that can influence the yaw rate of the vehicle. Some non-limiting examples of systems that may include such actuators are chassis systems, brake systems, steering systems, suspension systems, safety systems, stability control systems, traction control systems, torque control systems, or any other system that can affect the vehicle yaw rate.
Steering Haptic Feedback System For Vehicle Active Safety
William C. Lin - Troy MI, US David M. Sidlosky - Beverly Hills MI, US
Assignee:
GM Global Technology Operations, Inc. - Detroit MI
International Classification:
A01B 69/00
US Classification:
701 42, 701 41
Abstract:
A system and method that warn a vehicle driver by shaking or dithering the steering wheel that one or more active control systems on the vehicle is providing active control. The system includes an AFS actuator for providing a steering assist signal for stability control purposes, and a VES actuator for providing resistance against turning of the steering wheel. The system also includes a controller for causing the AFS actuator to shake the steering wheel if the active control is active and for causing the VES controller to apply and release tension to the steering wheel if the steering wheel is turned and the active control is active. The controller may increase the shaking of the steering wheel as the amount of the active control increases.
William Lin - Troy MI, US David Sidlosky - Beverly Hills MI, US Jing Zhang - Grosse Pointe Park MI, US
International Classification:
G06F 17/00
US Classification:
701036000, 701001000
Abstract:
An on-board information system is provided, including a help facility, which is operable to provide information to a requester. The information comprises audio or audio-visual descriptions for operating various systems and control devices, using on-board or off-board devices. An information system is provided, comprising a requestor-initiated information inquiry device, an information storage system, and, an information communications center. The information storage system communicates information to the communications center based upon a request for information initiated by the requester to the information inquiry device. The request for information can be canceled during delivery. The system is applicable to vehicles and other systems wherein operators may have limited knowledge of functioning of all aspects of the system.
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